1916. | F. H. GRAvELY : Lignicolous Beetle-Larvae. 149 
males and females which formed part of the material from which 
the species was originally described (Rec. Ind. Mus., XI, pp. 427-429, 
pl. xxix, fig. 7). They are curved and more or less clavate, but 
are slenderer than the larvae of the preceding species. 
The head closely resembles that of the preceding species but 
bears fewer hairs, and has a somewhat narrower clypeus and a 
labrum with less distinct anterior marginal depressions. 
The second of the two long joints of the antennae is some- 
what shorter than in the preceding species; it is much, instead of 
scarcely, shorter than the first. The right mandible has only two 
terminal teeth as in Platycerus caraboides and Sinodendron cylindn- 
cum, the ventral being much the larger of the two; but beneath 
these a rudiment of the third terminal tooth is recognizable. The 
left mandible has three large teeth arranged like the apical teeth 
of Dorcus parallepopidedus, with a small denticle a little behind 
each of the two outermost of the three. Except for the presence 
of the small dorsal denticle the termination of this mandible is 
also very like that of Stnodendron cylindricum. The molar teeth 
of both mandibles closely resemble those of this species. The 
maxillae and labium resemble those of Aegus roepstorffi—the 
former at least are very like those of Dorcus and Sinodendron. 
The legs resemble those of Aegus roepstorffi in general structure, 
but are without the ventral projections and spiniferous tubercles 
found on the second, third and fourth joints in that species. The 
stridulatory tubercles on the coxae of the second legs are all 
small and scattered. The corresponding ridges on the second 
joint of the third legs are weak. 
The stigmata and the integuments of tle thorax and abdomen 
resemble those of the preceding species. 
The only larva previously described belonging to the subfamily 
Figulinae is that of Figulus striatus. Unfortunately I have not 
been able to refer to this description. Of the larvae described by 
Schiedte, the nearest to that of Nigidius dawnae appears to be 
Sinodendron cylindricum, but the latter has not got transversely 
striate stigmata like those of Dorcus, etc., in general form it is 
not even faintly clavate, and its stridulating organs appear to be 
slightly different. 
Nigidius impressicollis, Boileau. 
(Pl. xxi, figs. 14-17.) 
Locality.—Assam: Maflong, Khasi Hills, 5900 ft. (in damp and 
thoroughly decayed wood). 
Two larvae, about 27 and 31 mm. long respectively, found in 
association with adults of various sizes. They are scarcely as 
slender as larvae of N. dawnae, but are much slenderer than larvae 
of Aegus roepstorffi. 
The head is very like that of A. roepstorffi but has a some- 
what shorter clypeus and less distinct anterior marginal depres- 
sions. The antennae resemble those of N. dawnae. The man- 
