286 Records of the Indian Museum. Vol. ae 
evidence is not yet conclusive; and in any case these species 
furnish an interesting indication of the manner in which the more 
typical forms of the genus Chilobyachys must have arisen. I have 
already figured elsewhere the stridulating organ of the type speci- 
men of C. styidulans (1915, pl. xxxi, fig. 6). 
Of the three remaining Indian species of Chilobrachys, which I 
am able to identify in our collection, C. fimbriatus appears to be 
the most primitive, z.c. the least removed from Selenocosmia, in the 
structure of its stridulating organs; for the rows of small bacilli 
are more numerous than is usual in either of the others. In Chilo- 
brachys hardwickit the extent of these small bacilli appears to 
be somewhat variable, but it is usually less than is the case in our 
single specimen of C. fimbriatus ; the shape of the whole group of 
bacilli in C. hardwickii is, moreover, longer and narrower, and so 
more like that of C. stridulans, in which the rows of small bacilli 
left exposed by the dorsal fringe of hair are still fewer. Another 
variable feature of C. hardwickii, and one in no way correlated 
with the variations found in the stridulating organ, is its size. 
The mature males in our collection have carapaces varying in 
length from barely 10 to over 16 mm. in length. The smallest 
males are associated with specimens of similar dimensions which 
are presumably mature females. Pocock’s suggestion that females 
of this species may always be distinguished from those of C. nitel- 
linus by their larger size can no longer, therefore, be maintained. 
C. fimbriatus is represented in our collection by a single male 
from Hoshali in the Shimoga District of Mysore. C. hardwickit 
is represented by specimens from Dharhara (Monghyr District) 
and Sahibgunge in Bihar; from Chakardharpur (Singbhum Dis- 
trict) in Chota Nagpur; and from Gmatia (Birbhum District) and 
Murshidabad in Bengal. C. stridulans is represented by specimens 
from Punkabari at the foot of the Darjeeling Hills, and from 
Goalpara, Shamshernager (Sylhet), Silcuri (Cachar), Aideo' and 
Sibsagar in Assam. 
Subfamily DI PLURINAE. 
Group MACROTHELEAE. 
Genus Macrothele, Ausserer. 
Macrothele vidua, Simon. 
(Pl, xv, fig. 5). 
I have little hesitation in referring to this species specimens 
sent me by Dr. Sutherland from Kalimpong. The species was 
described by Simon (1906, p. 306) from the ‘‘ bas plateaux de 
’Himalaya’’; and the only way in which our specimens appear to 
differ from it is in the armature of the anterior tarsi, which is 
present on the outer as well as on the inner side. 
! { do not know in which district Aideo is situated. 
