18 HETEROMEUA. [Tenebfio. 



cognized by its very dull upper surface, and the very close sculpture, 

 which on the elytra is almost coriaceous ; the antennas, moreover, 

 have the third joint longer than in T. molitor, double as long as the 

 fourth, and the striae on the elytra are much more indistinct ; in the 

 male the tibiae are moderately curved, but not so strongly as in the last- 

 mentioned species. L. 12-16 mm. 



In old flour, &c. ; probably an introduced species ; not uncommon in some locali- 

 ties, but of much rarer occurrence than T. molitor ; London district, common 

 (Champion); Whitstable; Dover; Hampshire; Devon; Birmingham; Carlisle; 

 Northumbeiland and Durham district; Scotland, Forth district, Edinburgh ; Ireland, 

 Dublin; it occurs most likely in all our large towns, but I have no record from 

 Liverpool or Manchester, although T. molitor appears to be general. 



ULOMINA. 



This tribe is closely allied to the Tenebrionina, but differs in having 

 the anterior coxae subtransverse, the intermediate coxae without tro- 

 chantin, and the third joint of the antennae short ; the head is, as a 

 rule, received into the thorax as far as the eyes ; the front is dilated ; 

 the antennae are 11-jointed, and are more or less thickened ; the epiplcurae 

 of the elytra are narrow ; the scutellum is usually more or less trian- 

 gular ; the tarsi have the last joint elongated about as long as the first, 

 and are pubescent beneath ; sixteen genera belonging to the tribe are 

 found in Europe, one of which, Latheticus, is, however, an evident 

 importation ; of these six occur in Britain ; Thomson separates off 

 the genus Hypophlceus, Hellw. (Corticeug, Pill.), as a separate tribe, 

 Hypophlceina, on the ground that the pygidium is exposed and the 

 scutellum transverse ; in Palorus, however, and some of the other genera 

 the pygidium is not quite covered. 



I. Antennae longer than head. 



i. Eyes more or less strongly divided. 



1. Thorax strongly transverse; form oval or oblong 



oval, convex AiPHiTomus, Steph. 



2. Thorax not, or only slightly, transverse ; form elon- 

 gate-oblong, more or less depressed or subcylin- 



drical. 



A. Mandibles of male produced into a conspicuous 



horn GNATHOCERUS, Tfiunl. 



B. Mandibles of male not produced into a horn . . TEIBOLIUM, McL, 

 ii. Eyes entire, or very slightly emarginate. 



1. Elytra not truncate at apex, almost completely cover- 

 ing pygidium ... PALOEtTS, Duv. 



2. Elytra truncate at apex, leaving the pygidium 



exposed HYPOPHLCEUS, Helltv. 



(Corticeus, Filler.) 



II. Antennae very short, shorter than head LATHETICUS, Wat. 



ALPHITOBIUS, Stephens. 

 The members of this genus are oval or oblong-oval insects, and are 



