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FIiOM
AN UNDESCRIBEDSPECIESOF PTYCIIOPTERAWEST AFRiCA (PTYCHOPTERIDA,DIPTERA).
Bv Cnenr,us P. Ar,nxeulrn, PR'D., UnneNe, h,r.rNors'Tnn very extensive collections of African crane-flies belongsent lo..*uing to the British Muserrm (Natural Ei.-LofyL-welefoi study through the kindness of Mr. F. W. Edwards, custodian
A new species of Ptychopteraof the Nematoderous Diptera'that is describedherewiih was included in this material' The
crane-flies of this collection will be ilescribetl and keyetl in amonographic revision of the Fthiopian Tip-uloide-athat thewritei has in preparation. I wish to thank Mr. Eclwards very
sincerely for the piivileg. of studying this unrivalled collectionof tropical African crane-flies.
PtychoPtera african'a, sP. n.
Antenne wiih the basal segments yellow, the disial segments
dark brown; head blue-black; iresonotal prrescutum shiny metallic
blue; pleura light reddish-yellow; wings wltn tfre costal margin, the'"pe* und"" ,trr.ow seam along the cord dark brown; abdome!
broad
shiny bl'ack,the tergites with two ni*ow yellow rings on the third
ancl fourth segments.
Female.-Length about 9 mm.; wing, 7'8 mm.
with the bi,saltwo segmentsdull yellow,Rostrum clark6rown; palpi-brown.
Antennrervith the basalsegments
the terminal segmentsdaik
dull yellow, ot Th" sixth and succeeilingsegments passing into-darkbrowl ; basal half of the seconclscapal-segmentdark brown' Heac
the vertex surrouncling thoshiny blue-black,the fronb more opdque,antetnal fossreindistinctly reddisli.
Pronotum pale yellori. Mesonoial prmscutum . shiny metallic
blue-blaek, the' humeral angles broadly-but indisiinctly recldish;2 1021

TIIII

EN'I'OI\IOLOGIST.

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scutum, scutellum anil meilian area of the postnotum deep black.
Pleura anil lateral regions of the postnotum light reddish-yellow.
Halteres dark brown, the base of the stem paler. Legs with thecoxre and trochanters yellow; femora dark br:own with the bases
yellowish, these broacleston the fore legs, where they occupy almost
the basal haif, on the hind iegs very narrow; tibire ancl tarsi ilark
brown. Wings subbyaline,the costal margin, the bloail wing-apex
and a narrow seam along the cord clark brown; the costal margin
includes cells C a,ndSc and the basesoI cellsfl and .l/; the wingapex incluclesall of cells .B 4 and,M 2, the inner margin of this area
being almost sLraight,continued obliquely backward from the enil ofSc; the seam along the coril is broadest anteriorly, narrorved to apoint at the bend of Cu,2; the outer margin oI cell,Cu 1 is narrowll'darkened; veins dark brou'n. Venation : Rs short, almost straight,
longer than r-m.n 2 + 3 and R 4 1 5 arising directiy from the enclof -Es. The macrotrichirBin the distal cells are founclin most of thearea ilistad of the cord in cells %tclM and Cu 1 ancl aiong the wingrrrargin in cell Cw.
Abdomen with the basal tergite yellow, the remaining tergites
shiny black with a narrow yellow ring on the third and another atthe baseof the fourth segment; last tlvo segmentsand the valvesot
the ovipositor paie brolvn.
H abitat.-- Southern Nigeria.
Holoiype, i , Ilesha, September 17th, 1911, caught in house,
8.30 a.m. (Capt. Ir. E. H. Humfrey).
Type in the collection of the British l{useum (NaturalIlistory).
Ptychoptera afri,cana is the second species to be describedfrom the Ethiopian region, the otirer Leing P. capensis,
Alexander, of Natal ('Annals Souih African Museum,' xvii,
pt . 2, pp. 1 3 9 , 1 4 0 , 1 9 1 7 ). By th e a u thor' s hey to the speci esof
Ptychoptera (' Canadian Entomologist,' xlv, 1rp.197, 198, 1913)
the present form would run out at coupler 4.
It more orless resemblesP. distincfa, Brunetti, of India, in the dalk costal
margin and wing-apex, but is readily told by the yellow thoracic
pleura and other characters.

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