I9I4-] F. H. Gravely ; An Accoimt of the Oriental Passalidae. 207 



Comacupes masoni, Stoliczka. 

 PL xi, figs 4-4^. 



Regd. No. '^' {type') Johore, Malay Peninsula J. Wood-Mason. 



Description. — Length 30 mm. Labrum as in C. stoliczkae, but with anterior 

 margin slightly concave. Mandibles also as in C. stoliczkae. Mentum perhaps differ- 

 ing from that of that species in that the median keel is scarcely as high. Head 

 somewhat more finely punctured, otherwise similar; central tubercle quite as 

 prominent, not depressed at tip as in both C. stoliczkae and C. cavicornis, scarcely 

 excavate along middle-line, outline in side view straight (perhaps very faintly 

 convex) and horizontal above, oblique beneath. Pronotum with anterior angles a 

 little more prominent, sides slightly divergent behind ; enlarged areas of anterior 

 marginal groove rather abruptly terminated at their outer ends. Prothrorax ventrally 

 as in C. stoliczkae. Mesothorax, metastenium , elytra and legs also as in C. stoliczkae. 

 Second abdominal sternum strongly punctured throughout ; third with a few punc- 

 tures at each end; rest of lower surface of abdomen smooth and highly polished. 



Comacupes cylindraceus (Perty). 

 Pi. xi, figs. 5-6(? ; text- fig. 2. 



Regd. No. '^ '^ Sinkep Island Moti Ram. 



-^ Klingkang, Borneo Sarawak Museum. 



Also specimens from the Larut Hills in the British Museum, from Deli (Sumatra) 

 in the Hamburg Museum, and from Padang and St. Rambe (Sumatra) in the 

 Deutsches Entomologishes Museum. 



Under this name, as explained above (p. 206), I include, of the two forms 

 included under it by Kaup, only the " typical " one. But I 

 also include everything referred by Zang to C. masoni and 

 C. cormocerits ; and the series of specimens before me shows 

 the species to be so variable that I am inclined to think it 



possible that C. masoni, Stoliczka, may ultimately have to 

 Text figuer 2. , ^ 1 .^ -.l 1 



„ J , , .be referred to it also. 



Head of a form ot ^.„ . ^, ,. / 



C. cylindraceus, from Description. — Length 24-26 mm. Diflers from C . stoliczkae 



the left side, x 4. ^^^ (- j^^soni only in the form of the central tubercle of the 



head ; this is somewhat less prominent in front as seen from 

 the side, and more or less vertically truncate; its anterior margin may be straight 

 or markedly concave, and either the upper or the lower angle may project some- 

 what — but never very much — beyond the other (see pi. xi, figs. 5^7 and 6a, and text- 



' This specimen appears to have been entered in our register originally under the No. " ,-' , to 

 have lost the label bearing this number, and then to have been entered again under another number. 



