new Species of Histeridse. 53 



rupfed. The punctuation of the sterna of tuberculalus is 

 obsolete. 



This is the fifth species of the genus known, and it is 

 probable that their habits are peculiar and different to those 

 of Omalodes, as the latter are generally captured in numbers 

 and those of Gornillas in single examples only. 



Hab. Matto Grosso, Brazil. 



Contfpus somaliensis, sp. n. 



Ovalis, convexiusoulus, niger, nitidus, mandibulis planis marginatis ; 

 fronte stria integra in medio angulata ; pronoto stria interna 

 postice flexuosa ; elytris striis subhumerali interna integra, 

 externa basi dimidiata, dorsahbus 1-4 integris parallelis, 5 dimi- 

 diata, suturali antice abbreviata ; propygidio utrinque grosso 

 punctato; pygidio sat dense punctulato ; prosterno bistriato ; 

 mesosterno stria marginali interrupta ; tibiis anticis 4-dentatis. 



L. 6f mm. 



Oval, rather convex, black and shining ; the head, 

 mandibles flat above and marginate on both sides, frontal 

 stria complete and angulate in the middle ; the thorax, inner 

 stria flexuous towards the base, outer stria terminating before 

 the angle; the elytra, striae, outer humeral dimidiate and 

 basal, inner complete, 1-4 dorsal complete and parallel to 

 each other, 5 short and apical, sutural as long again as the 

 fifth and reaching beyond the middle ; the propygidium 

 lightly pointed in the middle and somewhat coarsely on 

 either side ; the pygidium closely and evenly punctured ; 

 the presternum is bistriate, striae widening out between the 

 coxaj and ending there, parallel and close anteriorly ; the 

 mesoitenmm is emarginate, and the stria is interrupted at the 

 emargination ; the anterior tibiae are 4-dentate. 



C. flexuosus, Sch., oblongus, and immarginatus, Lew., have 

 the dorsal striae widened out somewhat at the base; in the 

 above the striae are parallel to each other like those shown in 

 Marseul's figure for digit atus. 



Hab. Dire Daona, Somaliland, and Ghindo, Erythraea. 



ExORHABDUS, gen. nov. 



Body oval and a little convex, frontal stria complete, 

 thorax with two well-marked lateral striae, antennal fossettes 

 are narrow longitudinal luniform excavations along the edge 

 of the thorax immediately behind the angle, elytral sub- 

 humeral stria strong and complete and similar to the dorsal 

 first stria (Paykull considered that afer had nine striae), 



