DIORYCTUS. 177 



Body strongly rounded and convex. Head broad and flat ; 

 eyes widely separated, broadly euiarginate, emargiuation sub- 

 triangular ; antennae short, terminal six joints dilated. Thorax 

 transverse, basal margin strongly oblique, drawu out into a point 

 at middle, finely serrate. Scutellum invisible. Elytra with 

 strongly produced and angulate epipleural lobes extending nearly 

 to middle of length. Legs short and robust, tibiae dilated at apex. 

 Prosternum slightly transverse, subquadrate, sides strongly raised 

 into a ridge, diverging outwards anteriorly, middle with another 

 more blunt longitudinal elevation. First abdominal segment very 

 broad. 



A well-marked genus on account of the highly convex and 

 rounded shape, invisible scutellum, strong elytral lobes and struc- 

 ture of prosternum. Atropidius, Chap, does not seem to differ 

 from this genus, and the type species (A. iniprobus, Chap.) is very 

 inadequately described. 



302. Dioryctus porculus, Suffr. Linn. Ent. xiv, 1860, p. 5. 



"$. Black; basal joints of antennae flavous ; breast, coxae and 

 knees brown ; elytra reddish-brown, margins and apex black. 



" Head with lower portion and area near the eyes distinctly 

 punctured ; clypeus brown, feebly and sparingly punctate ; head 

 black at base ; eyes elongate, triangularly einarginate ; antennae 

 scarcely longer than the thorax, joints three to five each as long 

 as the second but thinner, terminal joints thickened, basal five 

 flavous, the rest black, the base of each piceous, furnished with 

 solitary long white hairs. Thorax short and broad, basal margin 

 produced into a point at middle, surface extremely finely and 

 remotely punctured. Scutellum scarcely visible. Elytra only a 

 little longer than broad, epipleural lobes strongly produced; sur- 

 face very finely and remotely punctured, outer interstice slightly 

 convex, the others flat, scarcely punctured, basal and lateral 

 margins black, latter gradually widened towards apex. Underside 

 strongly punctured anteriorly ; abdomen finely wrinkled, black. 



" Var. Entirely reddish-brown. 



" Length 3-4 mm." (Sufft'ian.) 



Hob. Ceylon. 



Described from a single female specimen, that had a large but 

 not deep fovea on the middle of apical abdominal segment. 



303. Dioryctus madurensis, sp. n. 



Black, with a slight greanish tint; basal joint of antenme 

 flavous. 



Head impunctate; antennae black, basal three joints flavous; 

 eyes subquadrately emarginate. Thorax more than twice as 

 broad as long, medial lobe acutely pointed, surface impunctate. 

 Elytra ovately subquadrate, slightly narrowed at apex ; epipleural 



VOL. I. K 



