18 HETEROMERA., [ Tenebrio. 
cognized by its very dull upper surface, and the very close sculpture, 
which on the elytra is almost coriaceous; the antennew, moreover, 
have the third joint Jonger than in 7. molitor, double as long as the 
fourth, and the stria on the elytra are much more indistinct; in the 
male the tibiz 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 Z. molitor; London district, common 
(Champion); Whitstable; Dover; Hampshire; Devon; Birmingham; Carlisle; 
Northumberland 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 coxe subtransverse, the intermediate coxze without tro- 
chantin, and the third joint of the antenne short; the head is, as a 
rule, received into the thorax as far as the eyes; the front is dilated ; 
the antenne are 11-jointed, and are more or less thickened ; the epipleure 
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 
fuund in Europe, one of which, Latheticus, is, however, an evident 
importation ; of these six occur in Britain; Thomson separates off 
the genus Hypophleus, Hellw. (Corticeus, Pill.), as a separate tribe, 
Hypophleina, 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, Antenne longer than head. 
i. Eyes more or less strongly divided. 
1. Thorax strongly transverse; form oval or oblong 
oval, convex . ALPHITOBIUS, Steph. 
2, Thorax not, or only slightly, transver Se ; ; form elon- 
gate-oblong, more or less depressed or subcylin- 
drical. 
A. Mandibles of male sige into a laa Wea tee 
horny «=; % . . GNATHOCERUS, Thunb. 
B. Mandibles of male not pr oduced intoa horn . . TRiBoLIUM, MeL. 
i. Eyes entire, or very slightly emarginate. 
ee Elytra not truncate at cai almost completely cover- 
ing pygidium . . . PaLorus, Duv. 
2. Elytra truncate at apex, leaving the pygidium 
CXPOSed = G50 we nye i © >» + oe + JYROPHLGGUS, Helle. 
(Corticeus, Piller.) 
II. Antenne very short, shorter than head . . . . . . Larnericus, Wat. 
ALPHITOBIUS, Stephens. 
The members of this genus are oval or oblong-oval insects, and are 
