CECIDOMYIA. 81 



Lives in the withered tips of the young shoots of Salix Caprea 

 and 8. alba. Noticed by Frisch (Beschr. i. 4. 38. xxi.). 



11. iteophila, Loew, Pr. Pos. Gym. 35. 26 (1850); Winn. Ni- 

 gro-fusca, antennis 14-15-articulatis, alis cinerascentibus, pedibus fuscis 

 subtus pallidioribus. Long. | |- lin. 



Costa of the wings squamose, stout, deep black ; veins dark brown ; 

 transverse veinlet pale, situate about the middle of the subcostal vein ; 

 cubital vein quite straight, ending at some little distance in front of the 

 tip of the wing; second branch of the anal forming an obtuse angle, 

 slightly curved to the hind border. Male. Antennas 14-15 -jointed, 

 nearly as long as the body; joints as long as their petioles, rather 

 longer towards the base. Fern. Antennce fourteen -jointed, half the 

 length of the body. Abdomen tawny beneath. Oviduct elongated, 

 without valves ; two last segments whitish-yellow. 



Yery nearly allied to C. salidna ; joints of the antennae one 

 or two less in number. Lives in the rose-like galls of Salix alba. 



12. heterobia, Loew, Pr. Pos. Gym. 35. 25 (1850); Winn. 

 Nigro-fusca, alis cinerascentibus, pedibus fuscis subtus pallidioribus; 

 Mas, antennis \l-\$-articulatis ; Fcem. antennis IQ-articulatis. Long, 

 f lin. 



Costa of the wings squamose, stout, deep black ; veins dark brown ; 

 transverse veinlet pale, situate about the middle of the subcostal vein ; 

 cubital vein generally quite straight, in some cases slightly curved up- 

 ward near the tip, ending at some little distance in front of the tip of " 

 the wing ; second branch of the anal forming an obtuse angle, slightly 

 curved to the hind border. Male. Antennae seventeen- to nineteen-joint- 

 ed, nearly as long as the body ; joints as long as their petioles, rather 

 longer towards the base. Fern. Antennce sixteen-jointed, half the length 

 of the body. Abdomen tawny beneath. Oviduct elongated, without 

 valves ; two last segments whitish-yellow. 



Lives in the male flowers and in the rosettes on the tips of the 

 twigs of Salix amygdalina, and changes there to the pupa state. 



13. terminalis, Loew, Pr. Pos. Gym. 35. 28 (1850); Winn. 

 Nigro-fusca, antennis basi fuscis aut flavis, alis cinerascentibus, pedibus 

 fuscis subtus pallidioribus; Mas, antennis \$-articulatis ; Fcem. anten- 

 nis \-articulatis. Long, -f1 lin. 



Antennae often brown or yellow at the base. Costa of the wings 

 squamose, stout, deep black ; veins dark brown ; transverse veinlet pale, 

 situate about the middle of the subcostal vein ; cubital vein generally 

 distinctly curved towards the tip, ending at some little distance in 

 front of the tip of the wing; second branch of the anal forming an 

 obtuse angle, slightly curved to the hind border. Male. Antennce nine- 

 teen-jointed, nearly as long as the body ; joints as long as their petioles, 

 rather longer towards the base. Fern. Antennce sixteen-jointed, half the 

 length of the body. Abdomen tawny beneath. Oviduct elongated, 

 without valves ; two last segments whitish-yellow. 



VOL. IV. M 



