74 
Psyche 
[June 
species have been described and illustrated in a previous paper (Levi, 
1955 )- 
Key to Stem mops 
i a. Males 2 
ib. Females 9 
2a. Embolus coiled (Fig. 9) ; Panama servus sp. n. 
2b. Embolus not coiled 3 
3a. Palpal embolus short, framed by outline of bulb or cymbium 
in ventral view 5 
3b. Palpal embolus long, partly covering cymbium margin in ven- 
tral view 4 
4a. Radix with a hook (1955, figs. 17, 18) ; Georgia, Gulf states, 
Mexico to Panama, Bahama Isl. bicolor O. P.-Cambridge 
4b. Radix with a spine (1955, fig. 19) ; Mexico lina Levi 
5a. Embolus filament thick; half as wide as area surrounded by 
embolus (1955, fig. 20) ; Yucatan, Tabasco, Honduras 
cambridgei Levi 
5b. Embolus filament fine, one-third as wide as area surrounded by 
embolus ( Figs. 1, 3, 6) 6 
6a. Carapace sclerotized, brown; area between lateral and median 
eyes not black (Fig. 3) ; Minas Gerais, Brazil vicosa sp. n. 
6b. Carapace soft, yellowish; area between lateral and median eyes 
black 7 
7a. Distal portion of embolus almost straight, pointed distally 
( 1 955, fig. 22) ; eastern United States possibly to Panama 
ornatus (Bryant) 
7b. Embolus describing a half circle, its tip pointing ectally (Figs. 
1. 6) ; 8 
8a. Area enclosed by embolus in ventral view longer than wide 
(Fig. 1 ) Venezuela sub tills (Simon) 
8b. Area enclosed by embolus in ventral view subcircular (Fig. 
6) ; Southern Mexico to Panama questa Levi 
9a. Epigynum with triangular median dark area (Fig. 5) ; Minas 
Gerais, Brazil vicosa sp. n. 
9b. Epigynum otherwise 10 
10a. Epigynum with a median depression or dark marks (Figs. 
15, 18) . 11 
10b. Epigynum otherwise, with an indistinct transverse lip (Fig. 
12), Panama servus sp. n. 
iia. A median dark mark (Fig. 15) or a median dark septum in 
