[Reprinted from Insecutor Inscitie Menstruue, Vot. XIV, Noe. 1-3, 1926.]

AN UNDESCRIBEDSPECIESOF DIXA FROM WEST
AFRICA(Diptera,Diridae)
Bv CHARLES P.,dLEXANDER
An interesting species oI Dira has been received from myfriend, Rev. Jacob A. Reis, taken in the Cameroun. I am
greatly indebted to Mr. Reis for this and other valuable material received in the past. The types of the species are preserved in the writer's collection.
In an earlier paper (Ins. Ins. Mens., 10: 19-20; t922) I
outlined the then known distribution of the family, indicating
its apparent absence from the Australian and Ethiopian regions.
More recently the exhaustive studies of 'Dr. Andr6 Tonnoir
have added rather numerous species to the Australasian fauna

INSECUTORINSCITI4 MENSTRUUS

11(New Zealand, 6 species; Australia and Tasmania, 6 species)
while the present record of the group from the Ethiopian region
gives to the family a Cosmopolitan distribution. Until very
recently the group was known only by the single genus Dirh
but new subgeneric and generic divisions have now been madeby Dyar and Shannon (Ins. Ins. Mens., 12: 193-201; November, 1924) and Tonnoir (Records Canterbury Mus., 2 ; ZPI233 ;. December, 7924).
Dixa (Paradixa)

camerounensis, new species.
Male: Length abogt 2.8-3 mm.; wing 3.2 mm.
Female: Length about 3.5 mm.; wing 3.2-3.4 mm.
Rostrum and palpi brown to dark brown. Antennae elongate,
in the J if bent backward extending to opposite one-third thelength of the abdomen; scapal segments obscure fulvouls;
flagellum dark brown with conspicuous erect setae. Headbrown.
Mesonotum fulvous brown medially, darker laterally, thesublateral and humeral regions more yellowish; a narrow transverse dusky line behind the humerus; scutal region darker;
scutellum testaceous; postnotum darker brown. Pleura darkbrown, paler ventrally, or in some cases,yellowish brown lined
longitudinally with narrow dark brown stripes. Halteres pale,the knobs a little darker. Legs with the coxae shiny brownish
yellow, darker at base; trochanters brownish yellow; femora
obscure yellow, narrowly tipped with black, usually precededby
a broad, clearer yellow ring; tibiae obscure yellow, the basedusky, the tips more or less infuscated; tarsi pale brown, darker
apically; segmentsof legs with conspicuouserect setae. Wings
yellowish subhyaline, the costal margin tinged with yellowish
brown; a similar suffusion along vein Cu; a narrow darker
brown crossbandentirely traversing the wing at the cord, widest
in the fork of Rs, narrowed posteriorly; apices of longitudinalveins narrowly and indistinctly seamed with brown; veins
yellowish, darker in the infuscated areas. Venation: Sc1 endinga short distance before the origin of Rs,' Rs relatively short,straight or even slightly convex; r-?n a. little longer than to12

INSECUToRINSCITI4 MENSTRUUS

twice the length of the basal deflection of Ra*6; petiole of cell
1ls about two-thirds the cell.
Abdominal tergites obscure brownish yellow, the sternites
brighter yellow; lateral margins of the segments with narrowdark brown linear marks to produce a narrow lateral stripe;
hypopygium brown.
Habi,tat: CamerounHolotype,6f, Muami, altitude 1,000 feet, August Z, tgZB;
from moss on bank of brook, rainy wet weather (J. A. Reis).
Allotopotype,l.
Paratopotypes, 6 $1.