224 [October, 



Tribolioides, n. gen. 

 Head rather small, depressed, strongly constricted into a neck behind; 

 anterior margin broad, sinuate, meeting the lateral margin almost at right 

 angles; clypeal suture distinct, meeting the sides a little behind the anterior 

 angles; eyes large, roiind, and prominent, subentire ; antennae 11-jointed, 

 gradually thickened from the base to the last joint, 3rd joint slightly longer 

 than the 4th, and 4th than the 5th, joints 5-10 siabequal, about as long as 

 broad, last joint elongate ovate, subacuminate, as long as the two preceding 

 together ; protlioraa' depressed, siibqiiadrate, sharply and completely margined, 

 posterior margin very fine ; anterior angles rounded, posterior angles acute and 

 prominent ; elytra depressed on the disc, base slightly emarginate, with the 

 humeri prominent but rounded ; suture and three rounded cost* on each elytron 

 raised ; lerjs rather slender, tarsi apparently 4-jointed, the iDcnultimate joint 

 produced beneath. 



Type, Tenebrio ferrMcjineus, Fab. — Hab., Tropical Africa. 



Mr. Waterhouse omits to give the length of tlie specimen, which 

 is 5 mm., as against 3—4 mm. for cm^fanevm, Herbst. 



TriboUoides may be phiced tentatively near XenosceIi!<, Woll., as 

 suggested by Waterhouse, though the alliance is by no means close. 

 The head resembles that of the Tenebrionid genus Mesotretis, Bates, 

 though narrower, more depressed, and strongly constricted to form a 

 neck behind, and the eyes are much larger in proportion, l^eing sepai-ated 

 by a space scarcely double the width of one of them. The lamellate 

 production beneath of the penultimate tarsal joint is very peculiar. It 

 is to be hoped that additional examples of the insect may be found 

 amongst collections of Coleoptera from tropical Africa. 



To Mr. J. Hartley Durrant I must express my indebtedness for 

 the aid he has rendered in the preparation of these notes. Recognising 

 that the name " ferruginen, Fab.," could not logically be applied to 

 this species, Mr. Durrant asked me to determine definitely the correct 

 name of this insect for use in his recent publications in regard to the 

 Army Biscuit Enquiry. 

 September, 18th, 1913. 



NEW SPECIES OF 



COLEOPTERA ALLIED TO XANTHOLINUS OCHRACEUS, Gtll. 



BY NORMAN H. JOY, M.B.C.S., F.E.S. 



It is cjuite evident that under the name Xaniholinns ochracevs, 

 Gyll., we have confounded two very distinct species. One of these has 

 the last joint of the maxillary palpi small and conical, and the thorax 

 W'ith about 12 pinictures in the dorsal series, whereas in the other the 



