ART, 20. NEW GENERA OF LEPTOGASTRINAE—ALDRICH. 3 
or not. The empodia are slightly developed in the form of a middle 
claw which is about one-third as long as the outer ones. 
Genotype.—Eurhabdus zephyreus, new species. 
EURHABDUS ZEPHYREWUS, new species. 
Female.—Shining black; the orbits and pleurae with white pollen; 
the front and middle legs, except the coxae, pale yellow; hind legs 
yellow except the clubbed apical fourth; hind tibiae yellow; the 
apical third black and considerably swollen; hind tarsi black; 
halteres long and slender, yellow, with a shining black knob. 
Length, 6.2 mm. 
Described from one female collected at Higuito, San Mateo, Costa 
Rica, by Pablo Schild. 
Type.—Female, Cat. No. 25307, U.S.N.M. 
In order to bring out as clearly as possible the remarkable reduction 
which the venation in this species has undergone I have had a figure 
prepared (fig. 3) of the venation of the type species of Leptogaster 
in which dotted lines are used to indicate the veins which are absent 
in Eurhabdus. 
Fig. 3.—WING OF LEPTOGASTER CYLINDRICA. THE VEINS INDICATED BY DOTTED LINES ARE ABSENT 
IN EURHABDUS. DRAWN BY CHARLES T. GREENE. 
Genus LEPTOPTEROMYIA Williston. 
Leptopteromyia Witurston, Manual of North America Diptera, ed. 3, p. 195, 1908. 
This genus exists only by virtue of a named figure in one of Willis- 
ton’s plates. The type species is L. gracilis Walliston, named, but 
not described, on the same page, and said to be from Brazil. The 
head of the specimen is not figured and probably had been broken off. 
The general appearance is precisely that of Leptogaster except that 
there is apparently no empodium and the wing is much narrower on 
the basal half. The figure shows a normal discal cell, no seventh 
vein, first vein present, and probably the auxiliary. The species can 
in all probability be recognized without difficulty from the figure 
when rediscovered. The location of the type syeummen at the present 
time is unknown. 
