Limnobaris.] RHTNCHOPHORA. 379 



Xi. T-album, L. Elongate, black, upper surface more or less 

 distinctly, but scantily, clothed with, recumbent grey hairs, inserted in 

 the punctures, underside thickly clothed at sides with whitish or yellowish 

 white scales ; rostrum curved, smooth on its dorsal central line ; thorax 

 longer than broad, distinctly, closely and regularly punctured ; elytra 

 with deep strise, interstices with single rows of punctures. L. 3^-4 mm. 



Male with the abdomen longitudinally impressed at base; in the 

 female it is convex. 



Marshy places ; on aquatic plants ; also by general sweeping ; local, but not un- 

 common in many districts ; London district, common in most ditches (S. Stevens) ; 

 Faversham ; Chobham ; Maidstone ; Hertford; Suffolk; Hastings; St. Leonards; 

 Amberley ; Portsmouth district ; Glanvilles Wootton ; Burnham, Somerset, in 

 abundance; Bristol; Crymlyn Bog, Swansea, on Erica tetralix (this was probably 

 accidental) ; Llanberis ; Sutton Park and Coleshill. near Birmingham ; Wicken and 

 Burwell Feus ; Bepton ; Scarborough ; Northumberland and Durham district ; 

 Scotland, local, Sol way, Tweed and Clyde districts. 



BARZS, Germar. 



This genus is a very extensive one, containing upwards of three 

 hundred species ; they are widely distributed throughout the world ; 

 although the majority are found in tropical countries yet the genus is 

 well represented in the Palearctic region and no less than forty-seven 

 species occur in Europe ; of these six only are found in Britain, and one 

 of these seems to require further confirmation ; it is very possible, as 

 Mr. Champion observes (Ent. Monthly Magazine, xxv. 37), that 

 B. cupriroitfris, which occurs at Calais, may be found along our southern 

 coast, if its food plants Diplotaxis, Brassica, Erysimwn and Sinapis 

 arvends are examined in various districts, especially when we remember 

 that B. scolopaceus has only occurred in one locality and might easily 

 have hitherto escaped observation ; besides the characters above mentioned 

 both our genera of the Baiina may further be known by the distinct 

 scutellum, vertically oval and free eyes and simple femora. 



The larva? do not call for any particular remark ; they undergo their 

 transformations in the stems or at the head of the root of their food 

 plants ; according to Plieninger (Isis, 1837, p. 525), however, the larva 

 of B. chloris forms small galls at the roots of its food-plant, which it 

 leaves when full fed, and undergoes its transformations in the earth. 



The sexual characters are not marked ; in the males the rostrum is a 

 little thicker and more closely punctured than in the females, and the 

 base of the abdomen is longitudinally excavate in the middle. 



The British species may be separated as follows : 



I. Thorax and elytra glabrous, entirely, or almost en- 

 tirely, without scales. 



i. Elytra unicolorous, deep black B. LATICOLLIS, Marsh. 



ii. Elytra unicolorous, deep blue, or greenish -blue. 

 1. Interstices of elytra narrower; body oblong. 



