2o6 Memoirs of the Indian Museum. [A'oi,. Ill, 



Dcscripiion. — Length 2^-27 mm. Differs from C. cavicornis, s. str., only in having 

 the upper surface of the head entirely smooth, hairless, and unpunctured except right 

 at the back behind the supra-orbital ridges ; in having the central tubercle of the 

 head shorter and more abruptly truncate in front; in having somewhat wider enlarge- 

 ments of the anterior part of the marginal furrow of the pronotum ; and in having 

 the lateral and anterior intermediate areas of the metasternum more sparsely and less 

 extensively punctured behind. 



Comacupes stoliczkae, n. sp. 



PI. xi, figs. ^-^a. 

 Regil. Nu. "I^ '•'*'■' (/y/)c) Johore, Malay Peninsula J. Wood-Ma.son, etc. 



-^ Sinkep Island Moti Ram. 



This species is intermediate between C. cavicornis and C. niasoni \ but it closely 

 resembles C. cylindraceiis also, agreeing with it in every detail referred to by Kaup 

 in his monograph. Kaup notes, however, that he includes under the one name cylind- 

 raceus two forms differing considerably in the shape of the central tubercle, both of 

 which forms he figures; and I have little doubt that his " 2nd form" was in reality 

 the present species. Perty's original description and figure of C. cyhndraceus would 

 perhaps do almost equally well for either form ; but I think that these, and also those 

 subsequently given by Percheron, apply best to the form referred to by Kaup as the 

 typical one. As the present form differs considerably from this "typical" C. 

 cylindraceus in the shape of the central tubercle, I have no hesitation in regarding 

 it as a distinct species ; and I name it after Dr. Stoliczka in recognition of his valu- 

 able work on the Oriental species of Passalidae. 



Description. — Length 25-27 mm. Labrum often nearly as long as it is wide, 

 punctured, hairy, anterior margin approximately straight, angles strongly rounded, 

 sides straight and parallel. Mandibles as in C. cavicornis, the upper tooth even 

 more reduced. Head above and below also as in C. cavicornis in general shape, but 

 with the central tubercle more elevated (especially in front), much narrower, thickened 

 behind the apex, and simply rounded, not excavate, above; there is, moreover, 

 a pair of transverse ridges at the base of the central tubercle much as in Taeniocerus 

 bicanthatus, but more pronounced and covered like the rest of the head with a 

 coarse punctuation slightly finer and closer than that of Comacupes cavicornis. 

 Prothorax as in C. cavicornis, but with somewhat smaller scars, and still more hairy 

 sternum. Mesothorax also as in C. cavicornis. Metasternum differing from that of 

 C. cavicornis in that the punctuation is somewhat finer and closer, and extends 

 over the whole surface outside the central area. Abdominal sterna (? always) less 

 hairy than in that species. Posterior part of hind coxae punctured ; middle tibiae 

 armed with one spine about two-thirds of the way down ; hind tibiae similarly 

 armed, but with the spine usually very slightly smaller. Elytra sometimes with 

 some small punctures along the lower side of the anterior half of the tenth rib ; 

 otherwise as in C. cavicornis. 



