232 [August, 1891. 



N. CONSOBRINA, Mgn. ?, Sch. no7i End. 



Thorax striped in front by four wide black bands, the central pair of which are 

 placed near together ; posterior outer dorso-central bristles three in number ; an- 

 tennae black ; palpi yellow ; scutellum black ; abdomen as in N. rudis ; wings with 

 the apical cross vein rather oblique, and less curved than in N. rudis ; the outer 

 cross vein sinuous, and the little cross vein almost clear. Rare. 



N. KADICTJM, F. 



This, the most common species in the genus, has the antennae and palpi black, 

 the latter being sometimes pale or red at the ends ; the eyes are separated by nearly 

 an equal interval in both sexes ; the thorax has four rather narrow stripes, and three 

 external dorso-central bristles behind the transverse groove or suture ; the scutellum 

 has the apex mostly red ; the abdomen is shiny black, with two well defined broad 

 transverse bands, and has the sides red, and somewhat diaphanous in the males ; 

 the wings are tinged with brown, and have the veins, especially the little cross ones, 

 rather nebulous, and the apical cross veins much curved. Grenerally distributed. 



N. c-EsiA, Fin. 



This closely resembles N. radicum, but is quite distinct ; the thoracic stripes 

 are wider ; there are four instead of three external dorso-central bristles behind the 

 suture ; the third antennal joint is shorter, being scarcely as long as the second ; 

 the abdomen has the sides irregularly tessellated with white, instead of being 

 encircled with white bands ; the wings are clearer, the little cross veins are un- 

 clouded, and the apical cross veins are more oblique and less curved. Very rare ; I 

 have only seen one British specimen, which was in the late F. Walker's collection. 



N. INTERMEDIA, Ztt. 



setosa ?, Mcq. 



This species is of a bright blue-black colour, with a convex subcylindrical 

 abdomen having large, recurved, subglobose anal segments ;* the antennas are rather 

 short and black ; the palpi are filiform and black ; the frontalia are wide, the eyes 

 of the male being more widely separated than in any other species ; the thorax is 

 marked with four indistinct black stripes, and has three outer dorso-central bristles 

 behind the suture ; the tip of the scutellum is red ; the abdomen is of a bright shiny 

 black colour, with the vestiges only of white interrupted bands ; the wings have 

 very short cubital appendices. iV". setosa, Mcq.,t seems closely to resemble this 

 species in form and colour, only differing by having the palpi yellow instead of 

 black, and having no appendices to the wings, it is probably only a variety of the 

 same. Very rare ; I have only seen two examples (both males), which I obtained 

 with other unnamed British species from the late F. Walker. 



CTo he continued). ^ (7 



The shape of the abdomen is very similar to that of Cynomyia mortuofum. 

 t Ann. d. 1. Soc. Ent. de Fr., 11, 6, 116. 



