1915.] F, H. GRAVELY : Oriental Tarantulidae. 443 
Genus STYGOPHRYNUS, Kraepelin.! 
Type S. cavernicola (Thorell). 
In this genus, as in all of the foregoing of which I have 
sufficient knowledge to speak with certainty, particular spines on 
the second appendages have proved to provide admirable charac- 
ters for specific diagnoses, while others are absolutely worthless 
for this purpose. The granulation of the surface of these appen- 
dages, and of the carapace, is also important in this connection. 
The following species may be recognized :— 
Armature of hand consisting of two long dorsal 
spines and one ventral one only ... S. moultoni, p. 443. 
1. Hand armed above and below with one long 
spine succeeded by a series of short spines 
which increase in length distally .. Pap 
Adults pale in colour 2, rather small and very 
lightly built, with long slender arms; occular 
lobes of carapace finely and evenly granular, 
without tubercles os = «. S- Cavernicola, p. 444. 
Adults somewhat or much darker in colour, 
larger and more heavily built with much 
stouter arms, occular lobes of carapace more 
coarsely and less evenly granular, usually 
marked with a number of scattered tubercles a 
Distal of three long spines on dorsal margin of 
tibia of arm with a spine of nearly half its own 
length on either side of it S. longispina, p. 445- 
Spines on either side of distal of three long 
spines on dorsal margin of tibia of arm quite 
short in adults, the proximal one short in young 
specimens also ay Ae 
er somewhat pale 2 in colour, not very 
strongly granular ce ... 9. berkeleyt, p. 445. 
Adults very dark and strongly granular ws. Se Cerberus, p. 446. 
Stygophrynus moultoni, n. sp. 
(Plate xxxips fie 565) 
Mr. Moulton has sent me a single much broken specimen of 
this species. It was found on Klingkang summit, between 
Sarawak and Dutch Borneo. It is somewhat small, but appears to 
be mature or very nearly so. It is a male and is very distinct 
from all other species of the genus. 
The carapace is 7'4 mm. broad by 5°7 mm. long in the middle 
line. It is somewhat pale in colour, finely granular and without 
tubercles, like that of S. cavernicola. 
The arms (pl. xxxi, fig. 9) are somewhat slender, but are 
much shorter than in adult males of that species, the femur being 
no longer than the carapace is broad. The armature of the femur 
resembles that of S. cavernicola, but the spines are necessarily 
closer together. The tibia is also ‘armed much as in that species, 
but the subsidiary spines among the longer spines of the ventral 
1 Abh. Ver. Hamburg, XIII, p. 44. 
2 The young of all species are pale in colour and have relatively short arms. 
