106 [October, 



the late Mr. B. Cooke, of Southport ; it is characterized by the thorax and abdomen 

 being both of an uniform black colour. 



C. INFANTULA, Roud. 

 This pretty little species has the abdomen of the male laterally compressed, of 

 a pale yellow colour, translucent at the base, grey at the extremity, and indistinctly 

 marked on the second and third segments with two oblong brown spots.* The palpi 

 are yellow with brown tips; the transverse veins of the wings are rather close 

 together, the external one being rather nearer to the internal than to the termination 

 of the fifth longitudinal vein ; the legs with cox£e are wholly pale, with the exception 

 of the tarsi, which are more or less nigrescent. Bare. I possess a single male, 

 which was captured by the late Mr. Francis Walker. 



C. ELEGANTULA, Eoild. 

 This closely resembles the last, but differs by being rather larger, by having the 

 abdomen of the male wider and flatter, the palpi entirely pale, and the transverse 

 veins of the wings rather further apart. This species is very similar to C. mollicula, 

 Fall., but may be distinguished by having the scales of the alulets larger and 

 unequal in size, and by the abdomen of the male being without the large sub-anal 

 appendages which are so characteristic of the latter species. Bare. I captured one 

 male in July, 1883, near Bicester, in Oxfordshire. 



C. PALLICORNIS, Zett. 

 This is a well-marked species, which has yellow antennae, pale whitish palpi ; 

 the abdomen with the first two segments pale and translucid and the legs yellow. 

 The late Mr. B. Cooke, of Southport, sent me a specimen of this fly for examination 

 in 1875. 



C. ANGULATA, Eond. 



This, like all the three preceding species, has the abdomen partly pale, the first 

 two segments being yellow and translucent ; the thorax is ash-coloured and un- 

 striped ; the abdomen has the third and foui'th segments grey, and is marked down 

 the dorsum by a longitudinal sub-interrupted black stripe, and by two lateral round 

 spots on each segment, which are very indistinct on the basal pale coloured portion. 

 The hinder edges of all the segments are also marked by a narrow white line. The 

 legs have all the femora grey, and all the tibiae and tarsi yellow, with the exception 

 of the terminal joints of the latter, which are black. The wings have both the 

 transverse veins clouded with black. This pretty and peculiarly marked species 

 appears to be rare. I possess a single male, which I obtained from the late Mr. F. 

 Walker. 



C. SEXNOTATA, Meig. 



This may be considered the typical, as it is also the most common species in the 

 genus. The thorax and abdomen are both grey ; the former is marked with three 

 stripes, and the latter with six spots of a brown colour ; the legs are yellow, with 

 the exception of the tarsi, which are nigrescent, and the fore femora, which arc often 

 brown or grey, especially in the females. 



* These are omitted by Roudaiii in his description. 



