1 43

Vol.X, Nos.4-6,1922]
lRoprintedfromInsecutorInscitie Menctruue,
FOUR UNDESCRIBED SPECIES OF LIMNOBIAFROM THE ORIENTAL REGION(Diptera, Tipulide)
Bv CHARLES P. ALEXANDER
The high mountains of the Oriental Region support a richfauna of crane-flies of the tribe Limnobiini. The four undescribed species of. Limnobia (Lirnonia) were included in material sent to me by Mt. J. B. Corporaal, collected in Sumatra,
and by Mr. Teiso Esaki, collected in Formosa or Taiwan. The
author's thanks are extended to the collectors of this material
for the privilege of retaining the types.
Limnobia

megastigma, new species.

General coloration yellow; antennal scape yellow, the flagellum black; mesonotal praescutum with four brown stripes;
femora brown with an obscure yellow subterminal ring, the tips
black; wings yellow, the stigma very large, brownish black;r at tip of Rr.
Male.-Length, 9 mm.; wing, 11.2 mm.

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INSECUTORINSCITII1

MENSTRUUS

Rostrum and palpi black. Antennae with the scape obscureyellow; flagellum black. Head discolored in the tvpe, appari:ntly obscure yellow.
Mesothorax unusually giblmus. Mesonotal praescutum shiny
yellow with four conspicuous black stripes, the intermediatepair narrowly connecteclbefore the sutnre ; scutal lobes rlarkened laterally; remainder of lnesonotum obscure yellow.
Pleura obscure yeilow. Halteres with the basal two-thirdsof the stem obscure yellorv, the remainder brownish black.
Legs with the coxa.e and trochanters yellow; femora
brown, the tips broadly black; a conspicuous, ,rbscureyellow subterminal ring, slightly more extensive thanthe black femoral tip; tibiae black, the base a little paler;
tarsi black. Wings with the apex obtuse; generai coloration yellow, the base and costal region bright yellow; stigma
very large, brownish black, occupying the entire area between
the end of Rs and r; a small brown spot at origin of Rs,'
indistinct brown seams along the cord and outer end of cell
tst Mr; a more conspicuousbrolvn seam along Rrf, beyond,the stigma; all longitudinal veins very faintly seamed withbrown; veins brownish black. Venation : Sc, at the extreme
tip of Sc, and exactly opposite the end of Rs,' Rs strongly
angulated at origin; r at extreme tip of 1?,, strongly arcuate;
veins Rrf , and RnJ-, bent strongly caudad beyond midlength;
basal deflection of Cu; immediately before the fork of M.
Abdominal tergites orange-yellow, each with a broad, brown
median triangle; sternites obscure brownish yellow. Hypopygium bright yellow.
Habitat.-Sumatra.
Holotype, 6, Brastagi, altitude 4,250 feet, May 15, 1921
(J. B. Corporaal).
Limnobia flavoterminalis, new species.
General coloration yellow; praescutum without distinct markings; scutal lobes infuscated ; knobs of halteres yellow; femora
yellow with a conspicnous dark brown ring, the tips broadlyyellow ; wings yellow, marbled with brown; Sc long; abdominal
tergites dark brown, the sternites obscure yellow.

IN S D C U TOR IN S C ITI,dMIi N S TTTU U S

ryrlMale.-I.ength, 7 mm.; wing, 8 mm.
Rostrum and palpi black. Antennae with the first segmentof the scape black; remainder of antenna broken. Head darkbrown.
Pronotum yellow. Mesonotal praescutum yellow without distinct darker markings, near the suture with a faint infuscationin the region occupied by the usual interspaces; scutum yellow,
the centers of the lobes dark brown; scutellum yellow, margined with dark brown; postnotum with the median sclerite
trrown in center, fading into obscure yellow laterally. Pleura
yellow with a very ill-defined, longitttdinal, brown stripe.
Halteres pale, the knobs light yellow. Legs with the coxae
and trochanters greenish yellorv; femora brownish yellow witha narrow but conspicuous,dark brown ring that is a little morethan one-half as wide as the yellow tips; tibiae dark brown,
the bases very narrowly obscure yellow; tarsi dark brown.
Wings yellow, the costal region more saturated; wing-membrane
extensively marbled with brown, this appearing as five illdefined fasciae; the first fascia lies in the basesof cells R andM; second fascia near mid-length of cell R, extending acrosscells R, M and less clearly in Cu and the anal cells; third
iascia broad, extending from the origin of Rs, along the sector
to the end of Scr, continued caudad along the cord and lessdistinctly across the distal third of cells R, M and the end ofcell Cu; the fourth fascia includes the small stigma at r and abroad seam along the outer end of cell tst Mr; the terminal
fascia occupiesthe wing-tip; anal cells pale brown with creamcolored spots; anal angle pale; veins btown, more yellowish in
the pale areas. Venation: Sc very long, Sc' ending just before
the end of Rg $c, about five times as long as Scr, ending somedistance beyond the end of Rs,' Rs arcuated; r a little less than
twice its length from the tip of R, ; cell rsf M, elongate, widened
distally ; 'ttu arctrated, about three-fourths the outer deflection
ol Mr; basal deflection of. Cu, at the fork of M.
Abdominal tergites dark brown, the sternites obscure yellow;
hypopygium obscure brownish yellow.
Habitat.-Formosa.

