NEMATOCERA. 73 



shaped on the under surface and pale in colour. I once found 

 many on the Meadow Sweet, near Eastbourne. The metamorphosis 

 takes place in the gall, Fig. 12 (3). 



Imago. — Brownish-yellow, head yellow, antenUcX and palpi brown, 

 some faintly yellow. Thorax marked by three dark-brown stripes. 

 Abdomen tawny, with bands of dark, dense hairs. Legs dark brown, 

 lighter beneath. Wings dusky. Transverse veinlet indistinct, 

 meeting the first longitudinal near its centre ; the second longitudinal 

 vein joins the costa far from the tip of the wing. Halteres yellowish- 

 brown. Oviduct long ; first segment reddish-brown, remainder 

 yellow. Length \ lin. Kidd* describes the gall as follows : " On 

 the upper side of leaf the gall is hemispherical, nearly smooth and 

 pink; small, size of mustard-seed ; on the under surface the gall is 

 produced into a snout-like cone and is pubescent." 



C. lathyri, Fefld. 

 The larvae of this gnat are social and live in galls deforming the 

 young shoots of Lathynts sylvestris. Some metamorphose in the 

 galls, others in the earth. The imago appears to be unknown. 



C. inargineiiitorq7ie7is, Wtz. Bremi. 

 The larvae live in the deformed leaf borders of Salix viminalis, 

 and pupate there. They are gregarious, f The leaf-borders become 

 infolded and swollen, generally in elliptical patches, but sometimes 

 extending all around the leaf. When young these deformations are 

 variegated with red, yellow, and green, Fig. 12 (4). The imago is 

 black ; face, sides of the thorax, scuiellum and metathorax tawny. 

 In the $ antennae are 15-16-jointed, as long as the body. In ? 

 antennae 15-jointed, only half the length of body. Palpi pale 

 yellewish-brown. Abdomen yellowish-brown, with broad black hairy 

 bands on its dorsal surface. Wings covered by darkish hairs, costa 

 dark, transverse veinlet pale, situated in the middle of the first 

 longitudinal ; the second long, vein joins the costal at some distance 

 in front of the tip of the wings. Legs dusky-brown, hairs white, 

 changing to yellowish-brown in death. Oviduct long and slender at 

 the end ; first segment broad and dark, remainder lighter in colour, 



C. viedicaginis, Bremi.; 



The larvae live on Medicago sativa, forming a deformation between 



leaf-stalk and stipule ; they are gregarious, and pupate in the earth. 



* Ent. Mo. Mag., 1 868, p. 233. 



t Miiller, Ent. Mo. Mag. vi., 1869, p. 109, and Bremi, INIon. Gall... 1S47, pi. ii., 

 fig. 32. 



X Mon. Gall., p. 17, pi. i., fig. 16.— Bremi. 



