182 CHltYSOMELIDJE. 



high angular ridge ; rnesosternum with a similar but less high 

 ridge on each side, all the ridges piceous black. 



c? . Last abdominal segment evenly convex, preceding segment 

 strongly narrowed at middle. 



Length 3 mm. 



Hab. Sikhim. 



313- Dioryctus bifasciatus, sp. n. 



Base of head, breast and abdomen black ; thorax fulvous, middle 

 of disc spotted with black ; elytra fulvous, a sutural band strongly 

 constricted at middle and another regular broad band near margins, 

 black ; legs fulvous. 



liather broad and flat. Head black, finely and closely punctured ; 

 clypeus and labrum flavous; eyes widely separated, moderately 

 deeply triangularly notched ; antennae 

 black, extending to base of thorax only, 

 the basal five joints flavous, terminal 

 joints slightly widened but longer than 

 broad. Thorax very short, nearly three 

 times wider than long, strongly narrowed 

 in front, lateral margins nearly straight; 

 surface im punctate, very shining, the 

 middle with an ill-defined, black, longi- 

 tudinal, partly divided band, posterior 

 margin strongly pointed and produced 

 at middle. Scutellum invisible from 

 above. Elytra with strongly produced 

 lateral lobes, punctu ration only visible 

 under a strong lens, entirely absent at sides and apex ; the 

 sutural band triangularly widened at base, but to a much less 

 extent behind the middle, the lateral band of oven width, not 

 quite extending to the lateral margins. Prosternum subquadrate, 

 its lateral margins raised. 

 Length 2 4 mm. 

 Hab. India. Type in Coll. Jacoby. 



Genus CffiNOBIUS. 



Coenobius. Suffr. Linn. Ent. xi. 1857. p. 01 ; Chamtis. Gen. Col. x, 

 1874, p. 177. 



Type, 0. triangulum, Suffr., from Africa. 



Range. Africa and Asia. 



Small species. Eyes contiguous at vertex of head, deeply emar- 

 ginate ; antennae short, the last six joints dilated. Thorax gene- 

 rally narrowed in front, the posterior margin formed into a ridge, 

 often with a row of deep punctures ; medial lobe short, bluntly 



