72 | AN ACCOUNT OF BRITISH FLIES. ; 
C. trifolit, F. 
The larvee live in the united leaflets of Zrifolium pratense and 
ppate there. This species is described and figured by Low.* 
C. ranunculi, Bremi. The “ Buttercup Gnat.” 
The larve of this gnat live-in the leaves of Ranunculus bulbosus 
and Zrifolium pratense. 
The zmago.—Head yellow, with some brownish markings ; crown, 
antennze and eyes black: antenne in the ¢ 13-jointed; joints 
irregular, spherical ; gray hairs. Thorax reddish-brown to black, 
sides and pectus yellowish ; wings gray ; halter stéel-gray ; head long 
and dark. Abdomen tawny, dark bands on the dorsal surface. 
C. rhododendri, Vallot. 
Vallot + gave an account of the ‘‘ Rhododendron Gnat” galls 
some time ago. ‘The larve live in bud-shaped pustules on the 
_ upper twigs of the “hododendron. The imago appears to be un- 
known. 
C. rosarum, Hardy = C. rose, Macq. and Bremi. 
Bremi ¢ in his monograph figures the galls produced by the larve 
of vos@ as swellings on the back of the leaves of Rosa incana. Hardy,§ 
who describes this species, also gives a vague account of the larve of 
some rose parasites, but the species are not definitely stated. 
Jmago.—Small, black, and shiny ; posterior margin of thorax, base 
of wings, 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. Antenne 
14-jointed in 9°, black, short, and slender: joints surrounded by 
numerous long verticillate hairs. Halteres light. Length 14 lin. 
C. pruni, Kitb. 
Moncreaff || describes the galls as “ boat-shaped ” bodies, and bred 
from them a number of parasites, as Cadllimome macropterus 
(Walker). 
C. ulmaria, Bremi. 
This gnat appears in August. The larve live in wart-like galls 
on and under the leaves of Spirea ulmaria. The galls are hood- 
* V. z. b. G., 1874, p. 143, pl. ii., fig. 4.—F. Low. 
t Mém. Acad. Sc. Dijon, 1836, p. 190. 
+ Mon. der. Gallmucken, pl. ii., fig. 31. 
§ An. and Mag, Nat. Hist., 1850, p. 186. 
| Bntomokogist, 1870-1871, p. 240. 
