NEMATOCERA. 6r 
The pupee are red, and hatch during May. 
The larvae may be found during July, and are mostly pupated by 
February. 
Cecidomyia clausilia, Bouché.* 
This species infests the willow (Sa/¢x alba), forming small, half- 
moon pads on the margins of the leaves; a single larva inhabits. 
each pad, according to Bremi.f Bergenstamm says,{ ‘these leaf- 
rollings are the work of a Phytopzus, and thus the Cecid-larve may 
be looked upon as inquilines.” According to Mr. Inchbald, in the 
paper mentioned, this is not the case, as far as his experience goes. 
Jmago.—General colour dark-black ; abdomen dark reddish-brown ;. 
head black, with a reddish spot and a tuft of white hairs on the 
face. Antennz 14-jointed in male; joints petiolated in ¢, sessile 
in 2 
Thorax black, striped and shaded with gray ; roots of the wings 
red. Scutellum yellowish-white. Abdomen reddish-brown, covered 
by dark scales, arranged in irregular transverse rows. 
Genitalia of male small and black ; the oviduct of the female is. 
long and slender, with no lainellz ; terminal joint yellow. 
Halteres with pale stalks and black knobs. Wings clear, slightly 
hairy ; second longitudinal vein straight in its whole course, terminat- 
ing before the apex of the wing. Legs pale brown, with white hairs. 
beneath ; joints and ends of tarsi pink. 
This species was found by Mr. Inchbald, and described by Dr. 
Meade, it being unknown in the perfect state*to Bergenstamm.§ 
C. sisymbrit, Schrk. = C. barbarea, Curtis. 
General appearance black; face reddish, with silvery-white pro- 
boscis and palpi. Antennz dark, composed of sixteen and seventeen 
joints in the ¢ sixteen only in the ? ; longer than the body in the 
former, about half the length of the body in the latter. 
Thorax dark reddish-yellow at the sides ; wing covered by a dark 
pubescence, with dark veins ; transverse veinlet very obliqu: , joining 
the first longitudinal near its middle ; second longitudinal vein bent 
forward at its junction with the transverse veinlet, joining the border 
a long way from the tip of the wing. 
The second branch of the third longitudinal vein curved oliquely 
* Description of New Cecid. Lntomologist, 1886, p. 213. 
+ Bremi. Trans. of Swiss Nat. Hist. Soc., 1847 ; and also 475, p. $5, Bergen- 
stamm and Low. 
t ‘Synopsis Cecidomyiarum.” ‘ 
§ Synopsis, p. 36, ‘* Imago unbekannt. 
