88 



Memoirs of the Indian Museum. 



[Vol. VII, 



Ophrygonius aequalis, n. sp. 



Fig. XI, 1. 



A number of specimens from Chapa, Tonkin, have been sent by M. Vitalis de Salvaza. 



They vary from 27-3-31-6 mm. in length, and differ from 0. minor only in their larger size, 



in having only four antennal lamellae pubescent, in having the upper tooth of both 



mandibles well developed, in having the left outer tubercle still more nearly identical in 



Fig. XI. 



1. Ophrygonius aequalis, Gravely, part of 

 upper surface of head x 4. 



2. Ophrygonius javanus, Gravely, part of 

 upper surface of head x 4. 



3. Ophrygonius javanus, Gravely, left mandible 

 from without, highly magnified. 



4. Aceraius lamellidens, Gravely, left mandible 

 from without, highly magnified. 



size and form with the right, in having the frontal area shorter and distinctly transverse, 

 and in having the punctures on the sides of the pronotum densely clustered in and 

 confined to the scars, instead of very thinly scattered over a slightly more extended area. 



Ophrygonius javensis, n. sp. 



Fig. XI, 2-3. 

 One specimen from Boeloe Lawang, Pasoeroean, Java. Length 26 mm. Closely allied 

 to 0. minor, from which it differs only in having somewhat better developed upper teeth, 

 and in having the punctures and hair on the elytra confined to the ninth and extreme 

 hinder end of the seventh ribs, instead of over the whole of these two ribs. 



Ophrygonius aequidens (Gravely). 



Aceraius aequidens, Gravely, 1914c, p. 240, text-fig. 4E., p. 234. 



Six specimens from Mt. Kinabalu. Length 27-31 mm. 



The species of Ophrygonius as re-defined in the present paper may be recognized as- 

 follows : — 



r The antennal lamellae short and stout ; the anterior marginal 



depressions of the mentum quite small ; the sides of the 



elytra hairy . . . . . . . . . . 0. cantori, p. 86. 



The antennal lamellae long and slender ; or, the anterior 



marginal depressions of the mentum very large ; or, the sides 



of the elytra hairy . . . . . . . . . . . . 2. 



The antennal lamellae long and slender . . . . . . . . 3. 



The antennal lamellae short and stout . . . . . . . . 5. 



The tips of the first two lamellae not falling in line with those 



of the last four when the antenna is furled ; the anterior 



marginal depressions of the mentum quite small ; the sides 



of the elytra hairless . . . . . . . . 0. birmanicus, p. 87. 



The tips of all six lamellae forming a straight line when the 



antenna is furled ; or the sides of the elytra hairless. The 



anterior marginal depressions of the mentum usually large . . . . 4^ 



U 



