NEW BRITISH SPECIES, ETC., IN 1868. 45 



presenting a dull and somewhat tessellated appearance, the 

 interstices beino; set with lioht bristles, 



48. Barypeithes pellucidus (Frontisp., fig. 5, male), 



Schon., ii, 507 (Omias) ; Seidlitz, Berl. Ent. Zeit., 



1868, Beih., 68 ; VV. G. Pelerin, Ent. Mo. Mag., 



vol. V, p. 44. 



Mr. Pelerin records the capture by himself in Hackney 



Marshes during May and June last of a few specimens of 



both sexes (including a pale form) of an Omias which 1 



think is to be referred to the above species. The scattered 



long grey hairs on its elytra at once separate this insect 



from hrimnipes, the only other British species which it at all 



resembles. In it is considerable sexual disparity, the male 



being much thinner and more elongate than the female, and 



having its femora considerably inflated and the anterior 



tibiai much more curved inwardly. Seidlitz remarks that 



the thorax in this sex is very wide, and equal in breadth to 



the elytra, whilst in the female he describes it as narrower 



than the elytra; but the fact is that in the male the thorax 



is not widened, but the elytra are much narrowed; the result 



being the same. 



The male characters above alluded to, the strono^lv rounded 

 thorax, long hairs, more angulated and deeply impressed 

 rostrum of this insect, distinguish it from 7nollicomus, Ahr., 

 not yet recorded as British, but to which it is closely allied. 

 It appears to occur in the company of ants, and certainly 

 also on Lasius niger and Jiavus. 



According to the recent revision of the Oliorliynchides 

 sensa stricto by Herr Seidlitz (loc. cit.), some considerable 

 alterations will have to be made in the nomenclature and 



