182 
CHItYSOMELIDiE. 
high angular ridge ; inesosternum with a similar but less high 
ridge on each side, all the ridges piceous black. 
6 . 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. 
Bather broad and flat. Head black, finely and closety 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 impunctate, 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, puncturation 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 even width, not 
quite extending to the lateral margins. Prosternum subquadrate, 
its lateral margins raised. 
Length mm. 
Hab. India. Type in Coll. Jacoby. 
Fig. 71 . — Dioryctus 
bifasciatus. 
Genus CffiNOBIUS. 
Coenobius, Suffr, Linn. Ent. xi, 1857, p. <31 ; Chapuis , Gen. Col. x, 
1874, p. 177. 
Type, C. triangulum, Suffr., from Africa. 
Jtange. 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 
