Mr. F. P. Pascoe on the Genus Dicranocephalus. 25 
differ from the other two, and this I have dedicated to the generous 
donor. I will first give the diagnostic characters of the three forms, 
and then a comparative view of their differences, which will be more 
intelligible, I think, than a more minute description. 
Dicranocephalus Wallichii, Hope. 
D. griseo-pubescens; prothorace lato, turgido, carinis duabus, medio, 
elongatis; elytris breviter subquadratis. 
Hab. Nepaul. 
Dicranocephalus Bowringit. 
D. griseo-pubescens; prothorace-modice convexo, carinis duabus, medio, 
distinctis, brevibus ; elytris angulo humerali triangulari-impresso. 
Hab, North China. 
Dicranocephalus Adamsii. 
D. griseo-pubescens; prothorace modice convexo, carinis duabus, medio, 
parum obsoletis; elytris angulo humerali rotundato, haud impresso. 
Hab. Corea. 
The first, D. Wallichii, is a very much broader insect; the pro- 
thorax very convex, and swollen anteriorly, and, if viewed in profile, 
presenting a very considerable curve,—the two carine on its disk 
distinctly raised, narrowly and strongly defined, and, from the curve, 
appearing much longer; the elytra are broader and more quadrate, 
that is, less narrowed behind; and the tarsi are testaceous yellow, 
ringed with black. 
The second, D. Bowringii, has also the tarsi coloured in the same 
way, and the carine on the prothorax are equally well defined, 
although shorter; but the other characters present a marked contrast 
to the above. 
The third, D. Adamsii, has the tarsi entirely black ; and the carinze 
have nearly disappeared, leaving only two broad marks, which 
gradually shade off on each side, but are tolerably distinct in the 
middle, owing fo the sudden dip of the longitudinal cavity, which is 
alike common to all the forms ; and the humeral angle, which forms 
a sort of boss, is rounded, and without the triangular cavity of D. 
Bowringit. 
These are not all the differences between the two last forms. D. 
Adamsii has the basal joint of the anterior tarsus not longer than 
the second, and the intermediate and posterior tibize are much shorter 
than the corresponding parts in D. Bowringii; in the former the 
