1892. 1 rjc) 



aiitonn.T black, third joint ovate, and about half as long again as the second ; thorax 

 jellow-grey, with four narrow black stripes ; scutellum grey ; abdomen yellow, 

 translucent, oblongo-rotund, with glittering white reflections in the males, and having 

 the hinder segments somewhat nigrescent ; wings yellow at the base, with the fourtli 

 longitudinal vein bent at an angle, and the outer cross vein sinuous ; legs black. 

 Very rare. 



C. EOTUNDIVENTEIS, Fill. 

 This species bears a general resemblance to the former, but differs by liaving 

 the antenuir and legs (with the exception of the tarsi) yellow ; the wings with the 

 fourth longitudinal vein bent in a curve, and the outer cross vein straight ; the 

 abdomen of the male is also more globular, and sometimes marked with black spots ; 

 the scutellun) is partly or wholly luteous ; the antennse have the third joint longer 

 and narrower tlian in C. contimia, and the first and second joints always yellow ; 

 the third is sometimes nigrescent, and fully twice as long as the second joint ; in 

 the female the abdomen is ovate and pointed, and with the dorsum and apex 

 grisescent. Bare ; in Mr. Dale's collection. 



27.— MACRONYCHIA, End. [93] 



n 1 -r> 1 1 • 1 ■, April, 1891 



ijren. ch. — ±;yes nude, somewhat widely separated in both sexes ; 

 f ronto-orbital bristles reaching to the roots of the antennc'e, and partly 

 in a double row in the male as well as in the female ; antenna? with 

 the second joint rather thickened and setose, the third joint not much 

 longer than the second ; arista bare ; cheeks wide, and clothed with 

 fine scattered hairs ; facialia bare ; vibrissae with two long decussating 

 bristles, plnced some way above the epistome ; abdomen ovoid, and 

 somewhat flattened in the male, and elongated wdth a projecting horny 

 oviduct in the female ; the first segment is nearly as long as the 

 others, and there are no discal seta?; wings with the fourth longitudinal 

 vein bent at a sharp angle,' and with a cubital app(;ndix ; legs havin"' 

 large tarsal claws and pulvilli in both sexes. 



M. AGEESTis, rin. 



Colour yellowish-grey ; forehead prominent ; frontal stripe black, rather wider 

 than the sides of the frontalia, which, like the cheeks, are white with black re- 

 flections ; antennoi black ; arista thickened to nearly the middle; palpi black; thorax 

 with three wide stripes, the middle of which is trifid, and the outer ones maculi- 

 form ; the outer dorso-central bristles are three in number behind the transverse 

 groove ; scutellum yellow-brown with a reddish tinge ; abdomen grey, with three 

 reddish-brown triangular spots on each segment, the bases of the triangles beino- 

 backwards ; legs black. This species, which is very variable in size, is rare ; Mr. 

 Dale has one in his collection. 



T. cylindrua, Fin., has been recorded as a British species ; I have not seen 

 a specimen, and, from Zetterstedt's description, I do not think it will belong to this 

 genus. 



