284 Records of the Indian Museum. [Vol 
Genus Selenocosmia, Ausserer. 
The palpal parts of the stridulating organs of this genus 
have already been described (p. 283). The parts situated on 
the sides of the chelicerae normally consist of a number of long 
and slender spines mixed with, and not always sharply differen- 
tiated from, scattered hairs which are continuous with the thicker 
covering of the lower margins. In S. himalayana, however, these 
spines are shorter, and not mixed with hair, resembling those found 
in Chilobrachys assamensis and /umosus, rather than those found in 
other members of its own genus. In this species, too, the group 
of claviform bacilli on the palp is elongated at the expense of the 
downwardly curved ends of the group of simpler bristles, the two 
groups being almost equal in extent. It approaches Chilobrachys 
in these characters of the palpal part of the stridulating organ, 
to a greater extent than does any other species of Selenocosmia 
known to me. I have elsewhere figured a typical stridulating 
organ of the genus Selenocosmia (1915, pl. xxxi, fig. 4). 
Two Indian subgenera may be recognized, though their value 
is uncertain. They may be distinguished thus :— 
Fourth legs much thicker than first, 
their metatarsal scopulae entire and 
extending to the base of the segment Lyrognathus. 
Fourth legs not thicker than first, their 
metatarsal scopulae weaker and 
apical ue a .. Selenocosmta., 
Lyrognathus is represented in our collection by two specimens. 
One, from the Khasi Hills, has been determined by Hirst as L. 
crotalis; the other, from the Garo Hills, has been determined by 
myself as L. pugnax. I am very doubtful whether they are 
really distinct. 
Selenocosmia is represented by one specimen from the Anda- 
mans doubtfully referred by Hirst to S. javanus ; by two imma- 
ture specimens from the same group of islands; by several 
specimens with slenderer legs from Sibsagar in Assam; and by 
several specimens (mostly males) of S.iimalayana. The last named 
species was described by Pocock from a specimen from Dehra Dun, 
said to be a female, the length of whose carapace was I5 mm. 
Hirst (1907, pp. 523-4, text-fig. 2) has since described a male from 
Kasauli, 6,600 ft., with a carapace length of 20 mm., and a female 
from Dalhousie, 6000 ft., with a carapace length of 18 mm.; he 
therefore concludes that the type wasimmature. This was not neces- 
sarily the case, however, for we have adult males whose carapace 
lengths range from 8'5-12°0 mm. ‘Two of these are from Dehra 
Dun, two from Almora, 5500 ft., and two from Naini Tal. We 
also have one female from Dehra Dun. ‘The species is evidently 
very variable in size. In one of the males from Dehra Dun the 
characteristic projection on the outer side of the palpal organ, 
though present on that of the left side, is absent on that of the right, 
