- ton or 
66 AN ACCOUNT OF BRITISH FLIES. 
fuscous. Head fuscous. Wing-cases pitch black; antenne and 
legs black ; abdomen dirty yellow. 
Imago.—Tawny, head yellow. Thorax has three brown stripes. 
Wings with dark borders. Halteres brown, yellow at base. Abdomen 
dirty yellow, black hairs. Legs black, femora at the base, and coxze 
yellow. 
C. terminalis, Lw. = C. fragilis. 
Twenty to thirty ova are laid on shoots of Salix fragilis. The 
larvee, which are yellowish-red, live in bloated galls, and live fourteen 
days. They pupate in the earth, When the larve have left the 
shoots, many scars appear between the healthy and the galled parts 
(= woody cells). ‘The same process takes place which takes place at 
the fall of the leaf in autumn, 
Imago.—Brownish-black ; antennz brown or yellow at the base ; 
1g-jointed in ¢, 16-jointed in 9. Abdomen tawny beneath. Ovi- 
duct long, last two segments yellow. Costa of wings thick, deep 
black ; veins dark brown; transverse veinlet, situated about the 
middle of the first longitudinal vein; second long. vein curved 
towards the tip, ending at some little distance in front of the tip of 
the wing. 
C. campanule, Miill.—Larve form galls on the seed vessels, and 
live also in green galls (axillary), developed from buds, or may be 
in terminal clusters on C. rotundifolia. Red larvee, with first segment 
beak-like. Jago unknown. 
C. bursaria, Bremi. 
Galls on Glechoma hederacea ; they are tubular bodies, with one pale 
larva ; when full fed the tubes become detached and fall. Fig. 12 (2). 
Jmago.—Crown of head raised conically. Reddish-yellow ; thorax 
has three confluent black lines and dark gray hair. Abdomen dark 
brown. Palpi yellow, crown black. Antennz brown. 18-jointed, 
petioles shorter than joints. Legs blackish-brown, whitish beneath, 
yellowish at their junction with body. Wings gray, scarcely iridescent, 
dark thick gray hairs. Antenne of ? shorter than 4, petiolate as in 
d. Oviduct very long and yellow. 
C. veronice, Bremi= C. chamedrys, Inch, * 
The larve form tufts of leaves, forming a hairy pouch on the 
barren stems of Veronica chamedrys. Fig. 12 (5). The larve 
change in these nests. Pupa figured by Winnertz in “ Linnza Ento- 
mologica,” Taf. 1. 
C. Crategi, Wtz.= T. oxyacanthe, Schk. 
In white-thorn hedges we often see thé shoots terminated in tufts 
nd knobs; each of these is a'gall tenanted by several of the larve 
