168 tJuly, 



ADDITIONAL SPECIES OF BRITISH TYPHLOCYBIDM. 

 BY JAMES EDWARDS, F.E.S. 



The entirely pale species of Typhlocyha are more numerous than 

 is commonly supposed, and the capture of the majority of those 

 described below is due to Prof. J. W. Carr, of Nottingham University, 

 who has allowed me to describe them from his collections made in that 

 county. The most reliable characters for the identification of species 

 in this group are, undoubtedly, those derived from the male coupling- 

 apparatus ; differences of colour, habitus, and place of occurrence are 

 of course present, but determinations based on these lack the certainty 

 which attends those based upon definite and constant structural 

 characteristics the existence of which can be verified by a competent 

 person at any period of time. The examination of the sedeagus in 

 Typhlocybidse is best made without any preparation of the specimen 

 beyond the removal of any adjacent parts which may obstruct the 

 view, and the magnification employed should not be so great that the 

 whole of the appendages are not in focus at the same time ; the writer 

 finds an amplification of about sixty diameters sufficient and convenient. 



Chlorita aurantiaca. 

 Chlorita aurantiaca, Fieber, Cicad. d'Eur. (Typhlocybini) , p. 19. 



Orange-yellow ; the claws and some of the spines on the outer 

 side of the hind tibiae blackish ; a somewhat comma- shaped spot on 

 each side of the crown near the inner edge of each eye, three spots 

 next the front edge of the pronotum, one in the middle, and one 

 behind each eye, and a broad stripe down the middle of the scutellum, 

 white. Elytra with a spot at the apex of the subcostal area, the 

 entire supra-brachial area, a large spot at the apex of the brachial area, 

 and the membrane hyaline ; when viewed by transmitted light these 

 hyaline spaces, except the supra-brachial area and the spot in the sub- 

 costal area, are seen to be very faintly tinged with fuscous. 



Length, 3 - 9 mm. 



I caught one male off blackthorn, on the edge of a wood at 

 Colesborne on June 12th, 1913, and saw two other specimens which 

 escaped. 



Typhlocyba prunicola, n. sp. 

 Male : upper- side very pale yellow ; the membrane and a spot in 

 the apices of the brachial and supra-brachial areas fumose. App. 

 sup. falcate, divergent, directed forward almost at a right angle to the 



