HETEROCERID^. 1*37 



i. Elytra oblong-ovate, appearing about one 



and a half times as long as wide . . R. cupreus, Miill. 



ii. Elytra elongate-ovate, appearing about 



twice as long as wide, their sides ev^enly 



rounded throughout . . . . R. subviolaceus, Milll. 



II. Elyti'a with only the seventh interstice 

 more elevated than the others, 

 i. Elytra oblong-ovate, their sides almost 



straight in the middle third . . . R. niteks, Milll. 



ii. Elytra ovate, a little widened behind . R. sodalis, Er. 



R. sodalis, Er. (Naturg. Ins. Deutsch. iii. 532). Of the same 

 size as ii?. subviolaceuSy Miill., from which species it may be known by 

 its much broader form and more shining upper surface, the broader 

 thorax and wider elytra, which are more widened behind the middle, 

 the fine punctured strite, the quite flat six inner interstices, and the 

 very strongly raised seventh interstice ; it resembles R. nitens in the 

 red-yellow antennae and claws, but is broader and flatter, with the thorax 

 broader in proportion to its length, and the basal angles more produced. 

 The thorax is less convex than in H. subviolaceus, finely granulate 

 before the base and at the sides, very dull, being very finely punctured, 

 with an irregular admixture of larger, but yet fine, punctures ; the 

 general colour is bronzy, with the elytra lighter eeneous, legs brown or 

 reddish-brown. 



Ohristow, Devon (Champion) : one specimen taken by Mr. Champion 

 in 1907, and recorded by Mr. Edwards {I.e. p. 78). This species appears 

 to be very rare, or perhaps overlooked, on the Continent. 



HETEROCERID.S:. 



HETEROCERUS, Fabricius. 

 Considerable doubt still exists with regai-d to this genus, which I 

 have before discussed at considerable length (Brit. Col. v., Appendix, 

 459-464); one of the most discussed species is R. arenarius, Kies., 

 which is given in the last European Catalogue as a synonym of 

 Il.jiexuosus, Steph., another synonym being H. femorcdis, Kryn ; the 

 insect standing under the name in our collections has occurred, 

 apparently, only in Ireland, in co. Down (Strangford Lough), and near 

 Dublin (Baldoyle and Portmarnock), but its identity has not been 

 definitely ascertained. Mr. Champion has suggested that it may be 

 identical with //. rectus, Wat. As there seems also to be some doubt 

 as to the identity of our specimens standing under //. femoralis, 

 Messrs. Johnson and Halbert think it best to retain the name 

 II. arenarius for the Irish species {v. Irish List, 1902, p. 727), but 

 judging from Kiesenwetter's own description {v. Brit. Col. v. 462) and 

 the conclusion that Mr, Crotch came to that the Irish specimens did 



