1961] 
Evans — Genus Epipompilus 
27 
the known males) ; front rather swollen above, between the antennal 
bases abruptly declivous to the much lower plane of the area frontalis 
and clypeus. Pronotum short or fairly long, sides of disc rather 
prominent, streptaulus absent or ill-defined; mesoscutellum and met- 
anotum prominent medially, latter with distinct lateral foveae; 
postnotum of variable length, front and hind margins subparallel; 
propodeum with smooth contours, slope low and even, almost flat 
behind ; front femora of female slightly to quite noticeably incrassate ; 
front tibiae and tarsi without spines, middle and hind tibiae with or 
without scattered short spines; segments of front tarsus of female 
unusually short; claws slender, with a strong, subapical tooth which 
is nearly parallel to the apical tooth ; ultimate tarsal segments without 
spines beneath, pulvillar pads small but giving rise to some strong 
setulae. Hind wing with anal lobe small, about .3-. 5 as long as sub- 
median cell, anal vein extending very slightly or not at all beyond 
junction of transverse median vein, latter vein leaving it at an angle, 
oblique, meeting media much before origin of cubitus ; fore wing with 
venation extending relatively close to outer wing margin, marginal 
cell acute, removed from wing-tip much less than its own length; 
three submarginal cells present, second and third receiving recurrent 
veins near middle, third much wider at apex than at base. Abdomen 
fusiform, in the female somewhat depressed apically, apical sternite 
rather flat, even obscurely grooved medially; male with or without 
conspicuous brushes of hair on sternites four and five, subgenital plate 
of remarkable structure, forming a very slender, hairy process apically, 
its basal plate (morphological sternite 8) unusually broad; male 
genitalia with short, simple parameres, volsellae short-setose, not 
expanded apically, basal hooklets double, aedoeagus small and of 
simple structure. 
Remarks. — Epipompilus possesses a remarkable array of unusual 
structural features ; if one follows the practice of Bradley and Arnold 
of splitting the Pompilinae into numerous tribes, there can be no 
question that the genus deserves a tribe of its own. Personally, I am 
much impressed with certain similarities with A porus and related 
genera: the pronotum is similar, the front legs of the female some- 
what incrassate, and the head shape and hairiness of the eyes suggestive 
of certain Aporini. The male genitalia suggests Allaporus , as does the 
venation of the hind wing. Any division of the Pompilinae into tribes 
can be no more than tentative until such time as the classification of 
the family from a world point of view is more satisfactorily worked 
out. In the meantime, I prefer to place Epipo?npilus in the Aporini. 
As here construed, the genus Epipompilus is strictly Neotropical 
