1969] 
Evans — P ornpilidae 
21 
mimic social wasps (in both sexes), but none appear to have Polybia 
occidentalis as a model. 
It is possible that the all-black species elsinore is the most primitive 
member of this complex, for it is remarkably like an Episyron, differ- 
ing chiefly in the total absence of squamose pubescence. On the other 
hand, it may be a species derived from a chilensis- like or gastricus-like 
ancestor, the black color of both sexes being selected for within its 
range (arid portions of coastal Peru) because of the absence of the 
usual models and the presence of all-black models in this area. 
In summary, the coloration of the five species of this genus may 
tentatively be described as mimetic in the following manner: 
Wholly black Black with Black and 
(like many rufous abdomen yellow (re- 
solitary wasps (like many sembling 
solitary wasps) Polybia 
occidentalis 
complex) 
elsinore Females & males 
chilensis ..Females & males 
mexicanus Females Males 
exiguus (Females?) Males 
gastricus Females Males (poly- 
morphic, re- 
sembling 
several mem- 
bers of complex) 
Genus austrochares Banks 
Austrochares Banks, 1947, p. 423 (type species: Pompilus gastricus Spinola, 
original designation). — Evans, 1966, p. 200. 
Generic characters . — Clypeus not or barely wider than lower 
interocular distance, apical margin truncate, upper margin strongly 
sinuate, with notches at the anterior tentorial pits; eyes of female 
strongly convergent on the upper third; ocellar triangle broad and 
rather flat. Scutellum and central part of metanotum convex; post- 
notum constricted medially and before the spiracles, slightly arcu- 
ately expanded between these constrictions ; legs strongly spinose, 
front tibiae spinose for most of their length, front tarsus of female 
with a strong pecten; claws of both sexes bifid, inner ray truncate; 
pulvillar pad small, the comb weakly developed. Wings as figured 
by Evans, 1966, fig. 16, the second recurrent vein arising more than 
half way from base of subdiscoidal vein to wing margin, anal vein 
of hind wing meeting media at or slightly beyond origin of cubitus. 
Male genitalia with the basal hooklets double, parameres slender, 
aedoeagus with a few small setae (genitalia differing in no important 
