NEMATOCERA. 6i 



The pupee are red, and hatch during May. 



The larvK may be found during July, and are mostly pupated by 

 February. 



Cecidomyia clausilia, Bouche.* 



This species infests the willow {Saltx alba), forming small, half- 

 moon pads on the margins of the leaves ; a single larva inhabits 

 each pad, according to Bremi.f Bergenstaram says,i "these leaf- 

 rollings are the work of a Phytoptiis, and thus the Cecid-larvas may 

 be looked upon as inquilines." According to Mr. Inchbald, in the 

 l^iaper mentioned, this is not the case, as far as his experience goes. 



Imago. — General colour dark-black ; abdomen dark reddish-brown ; 

 head black, with a reddish spot and a tuft of white hairs on the 

 face. Antennas i4-jointed in male; joints petiolated in $, sessile 

 in ? 



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 lamelLx ; 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. sisymbrii, Schrk. = C. barbarea, Curtis. 



General appearance black ; face reddish, with silvery-white pro- 

 boscis and palpi. Antennae 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 

 I he first longitudinal near its middle ; second longitudinal vein bent 

 forward at its junction with the transverse veinlet, joining tlie border 

 a long way from the tip of the wing. 



The second branch of the third longitudinal vein curved u jliquely 



* Description of New Cecid. Entomologist, i8S6, p. 213. 



t Bremi. Trans, of Swiss Nat. Hist. Soc, 1847 ; and also 475, p^ 1;, Bergen- 

 stamm and Low. 



% " Synopsis Cecidomyiarum." 



§ Synopsis, p. 36, " Imago unbekannt." 



