436 Records of the Indian Museum. [VoL. XI, 
The Charon group is probably older than the Savax group, 
its range being wider, the hind tibiae being 4-jointed in all except 
two species (in which they are 3-jointed), and the arms being 
comparatively long and slender, at least in well developed males, 
in most if not all species. The carapace of the former group, too, 
resembles that of all other subfamilies of Tarantulidae, and also, 
apparently, that of the newly hatched larvae of the only species— 
Phrynichosarax cochinensis—of the Sarax group whose larvae I 
have seen, 
The hind tibiae of the Savax group may be 2-jointed (occa- 
sionally even entire), and the proportion of the species in which 
they are 4-jointed appears to be smaller than in the Charon group. 
The arms are almost invariably short and stout even in males. 
The relative lengths of the two dorsal spines on the hand, and 
of those on the end of the arm, may perhaps to some extent be 
correlated with cavernicolous habits in both groups. So far as I 
know, however, nothing is known of the habits of the genus 
Charon, one of the two genera of its group in which the spines 
tend to resemble those of the single exclusively cavernicolous genus 
Catageus of the Sarax group. A few species of the latter group 
belonging to the non-cavernicolous genera have, moreover, been 
found in caves. 
The finger is jointed in all genera except Charon. 
The genera of Charontinae may now be defined as follows :— 
Margin of carapace indentated beside ister 
eyes : (Sarax group) 2. 
isaterd eyes ‘situated further from margin of 
carapace, which is entire ... (Charon group) 4. 
j 
Longest spine on tibia of the arm the middle one 
of five well developed dorsal spines in adults, 
and of three in young; proximal dorsal spine 
of hand longer than distal Catageus, p. 437- 
Penultimate well dev eloped dorsal spine of tibia 
of arm the longest in all stages; distal dorsal 
spine of hand longer than proximal 3: 
Tarsi (exclusive of metatarsi) 4- -jointed ; Bieel 
tibiae 2- to 4-jointed (sometimes entire on one 
side) but normally 3-jointed (? always) Phrynichosarax, p. 437+ 
Tarsi (exclusive of metatarsi) 5- UAC irs hind 
tibiae 4-jointed f2 5 . Savax; p. 441. 
Penultimate dorsal spine of tibia af arm the ere 
est, the one next behind it longer than the one 
next behind that; distal dorsal spine of hand 
longer than proximal, not 5 aaa by 
additional spines i Be 
Penultimate dorsal spine of tibia of arm not 
ae longer than the one next behind it, often 
about equal to the one next behind that, 
sometimes even shorter; long spine on dorsal 
side of hand usually succeeded by several 
shorter ones,!a short spine often fused to it 
proximally at base ,,, Te ah 6. 
t Always, so far as is known, except in Stygophrynus moultont, for which a 
new genus ought perhaps to be established. 
