508 THE AMERICAN NATURALIST. | [Vor. XXXIV. 
Key to Species. 
A. Rostrum acute or spiniform. 
B. Rostrum long-pointed, terminating in a slender spine 
P. gracilipes Stimpson, M( CH ).SG 
B'. Rostrum short-pointed, not terminating in a spine. 
C. A large postorbital tooth near the eye 
P. lamelligera (Stimpson), G 
C'. A small postorbital tubercle, remote from the eye 
P. hemphillii (Lockington), D 
A’. Rostrum not acute, but rounded. 
B. Pterygostomian region with a laminate crest. Basal antennal 
joint with lateral crests laminate P. réised Stimpson, M( CH)G 
B’. Pterygostomian region with a tubercle. Basal antennal joint with 
lateral crests smooth and rounded P. hyfoglypha (Stimpson), G 
S 2 Fic. 2. — Euprognatha 
Fic. 1. — Podochela riisei. rastellifera. 
Genus /Epinus Rathbun . . A. iore apos Ris Milne-Edwards), G 
Genus Erileptus Rathbun . . . E. spinosus Rathbun, D 
Genus Arachnopsis Stimpson . . . . . A. filipes Stimpson, G 
Genus Dasygyius Rathbun . . . . D. diro dees (Lockington), D 
Genus Inachoides Milne-Edwards Lucas . Z. magdalenensis Rathbun, D 
Genus Collodes Stimpson. 
Key to Species. 
A. Carapace with median spines 
C. depressus A. Milne-Edwards, M( CH )SG 
A’. Carapace without median spines. 
B. Interantennular spine advanced as far as the rostrum 
C. semen E G 
B. Interantennular spine not advanced as far as the ro 
C. dul ciii M 
Genus Anasimus A. Milne-Edwards. 