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INSECUTORINSCITI4MDNSTRUUS

Holotype, 6, Tattaka, altitude about ?,400 feet, August 1?,
1921 (T. Esaki).
Limnobia esakii, new species.
General coloration yellow; mesonotal praescutum with asingle dark brown stripe; femora black with a conspicuous,subterminal yellow ring; wings yellow, spotted and cloudedwith brown; Sc short, ending a short distance beyond the originof /?s; abdominal tergites broln, thc sternites yellow, ringed
caudally with brown.
Female.-I*ngth, 8 mm. ; wing, 7.2 mm.
Rostrum and palpi black. Antennae black, the apex of thesecond scapal and base of the first flagellar segment indistinctly
paler; antennae longer than usual in this genus. Head dark
brorvn, the anterior part of the vertex with an appressed graypubescence.
Pronotum dark brown. Mesonotal praescutum yellow witha broad, brown, median stripe that widens at the suture;scutum dark brown, the median area pale; scutellum darkbrown, the anterior margin with a pale median spot; postnotum
dark brown. Pleura yellow. Halteres brown, the base of thestem obscure yellow. Legs with the coxae and trochanters
yellow; femora brownish black, r'ery indistinctly paler at base;a conspicuous, subterminal yellow ring that is a little wider
than the black apex; tibiae black, the extreme base indistinctly
pale; tarsi black. Wings tinged with yellow, more saturated
basally and on the cephalic portion; a conspicuous, pale brownpattern, arranged as follows: A large blotch near midlengthof cell R; a conspicuous blotch at the fork of Rs, connectedalong R,f,with the stigmal blotch; cord and outer end ofcell rs/ M" narrowly seamed with brown; stigma large, brown;
small but darker brorvn spots at tip of Sc and origin of Rs,.
wing-apex faintly infuscated, this including the distal half ofcell znd R' R*, the distal two-thirds of R, and rnost of cells
end, M" and M"; a brown clond along vein Cw; veins brown,
Sc more yellowish. Venation: Sc short, Sc, ending justbeyond the origin of Rs, Sc, at the tip ofRs short, strongly-lrr;

INSDCUTORINSCITI,dMENSTAUUS?9angulated at origin; r more than twice its length from the tipof Rr; deflection of .R.f u arcuated; cell rsl M, closed, relatively small ; basal deflection of Cu, before the fork ol M.
Abdorninal tergites dark brown; sternites yellow, the segments narr wly ringed caudally with dark brown. Ovipooitor
with the tergal valves very long and slender, straight.
Habitat.-Formosa.
Holotype, 9 , Tattaka, altitude about ?,400 feet, August 17,
1927 (T. Esaki).
This interesting Lirnnobia is dedicated to the collector who
has secured many unclescribeclspecies of Tipulidae in themountains of Formosa.
Limnobia viridula, new species.
General coloration light green; antennal scape dark brown,
the flagellum pale brownish testaceous;vertex between the eyes
silvery white; pronoturn and anterior margin of praescutum'with a narrow btown, median stripe; legs brown; wings subhyaline, stigma smail.
Mole.-I.ength, 6.8 mm.; rving, 8.6 mm.
Rostrum and palpi dark brown. Antennae with the scapedark brown, the flagellum conspicuously pale brownish testaceous. Head dark brown, the vertex between the eyes conspicuous silvery white.
Pronotum light green with a narrow brown median stripe.
Mesonotum light green, the cephalic portion of the praescutumr,vith indications of a brown median stripe. Pleura light green.
Halteres pale, the knobs infuscated. Legs with the coxae andtrochanters pale green; remainder . of the legs brown, thefemoral bases a little paler. Wings subhyaline; stigma small,circular, pale brown; veins brown, Venation: Sc, ending
nearly opposite r-tn; Rs arcuated; r at tip of Rr; cell rst M"
rectangular; veins beyond the cord long and parallel as in thegenus Libnofes,' basal deflection of Cu, just before the forkof M .
Abdomen light green, including the hypopygium; pleuralrnembrane f:aintly infu.scate.d. Male hypopygium with the80rNSEcuToR rNscrTr4

MENSTRUUS

dorsal pleural appendage small; ventral pleural appendage
large, the rostriform lobes bearing a single acute spine.
Habitat.-Formosa.
Holotype, 8, IJrai, altitude about 1,500 feet, October 2,1921 (T. Esaki).