NEW BRITISH SPECIES, ETC., IN 1866. 99 



produced : and, according' to Mr. Matthews, may be known 

 by its short and wide form, the sculpture of its thorax, its 

 castaneous colour and lonj^ leo;s. 



De Marseul quotes this species as a var. of T. atomaria, 

 DeG. 



118. B(EOCRARA LiTTORALis, Thomson, Skand. Col. vol. i, 

 p. 99; D.Sharp, Ent. Mo. Mag. vol. ii, p. 230; 

 Rev. A. Matthews, loc. cit. p. 242 [Trichopteryx). 

 Mr. Sharp notes the capture of this insect by himself at 

 Rannoch ; and Mr. Matthews subsequently records its de- 

 tection by Mrs. Matthews, near Guniley, in moss, in 1862, 

 since which year he has himself met with another example, 

 and four more specimens have been taken by Mr. WoUaston 

 in Devonshire. Thomson's Bceocrara appears to be chiefly 

 founded on the lateral marpjination of the thorax in this 

 species ; but Mr. Matthews thinks it is separated from Tri- 

 chopteryx without suflicient reason ; and De Marseul makes 

 it a mere sub-division of that genus, whilst the late Dr. 

 Schaum sunk it altogether. In the event of its suppression, 

 Mr. Sharp proposes to give the name Tho7nsuni to the insect, 

 as there is already another species named littoralis in the 

 genus Trichopteryx (Mots., Bull. Mosc. vol. xviii, 1845, 

 p. 517), but which appears to be a Ptenidium, and (accord- 

 ing to Mr. Matthews, who does not think the proposed 

 change necessary) only capable of being cited as a synonym 

 of P. punctaium, Gyll. Mr. Crotch, however, follows 

 Mr. Sharp's opinion. 



T. littoralis has the punctuation of its upper surface coarse 

 and distant; presentinjx, indeed, the only instance of true 

 punctuation in the genus Trichopteryx, — all the other spe- 

 cies known (upwards of fifty) having the surface either 

 smooth, or more or less tuberculate. The posterior angles of 



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