556 Descriptive Catalogue '1896. 



Gen. DEIMOSTOMA, Dej., 



Spec. Col., v., p. 745. 



Mentum short, with a sharp median tooth, lateral lobes sharp at 

 tip ; ligula elongato-quadrate, paraglossse very slender and much 

 longer ; last joint of palpi fusiform and sharp at tip, the maxillary 

 one swollen inwardly ; maxillae not hooked, ciliate inwardly, and 

 with three strong spines ; labrum transverse ; mandibles very long, 

 falcate, and sharp ; eyes large ; head not narrowed behind, and 

 having a deep long frontal groove on each side ; antennge short, 

 joints subquadrate, gradually broadening from the fifth to the 

 terminal one, which is the widest of all ; prothorax not much 

 ampliated laterally and slightly sinuate near base ; elytra sub- 

 elongate, parallel, striate, without any puncture on the third interval ; 

 legs short, robust, tibiae grooved inwardly, tarsi not gi^ooved, joints 

 of anterior ones in the male not very broadly dilated. 



The general facies is shorter and more quadrate than in Abacetus, 

 and the species included in the genus are easily distinguished by the 

 short antennae and the subquadrate shape of the joints. 



Hab. The genus is represented in Africa (Guinea, Senegal, Sierra 

 Leone), Madagascar, Ceylon, China, New Zealand, Australia, and 

 North and South America. 



Synopsis of Species. 

 Prothorax as long as broad, narrowed slightly laterally behind and 



subsinuate laticolU. 



Prothorax as long as broad, not sinuate laterally behind natalcnse. 



Prothorax broader than long, not sinuate laterally behind . . . . amaroidc. 



Deimostoma natalense. 



Piceous brown, shining; palpi, legs, labrum, the three basal joints 

 of antennae ferruginous, the other joints densely pubescent ; head 

 smooth, the frontal groove reaching from the clypeus to the median 

 part and slightly curved ; prothorax smooth, hardly ampliate 

 laterally, but a little narrower above the base than at the apex, and 

 not sinuate behind, posterior angle not projecting, median and 

 lateral grooves deep ; elytra parallel, slightly broader than the 

 prothorax, hardly sinuate behind and not convex, narrowly punctato- 

 striate, with the intervals narrow, smooth, and hardly convex. 

 Length 5 mm. ; width 2 mm. 



Hab. Natal (D'Urban). 



DlilMOSTOMA LATICOLLE, Boliem., 



Insect. Caffr., p. 176. 



Black, shining ; feniora, palpi, and the three basal joints of 

 antennae dark red ; tibiao and tarsi piceous black ; the other joints of 



