new genera and species of Tenehrionidoc, ^"c. 289 



of the aiiteniiaj are move coiitraclecl at the base, on the 

 inner side ; the sides of the prothorax are less strongly, 

 and more obliquely, contracted anteriorly, a little dilated 

 posteriorly, the margins less distinctly crenulated ; the 

 prosternal process is more convex, and is not pointed be- 

 hind ; the punctuation, &c. on the abdomen and flanks of 

 metasternura is stronger; the pro- and meta- sterna are 

 shining black, without any tinge of violet ; the femora are 

 bluish-black ; the tibite, tarsi and antenna} reddish-brown, 

 clearest on the former. In alternata the pro- and meta- 

 sterna are black, with distinct violet reflections; the femora 

 cyaneous, the tibia3 nearly of the same colour. 



The $ is narrower than the 2; joints 6 — 10 of the 

 antennre distinctly narrower ; the apical emargination of 

 the epistoma distinctly angulate ; the intervals on the 

 elytra more coarsely rugose, and the prosternal process 

 more lobiform, and obtuse, behind. 



Long. 10^ lin. 



Fianarantsoa. 



In the following three genera the eyes are more or less 

 depressed above, and are laterally very prominent ; the pro- 

 thorax strongly transverse and quadrate, the front angles 

 prominent ; and the epipleural fold of the elytra does not 

 extend beyond the level of the fourth ventral segment. 



AcTANORiE, nov. gen. 



Mentum trapezoidal, finely carinate down the median 

 line, anterior margin entire ; mandibles curved at the 

 outer side ; head sliort, front rapidly sloping to the epis- 

 toma; this latter broadly truncated in front, the suture an- 

 gulate, strongly impressed ; eyes a little depressed above ; 

 the antenna3 and palpi are wanting in the unique example 

 before me ; prothorax unequally convex ; apex subslnu- 

 ately emarglnate, front angles large and prominent but 

 obtuse ; all the margins rcflexed, the lateral irregularly 

 crenulated ; base feebly bisinuate, hind angles obtuse ; 

 sides very feebly rounded in the middle, sinuatcly con- 

 tracted at the base ; scutellum curviUnearly triangular ; 

 elytra considerably wider than prothorax ; strongly con- 

 vex, sides a little dilated behind, entirely margined and 

 reflexed ; apex (conjointly) narrowly rounded ; shoulders 

 broadly rounded, prominent ; the surface (excepting the 

 sutural region at the base) uneven by reason of numerous 

 large fovea3 ; prosternum strongly abbreviated before, and 



