362 Records of the Indian Museum. [Vor. XI, 
papillae, and appears to have shorter mandibles as these do not 
press the maxillae downwards and so are completely hidden. It 
differs greatly in this way from the larvaé of Lyropaeus biguttatus, 
and need not be further discussed here. 
Another South Indian species is represented in our collection 
by a dried specimen whose head, prothorax and legs are miss- 
ing. It is transitional in character between the two preceding, 
resembling the former in colour, but having a double row of 
rudimentary tubercles down the back, and rudimentary tubercles 
on the abdominal epimera and episterna, It may represent a 
further stage in the development of that species; or it may be 
more nearly allied to a series of smaller larvae from Naduvotam 
(Nilgiris, 7000 ft.) which are preserved in the collection of the 
Agricultural Research Institute, Pusa, whence two specimens have 
been presented to our collection. It closely . resembles these 
larvae in structure, but in them the yellow on the lower surface is 
confined to the anterior part and lateral angles of the prothorax, 
the anterior parts of the mesosterum and metasternum near the 
middle line, the abdominal sterna, and the bases of the legs. 
The occurrence in the Pusa collection of a male insect 
from Naduvotam, belonging to the Lyropaeus-like genus Calo- 
chromus, suggested the possibility that this might be an adult of 
the species to which the ‘‘ Trilobite Larvae’’ from that locality 
belonged. Calochromus is placed by Bourgeois (Ann. Soc. Ent. Fr. 
XI, 1891, p. 348) in the Lygistopterus group of genera, which 
immediately precedes in his system the Dilophotes group contain- 
ing Lyropaeus!; and the larva of C. melanurus which has been 
briefly described by Shelford (Rep. Brit. Ass., Tg01, p. 690) ap- 
pears to be of the “‘ Trilobite”? type. Males of Calochromus are 
much more numerous than females among the few specimens I 
have examined; but this may be due to their being more active, 
and females undoubtedly occur in some species. It is, however, 
possible, that some species of the genus may have large larviform 
females, or even that winged and larviform females may occur 
together in some or all species. 
Our collection contains, in addition to the above South 
Indian specimens of the Lyropaecus or broad type of ‘* Trilobite 
Larva’’, specimens of this type from the following localities :— 
Ceylon: Peradeniya (? two species”). 
Bengal: Chittagong—Rangamatti. 
Burma: Sadon (Myitkyina Dist.); Pegu. 
Malay Peninsula: Lankawi; Singapore. 
Philippines. 
1 The genera Calochromus and Lyropaeus are, however, placed almost at 
opposite ends of the family by Westwood (7rans. Ent. Soc. London, 1878, 
pp. 96 and 104-5, and ‘‘ Illustrations of Typical Specimens of Coleoptera in the 
collection of the British Museum, Pt. I, Lycidae '’, London, 1879, pp. 2-8 and 78). 
2 In one of these, represented by a single small specimen, the metathoracic 
stigmata are absent, and the prolongations of the angles of the abdominal terga 
and of other plates are very feebly developed. 
