650 Longicornia Malayana. 



TestTceous brown ; head closely covered with yellow- 

 ish-buff hairs, except behind ; prothorax with a dense 

 gray tomentum, with a meJivin longitudinal line and two 

 spots at the base, glabrous, brown ; scutellum triangular, 

 covered with a gray tomentum ; elytra closely punc- 

 tured, furnished with long gray scattered decumbent 

 hairs, a black semilunar spot behind the middle of each, 

 the apex bordered with black ; body beneath, and legs, 

 reddish-brown, the femora darker, finely pubescent; 

 antennae pale ferruginous. 



Length 12 lines. 



Obriinj;. 



A small sub-family, limited, according to M. Lacor- 

 daire's arrangement, to three genera, Ohrium, Stcnho- 

 moJ'US, and J jonr/i onions ; " and recognizable by the length 

 and narrowness of the prothorax, the size of the first 

 abdominal segment, and the pecular habit of the 

 species.^' In the female, in all those species which are 

 known, the very large basal segment of the abdomen is 

 followed by segments which (although the second and 

 sometimes the last appear very nearly in the normal 

 state) are very short, more or less hairy, and depressed 

 or forming a shallow excavation. I am by no means 

 sure, howevei*, that this peculiar structure is confined to 

 the females, at least in all the species ; or that it is not 

 in some degree participated in by the males. But the 

 insects are very scarce in collections, and it is difficult 

 to ascertain the sexes. There are two genera in Mr. 

 Wallace's collection, one perfectl}^ new, and the repre- 

 sentative of the other 1 refer, with a slight shade of 

 doubt, owing to the uncertainty of the sex, to Ohrium. 



Genera. 



Prothorax cylindrical, unituberculate 



at the sides Ohrium, Latr. 



Prothorax subglobose in front, nar- 

 rowed behind, sides entire Iphra, n. g. 



Obrium. 



Ohrium, Latreille, in Cuvier, Rrgne Anim. v. 119; 

 Lacordaire, Gen. viii. 361. 



Caput breve ; mandibulis productis. Oculi promi- 

 nentes, profunde emarginati. Antcnnce corporo fere 



