190 



KINCAID 



Under the circumstances, the writer feels that the following 

 paper will not be unwelcome, although it may be imperfect in 

 some respects, owing to the fact that no comparison has been 

 possible, in the majority of cases, with closely related forms. 



The species dealt with in this paper are as follows : 



Carabus truncaticollis Fisch. 

 Dytiscus dauricus Gebler. 

 Agabus tristis Aube. 

 Byrrhus fasciatus Fabr. 

 Hypnoides musculus Esch. 

 Cryptohypmts littoralis Esch. 

 Leptalia macilenta Mann. 

 Chrysomela subsulcata Mann. 

 Lepidophorus lineaticollis Kirby. 



CARABUS TRUNCATICOLLIS Fisch. 

 [Plate XXII.] 



Larva entirely jet black except the areas between the schlerites on 

 the ventral surface, surface shining, delicately reticulate, five times as 

 long as broad, subcylindrical, tapering slightly at either end, strongly 

 convex above, flattened below. Length 20 mm. 



Head broader than long, as wide as the anterior margin of prono- 

 tum ; frontal sulci strong and broad, surrounding the epistoma ; me- 

 dian area of epistoma broad, convex, a little depressed in the center, 

 lateral areas bent obliquely upward; frontal angles well defined, sub- 

 rectangular, broader by one-third than the clypeus but not exceeding 

 the latter, projecting obliquely upwards, apex rounded, outer margin 

 below apex sinuate, anterior margin arcuate ; incisure between angles 

 and clypeus broad and rounded. Clypeus subtriangular in form, 

 transversely ridged on posterior margin, deeply foveate in the center, 

 the fovea bounded on each side by a strong oblique ridge ; anterior 

 margin strongly produced, horizontal, quadridentate, the teeth stout, 

 sharp, directed forward, the middle pair the larger and projecting 

 considerably beyond the lateral teeth but not exceeding the frontal 

 angles of the head. Antennae as long as the mandibles, four-jointed, 

 basal joint subglobular ; second more elongate, slightly enlarged 

 towards tip ; third as long as second, more slender, with a few 

 hairs at apex; fourth one-half as long as third, slender, oval. Ocelli 

 six, arranged on the perimeter of a well-defined, transversely-oval 

 tubercle, situated just posterior to the antennae. Mandibles stout, 



