^ 



1918.] F. H. Gravely: Passalidae of the World. 21 



Genus CERACUPES, Kaup, 187 1, p. 16. 

 Type, Passalus fronticomis, Westwood, 1842, pp. 124-125. 



Ceracupes fronticomis (Westwood). 



Passalus fronticomis, Westwood, 1842, pp. 124-125. 

 Ceracupes fronticomis, Gravely, 1914c, p. 212, pi. xi, fig. 12. 



Three specimens from 5,000-7,000 ft., Ruby Mines District of Upper Burma ; two from 

 Renong, Siam, and several without recorded locality. M. Vitalis de Salvaza has sent for 

 examination a specimen from ca. 4,000 ft., Chapa, near Lao Kay, Ht. Tonkin ; and Mr. J. 

 Coggin Brown has presented us with a specimen from Loi Tawng Kyaw, Tawng Peng State, 

 N. Shan States, Upper Burma, 5,500-7,000 ft. ; and one from Man Pat, Mongmit State, 

 5,200 ft., Ruby Mines District, Upper Burma. 



Length 20-23 mm - 



This species is less distinct from C. austeni and C. arrowi than I supposed when drawing 

 up the key to the species (1914c, p. 319), the shape of the central tubercle being very 

 variable. The distinction given in that key between C. austeni and the present species 

 appears to hold good, though the distal bifurcation of the central tubercle of the latter is 

 sometimes very weak. The most distinctive difference between C. arrowi and the present 

 species is found in the elytra, whose grooves are deeply impressed and coarsely punctured 

 in the latter, but shallow and less strongly punctured in the former. 



The species of Ceracupes may be identified thus : — 



The grooves of the elytra, and their punctures, somewhat 

 ! shallow . . . . . . . . . . G. arrowi, Heller. 



The grooves of the elytra, and their punctures, very deep . . . . . . 2. 



The apex of the horn formed by the fusion of the central 

 tubercle with the anterior margin of the head more or less 

 distinctly bifid . . . . . . . . 0. fronticomis, p. 21. 



The apex of this horn acute . . . . C. austeni, Stoliczka. 



.2 



Genus CYLINDROCAULUS, Fairmaire, 1880, p. 164. 

 Incl. Auritulus, Zang, 1905. 



Type, Cylindrocaulus bucerus, Fairmaire, 1880, p. 164. 



The species of this genus may be identified thus : — 



The front coxae almost contiguous ; the canthus extending 



about half way across the eye ; the supra-orbital tubercles 



flattened, expanded at the apex, truncate . . . . C. paialis (Lewis). 



The front coxae widely separated ; the canthus extending gall 



the way across the eye ; the supra-orbital tubercles slender 



and pointed . . . . . . . . . . C. bucerus, Fairmaire. 



