74 AN ACCOUNT OF BRITISH FLIES. 
C. onobrychidis, Bremi. 
The larvee live gregariously, and, according to Bergenstamm, “in 
hilsenformig zusammengefalteten Blattern von Astragalus onobrychis 
und asper, Medicago falcata, sativa, lupulina und Onobrychis sativa.” 
They pupate in the ground. 
Bremi gives a description of this species which answers nearly to 
the following: Head black, also the antennz, which in both sexes 
are strongly hairy; in the ¢ they are 14-jointed and as long as the 
body, the spherical joints being far apart ; in 2 antennze only half the 
length of body, 12-jointed. Thorax dark and shiny ; sides of thorax 
and pectus reddish, halteres also reddish-brown. Wings limpid, nerves. 
deep black, first and second longitudinals strong, pibescent. Legs 
brownish-red, tarsi pale. The ? is stout and reddish, each segment 
having a black band on it; ovipositor thin and pointed; the d is 
slender and almost black, on account of the development of the 
_ black bands on the abdomen ; ventral surface of abdomen tawny in 
both sexes. 
C. foliorum, H. Lw.=C. fulcorum, Macq. 
This is a somewhat rare gnat, the larve living in a small-sized 
gall on the leaf of the wormwood, Artemisia vulgaris. 
The zmago.— brown; bases of wings and body red, the latter 
having two rows of dark spots. Antennz 15-jointed. Wings 
brownish-gray, first longitudinal vein very strong, second quite straight, 
ending near tip of wing; wing fold like a vein. Legs slender and 
brownish. Points of the tarsi brown. Ican find norecord of the ?. 
C. plicatrix, Lw. 
The larvee live gregariously when young, and curl up the leaves of 
Rubus cesius and pass to the ground before metamorphosing. 
Imago.—Dark brown, sometimes with a reddish tinge. Abdomen 
red, with dark brown rows of scales. Antennze 14-jointed; each 
joint has a double row of hairs, the upper row the longer ; antennz 
red at base, brown above, joints sessile in 2. Wings short and 
broad. Third longitudinal ends a long way in front of tip of wing. 
Legs brown, not very slender. The following are also British species 
belonging to this sub-genus : 
C. piloselle, Binnie. =C. potentille, F. C. viola, F. Cc. alpina, 
Lw. C. tubicola, Keif. 
