neiv genera and species of Tenchrioniclcz, ^^c. 281 



slightly narrowing to the front from behind the middle ; 

 posteriorly more gradually curvedly contracted than in 

 the two preceding species ; base a little wider than apex, 

 truncated, with an impression at the middle within the 

 margin in front of the scutellum ; lateral margins very 

 faint except at the base ; front angles very small and 

 indistinct ; elytra gently convex, as wide at base as base 

 of prothorax ; base but little emarginate, entirely keeled ; 

 humeral angle not prominent ; sides channelled for a 

 short distance from the humeral angle ; strongly sinuately 

 narrowed from behind the middle to the apex, Avhich 

 is strongly divaricate, the mucro being short, broadly 

 rounded at a])ex, and distinctly impressed above ; pro- 

 sternum broadly and rather strongly impressed down the 

 niiddle between the coxre ; antennas and legs pitchy 

 brown ; the former elongate, flattened, perfoliate ; joint 3 

 produced (but rounded) within at the apex, 4 — 6 broadly 

 produced and angulate within, 7 less strongly so than 

 4 — 6 ; tibiae, especially the front and hind, strongly thick- 

 ened at the apex. 



5 . Antennas shorter ; joints 3 — 7 obconic, scarcely per- 

 foliate nor flattened ; the tibias but little thickened at the 

 apex. 



Long. 9^ lin. 



Fianarantsoa. 



Doliclioderus heterocerus, n. sp. 



$ . Near the preceding ; head and prothorax less obscure, 

 the elytra much less nitid ; head more narroAved in front 

 of the eyes, more sinuately truncated in front; antennary 

 orbits more convex ; sides of prothorax more parallel ; 

 elytra much more convex ; the mucro shorter, less divari- 

 cate, scarcely impressed above; legs and antennas of a 

 clearer brown; the latter still more flattened, more per- 

 foliate, the middle joints more produced on the inner side; 

 3 elongate securiform ; 4 — 6 approaching wedge-shaped; 

 prosternum irregularly sulcated between the coxa). 



? . Antennas and tibias as in the preceding. 



Long. 8—10 lin. 



Fianarantsoa. 



Doliclioderus lucifugus, n. sp. 



$, Head and prothorax dull black; obscurely (some- 

 times obsoletely) punctured, the former a little narrowed 



