248 Mr. G. R. Waterhouse on some neiv Coleoptera 



form of a sharply indented line ; the surface is convex, punctured and 

 glossy, and has a longitudinal line on the basal half ; in front of the 

 eye is an oblong fovea, broad near the eye and pointed in front; this 

 fovea is bounded above and below by a ridge, the lower ridge forming 

 the upper boundary of the groove for the antenna. The male Ap. 

 geniculatus has the terminal segment of the abdomen semicircular and 

 punctured, and this is preceded by two very short transverse seg- 

 ments as usual ; but in the female the hindermost of these two trans- 

 verse segments undergoes a singular modification in form, being 

 produced posteriorly so as completely to hide the terminal segment, 

 and having a deep emarginalion, and terminating in two spines be- 

 hind ; the last segment is smooth and very glossy. In one other spe- 

 cies of Apocyrtits {Ap. inflatus), I have found the same sexual pecu- 

 liarities in the abdominal segments. 



Apocyrtus rufipes. 

 Ap. niger, nitidus ; pedibus splendide rufis, genibus taisisque nigris ; capite 



punctato; rostro crebre punctato ; thorace globoso, antice posticeque 



truncate, tuberculis rotundatis crebre obsito: elytris rugoso-punctatis. 



Long. Corp. 5^ — 4^ b'n. 

 Mas : thorace valde globoso ; elytris thorace angustioribus, postice rotmida- 



tis ; rostro supra concavo. 

 Foemliia : elytris thorace latioribus, subovatis, ad apicem spinis duabus ar- 



niatis ; rostro supra convexiusculo. 



The male of this species is remarkable for the large size and nearly 

 spherical form of its thorax. The head has some scattered punc- 

 tures, and a distinct longitudinal groove between the eyes ; the ros- 

 trum is thickly punctured, and its upper surface presents a large, 

 but somewhat shallow concavity ; this occupies the whole width of 

 the rostrum in front, between the antennse, but becomes gradually 

 narrower towards the transverse depression at the base ; on each 

 side, in front of the eyes, are two foveee, one above the other ; the 

 upper one is the largest, and joins the transverse groove at the base 

 of the rostrum. The legs are of a very bright red colour ; the tip of 

 the femora, the coxae, apex of the tibiae, and the tarsi are black. The 

 thorax is thickly covered with glossy, rounded tubercles, and has a 

 slight longitudinal channel. The elytra are scarcely dilated in the 

 middle, convex, and distinctly punctured ; the punctures are con- 

 fluent, and have a tendency to arrange themselves in striae. The 

 terminal segment of the abdomen is semicircular and coarsely punc- 

 tured. 



An insect agreeing with the above in all essential characters, and 

 which I feel no doubt is the female, is remarkable for the possession 

 of two spines at the apex of the elytra, — a character which I have 

 found in a female of another species of the present genus. It differs, 

 moreover, in having the thorax proportionately smaller, and the ely- 

 tra rather broader than the thorax, being more dilated in the mid- 

 dle. They have a small subapical hump on the suture, out of which 

 springs a brush of hairs, as in the female Ap. geniculatus and some 

 others of the genus, and the terminal segment of the abdomen is 

 conical and presents numerous irregular rugae. The rostrum, instead 



