108 



Memoirs of the Indian Museum. 



[Vol. VII, 



scars on the mentum ; in having the frontal ridges more or less obsolete behind instead of in 

 front of the inner tubercles ; in the deep concavity between the outer tubercle and the 

 anterior end of the supraorbital ridge of the left or of both sides of the head ; in having 

 the right outer tubercle about as long as the left although more slender ; in having no 

 distinct median groove on the pronotum ; in usually having punctures on the posterior 

 intermediate areas of the metasternum ; and in having the dorsal grooves of the elytra 

 as distinctly punctured as the lateral ones. The elytra are not united in either species. 



Genus GONATAS, Kaup, 187 1, p. 50. 



Inch Omegarius+ ? Tatius, Kuwert, 1896, p. 229. 

 Type. Passalus naviculator, Percheron, 1844, pp. 1-2, pi. cxxxiv, fig. 1. 



Gonatas minimus (Kuwert). 



PL I. 



Omegarius minimus, Kuwert, 1898, p. 313. 



Omegarius minimus, Gravely, 1913, pp. 110-111, text-fig. 3A. 



Three specimens from New Brittain, of which two are from Herbertshöhe ; one said 

 to be from Australia and one without locality record. Length 20-25 mm. 



Gonatas pumilio, Kaup. 



Aceraius pumilio, Kaup, 1868&, p. 6. 



Gonatas pumilio, Kaup, 1871, p. 50. 



Omegarius pumilio, Gravely, 1913, p. 112, text-fig. 3B. 



Several specimens from New Guinea (Torres Straits, Fly River, Kapaur), Waigeu 

 Amboina (Leitimor), and Ceram (Honitetoe in the western, Wahaai in the northern, and 



Fig. XVI. 



Gonatas spp. ; menturn x 8. 



1. G. cetioides, Zang. 3. G. carolinensis, Gravely. 



2. G. tenimbrensis, Gravely. 4. G. minor, Gravely. 



5. G. naviculator (Percheron). 



Roemasosal-Pasania in the central parts of the island). Also one specimen said to come 

 from the Sulu Islands. Length 1 8* 5-23*0 mm. 



Gonatas cetioides, Zang. 

 Fig. XVI, 1. 



Gonatas cetioides, Zang, 1905a, p. 316. 



One specimen from Herbertshöhe, New Brittain. Length 25 mm. 

 The antennae resemble those of G. minimus, the mandibles those of G. pumilio. The 

 posterior margin of the mentum is very lightly curved as in both species, but the lateral 



