LathruUina.] olavicornia. -"^ 



contains eight genera ; of these, however, Agclandia, Reittcr, cannot he 

 retained, and together Avith Langelandla must he either phiced with tlio 

 Colydiidje or formed into a new family ; the tribe, as far as our fauna 

 is concerned, consists of the ohl genus Lafhridius, which has, however, 

 been divided by Thomson into five genera; of these four arc here 

 retained. 



I. Thorax with two fine longitmliual keels on disc. 



i. Club of autenua3 not abrupt ; eyes nearly touchiug 



anterior angles of thorax ; temples very small . . . LatheidiuS, Ilerhst. 

 ii. Club of antenna! abrupt ; eyes considerably removed 



from anterior angles of thorax ; temples large . . . CoNINOMUS, Thorns. 



II. Thorax without longitudinal keels on disc. 



i. Upper surface more or less convex ; head shorter with 



the eyes large and the antennae situated at a little 



distance from them Enicmus, Thorns. 



ii. Upper surface depressed, elongate ; head longer, at 



least as long as broad with the eyes small and the 



antenna) inserted at a considerable distance from them. Caktoderb, Thorns. 



The genus Lafhridius, taken in its widest sense, as including the 

 above genera, contains over one hundred and thirty species, the majority 

 of which are found in Europe, ISTorthern Asia, and North America ; the 

 genus^ however^ is widely distributed, species occurring in Ceylon, 

 India, Cape of Good Hope, Havannah, the Australian region, &c. ; some 

 of them are almost cosmopolitan, as they occur in substances that are 

 articles of commerce ; the Lathridii are very variable in several points 

 of structure, and hence considerable confusion has arisen, as may be 

 known from the number of synonymous species recorded. 



Z.ATKRIDIUS, Herbst. 



The species of Lathridius proper are distinguished from the other 

 genera with the exception of Coninomus by the fine longitudinal keels 

 on the disc of the thorax, and from this as well as from tiie others by 

 the very narrow width of the thorax in comparison Avitli that of the 

 elytra ; there are two British species, L. lardarius and L. angulatus. 

 L. awpistirollis, which has been usually reputed to be a rather common 

 British species, appears not to be indigenous ; until recently only oiie 

 or two British specimens of L. angulatus have been recorded ; this 

 has been evidently owing to the fact that all our specimens in collec- 

 tions have stood undoubtedly as angiisticollis ; Mr. Crotch and one or 

 two other collectors have sent doubtful specimens of this insect to con- 

 tinental authorities who have returned them as angulatus, and they 

 have therefore been recorded as different from the series they were 

 taken from, although really they were the same, and all ought to have 

 been referred to angulatus. 



I. Elytra glabrous, much contracted and prolonged in a 



point behind ; size larger L- LAEDABICS, Z)e ff. 



