NEMATOCERA. 69 
with hairs the same as inthe ¢. The oviduct elongated and white, 
or light brown, the ¢ genitalia brown. The first longitudinal vein 
very near costa. Second longitudinal vein joins the costa some way 
from the tip of the wing. 
C. cardaminis, Wtz. 
The larvze of this Cecid feed on the flowers, etc., of Cardamine 
pratense and amara, and destroy all the parts they attack, usually 
picking out those plants that grow on damp and spongy ground ; 
the white amara often assuming the purple hue of frazense through 
the action of these insects. They change.to the pupa state in the earth. 
The zmago is black; thorax with three dark bands on a light 
ground colour; scutellum sometimes pinkish; abdomen tawny ; 
16-17-jointed antenne ; in the ¢ the petioles of the joints near the 
base are short, those in the middle one-fourth shorter than the joints, 
antennz as long as body; in @ they are much shorter, and the 
abdomen is rose-coloured, with dark-brown or black hinder borders 
to the segments. Wings darkly pubescent ; brown veins ; first longi- 
tudinal vein very near costa; second longitudinal vein bending 
forwards at its junction with the transverse veinlet, and joins the 
costal at some distance from the tip of the wing. Inthe ? the 
second longitudinal is straight from the transverse,veinlet to the border. 
C. heraclei, K\tb. 
Concerning this species, Low and Bergenstamm* say the imago is 
unknown. The larve are social and live on the leaves of Heracleum 
Spondylium, and pupate in the ground. 
: _ (C. strobilina, Bremi. 
C. heterobia, Lw.= le seliened Herd 
The larvze of eferobia live in the ¢ flowers and in rosettes on the 
leaves of Salix amygdalina. ‘The larve mentioned by Perrist seem 
to be referred to this species. Concerning the galls he says: ‘ Daris 
ce feutre vivent de nombreuses larves de Cécidomyie.” They 
pupate where they live. They also live as “ inquilines” An the galls 
of C. rosaria. 
The zmago is dusky brown to black ; abdomen tawny beneath ; 
~ scutellum and end of thorax pinkish. Legs fuscous, paler on under 
surface. Antenne of ¢ 17-19-jointed; 16-jointed in 2. Oviduct 
long, last two segments yellowish-brown. Costa of wing very thick and 
dark ; transverse veinlet pale, meeting the first longitudinal about its 
middle ; second longitudinal vein generally straight. Second branch 
of third vein curved so as to form an obtuse angle. 
* Syn. Cec., p. 47. + An, Ent. Soc. Fr., 1870, p. 180. 
