72 AN A ceo VNT OF BRITISH FLIES. 



C. trifolii, F. 

 The larvce live in the united leaflets of Trifolium pratense and 

 p'ipate there. This species is described and figured by Low.* 



C. ranunculi, Bremi. The " Buttercup Gnat." 



The larvce of this gnat live in the leaves of Ramcnculns Imlbosus 

 and Trifolium prate?ise. 



The imago. — Head yellow, with some brownish markings ; crown, 

 antennae and eyes black: antennae in the $ 13-jointed; joints 

 irregular, spherical ; gray hairs. Thorax reddish-brown to black, 

 sides and pectus yellowish ; wings gray; halter steel-gray ; headlong 

 and dark. Abdomen tawny, dark bands on the dorsal surface. 



C. rhododetidri, Vallot. 



Vallot t gave an account of the " Rhododendron Gnat " galls 

 some time ago. The larvag live in bud-shaped pustules on the 

 upper twigs of the Rhododendron. The imago appears to be un- 

 known. 



C. rosarmn, Hardy = C. rosa, Macq. and Bremi. 



Bremi % in his monograph figures the galls produced by the larvae 

 of roscB as swellings on the back of the leaves of Rosa incana. Hardy, § 

 who describes this species, also gives a vague account of the larvae of 

 some rose parasites, but the species are not definitely stated. 



Imago. — Small, black, and shiny ; posterior margin of thorax, base 

 of v\angs, apex of scutellum and metathorax may be flesh-coloured ; 

 abdomen pinkish, with black markings on the ventral surface. Legs 

 long and slender. Costal and first longitudinal vein dark. Antennce 

 14-jointed in ? , black, short, and slender : joints surrounded by 

 numerous long verticillate hairs. Halteres light. Length lilin. 



C. prtaii, Kltb. _ 



Moncreaff II describes the galls as " boat-shaped " bodies, and bred 

 from them a number of parasites, as Callimome macropteriis 

 (Walker). 



C. ul/narice, Bremi. 



This gnat appears in August. The larvae Uve in wart-like galls 

 on and under the leaves of Spircea ulmaria. The galls are hood- 



* V. z. b. G., 1874, p. 143, pi. ii., fig. 4. — F. Low. 

 t Mem. Acad. Sc. Dijon, 1836, p. 190. 

 % Mon. der. Gallmucken, pi. ii., fig. 31. 

 § An. and Mag. Nat. Hist., 1S50, p. 186. 

 II Entomologist^ 1870-1871, ji. 240. 



