148 Records of the Indian Museum, [Voy. XII, 
mandible there is one and in the left there are two smaller teeth on the 
dorsal margin behind these, asin Lucanus cervus' and Dorcus paral- 
lelopipedus. The molar tooth of the right mandible consists of a 
low anterior transverse ridge followed by a somewhat higher hol- 
lowed L-shaped cusp; that of the left mandible consists of a very 
strongly elevated anterior trarisverse ridge, longitudinally grooved 
in front and more elaborately marked behind, followed by a low 
hollowed cusp of considerable size. The maxillae resemble those 
of Dorcus parallelopipedus. As with the antennae I would regard 
the basal piece (“‘stipes palpiger”’ of Schipdte) as a basal joint. 
The labial palps are 2-jointed, the proximal joint being about as 
loag as broad, and the distal about three times as long as broad 
and about twice as long as the proximal. 
The legs resemble those of Dorcus parallelopipedus in structure 
and proportions except that each joint—judging from Schigdte’s 
figure of the third leg of that species—is slenderer, and that 
the stridulating joint of the third leg is more sharply pointed 
distally as in Platycerus caraboides The stridulating surface on 
the middle leg resembles that of the former species; the tubercles 
are very fine and closely set. The second, third and fourth. joints. 
of all legs, when not modified for stridulation, are thickened ven- 
trally near the distal end. The projections thus formed bear clus- 
ters of stout spiniferous tubercles and are strongest on the third 
joint of each, and especially of the second, leg. 
Only the thoracic and first two abdominal segments are dis- 
tinctly divided transversely by a groove above. All segments as 
far as the sixth abdominal are sparsely covered above with short 
hairs, and have a posterior line of long hairs. Further back the 
short hairs disappear, and from about this point backwards long 
hairs are found on the anterior as well as the posterior parts of 
each segment. Each segment up to and including the ninth abdo- 
minal bears a large tubercle on each side in the posterior angles of 
the tergum. The terminal segment resembles that of Dorcus paral- 
lelopipedus, as do also the stigmata. 
The larva of this species closely resembles that of its ally Dor- 
cus parallelopipedus , the chief differences being found in the struc- 
ture of the molar teeth and the greater slenderness of the legs. 
Nigidius dawnae, Gravely. 
(Pl. xxi, figs. 12-13.) 
Locality.—Tenasserim: near Sukli, eastern side of Dawna 
Hills, Amherst District, ca. 2200 ft. (in hard dry 
wood). 
Several larvae about 20-35 mm long (all but one of about 
the latter size) were found in association with the well developed 

1 Schipdte speaks of the right mandible as tridentate only in these species, 
but the extra denticle is clearly shown in the right mandible of the latter species, 
which he figures (loc. cit., pl. xvii, figs. 3 and 4). 
