22 
Psyche 
[March 
ways from those of Poecilopompilus and Episyron) . Female with 
only a few thin setae at apex of abdomen. 
Key to Species 
Females 
1. Wholly black, pubescence mostly dark and with strong bluish re- 
flections; spines of tarsal comb very short (Peru) 
elsinore Banks 
Abdomen rufous, pubescence brownish to silvery ? without strong 
bluish reflections; spines of tarsal comb very long 2 
2. Hind tibiae and tarsi and middle tarsi mostly rufous; entire body 
covered with conspicuous silvery pubescence (Mexico) 
mexicanus Dreisbach 
Middle and hing legs wholly black; pubescence finer and over 
most of head and thorax somewhat brownish 3 
3. Head rather thick, the temples, as seen from above, about as 
wide as the eyes (Fig. 8) (Chile) chilensis n. sp. 
Head thin, the temples not nearly as wide as the eyes (Fig. 9) 
(Argentina, southern Brazil) gastricus (Spinola) 
Males 
1. Coloration similar to that of female, the head and thorax black, 
the abdomen either black or rufous; legs black 2 
Coloration very different from that of female, black or black 
and ferruginous, scutellum and metanotum spotted with yellow, 
and usually with other yellow markings on the body; legs an- 
nulated with yellow 3 
2. Abdomen black ; slope of propodeum low and even ; digiti with 
short setae (Fig. 7) (Peru) elsinore Banks 
Abdomen rufous; propodeum, in lateral view, strongly convex, 
with a somewhat flattened declivity, digiti with longer setae 
(Fig. 5) chilensis n. sp. 
3. Tibiae black, more or less marked with yellow; clypeus black, 
rarely yellow on extreme sides; a robust species (Argentina and 
southern Brazil) gastricus (Spinola) 
Tibiae mainly rufous, with yellow markings; clypeus broadly 
yellow on the sides; more slender species 4 
4. Posterior rim of propodeum and a broad band on first tergite 
yellow; digiti of genitalia somewhat acute apically; length 
6.5 mm, fore wing 5.5 mm (northern Brazil) 
exiguus ( Banks) 
Posterior rim of propodeum and first abdominal tergite mostly 
or wholly black; digiti rounded apically; length 7 to 9.5 mm, 
fore wing 6. 5-8.5 mm (Mexico) mexicanus Dreisbach 
