1968] 
Evans — Neotropical P ompilidae 
13 
own diameters; mesoscutum with a pair of pale streaks which 
are often confluent behind; margin of parameres with one or 
two short series of pegs (Figs. 18-20) 3 
2. Thorax uniformly light ferruginous (mesoscutum somewhat 
darker) ; aedoeagus nearly as long as parameres, with a short, 
truncate apical lobe ; parapenial lobes very broad, constricted 
subapically (Fig. 16) imitator new species 
Thorax patterned with light yellowish -brown and dark brown or 
fuscous; aedoeagus much shorter than parameres, with a long, 
rounded apical lobe; parapenial lobes relatively slender (Fig. 
17) longulus (Banks) 
3. Propodeum strongly swollen along the median dorsal line; size 
large, fore wing about 15 mm; abdomen without yellow band- 
ing; genitalia as shown in Fig. 18 impensus new species 
Propodeum with the slope low and smooth, not at all swollen 
medially; smaller and more slender species, fore wing under 
14 mm; abdominal tergites with apical yellow bands in most 
specimens 4 
4. Clypeus black, at least in part; propodeum black or with a pair 
of broad blackish stripes; parameres with a single set of about 
five pegs at the squama (Fig. 20) vitreus (Fox) 
Clypeus yellow; propodeum yellow, usually with a pair of narrow 
fuscous stripes; parameres with two sets of 3-5 pegs each 
(Fig. 19) argentinicus (Banks) 
Chirodamus argentinicus (Banks) new combination 
Amerocnemis argentinica Banks, 1946, p. 500 [Type: $, Argentina: Tucu- 
man (C. S. Reed) (Cornell Univ., No. 2553)]. 
Amerocnemis brasiliensis Banks, 1946, p. 501 [Type: $, brazil: “Barro 
Alto, Est. Minas” 2 , Nov. 1931 (J. Blaser) (Mus. Comp. Zool., No. 
26652)]. New synonymy. 
Plesiallotype . — $, Argentina: Horco Molle, Tucuman, 23 Jan. .-4 Feb. 
1966 (C. C. Porter) [Mus. Comp. Zool.]. 
Description of female plesiallotype. — Length 13 mm; fore wing 
12.5 mm. Body and legs black; antennae black except orange beyond 
segment five above, beyond segment three below; wings translucent, 
strongly tinged with orange except outer margins narrowly and light- 
ly infuscated. Pubescence wholly dark, with bluish reflections on the 
abdomen; body sparsely setose, the propodeum with only some short, 
fine hair on the sides ; front, vertex, mesonotum, and all coxae with a 
2 I have been able to find a Barro Alto in central Goias, but not in Minas 
Gerais. 
