202 DIPTEBA OF NORTH AMERICA. 



gall home, I noticed that the larvae went under ground and ob- 

 tained the fly on the 29th of June. 



Li. vitis 0. S. 0.04 long, pale reddish, head blackish, antennas 

 black, apparently 23-jointed, filiform, joints broader than long, 

 sessile, with a short pubescence (they answer exactly Winnertz's 

 figure of the antenna of L. rubi Wz., I. c. Tab. IV, f. 14), two 

 basal joints yellow, thorax blackish above, with a golden pubes- 

 cence near the collare and down to the origin of the wings ; scu- 

 tellum pale reddish, abdomen covered superiorly, on each segment, 

 with rows of blackish scales ; legs pale reddish, wings with gray 

 pubescence, anterior margin with a black fringe of hairs. 



24. C. viticola, n. sp. Elongated, conical, red galls, 0.25 to 0.3 

 long ; on the upper side of the leaves of the grape. 



On the 16th of July, when I fcAind them, they contained pale 

 orange larva?, the breast bone of which had two points anteriorly, 

 with several small indentations between them. The tip of the body 

 ended in two curved, horny points, directed upwards. 



25. Cecid. pudibunda, n. sp. Fold on the leaf of the hornbeam 

 (Carpinus americana), tinged with red on the outside. It is gen- 

 erally situated between two of the side ribs, and runs, therefore, 

 obliquely towards the central rib. Inside of this fold I found, on 

 the 15th of June, exceedingly small whitish larvae ; when magnified 

 they appeared semi-transparent, with an orange spot about the 

 middle of the body, and with numerous short, erect bristles ; the 

 head is distinct, as well as two short antennae; although I did not 

 perceive the breast-bone, I have no doubt, from the appearance of 

 these larvae, that they belong to this genus. 



26. G. liriodendri, n. sp. Brown spots with a yellow or green- 

 ish aureole on the leaves of the tulip-tree (Liriodendron tulipifera). 



These spots, about 0.2 or 0.3 in diameter, indicate the presence, 

 inside of the leaf, of a leaf-mining larva of Cecidomyia. It is about 

 one line long, orange, the exserted portion of the breast bone is 

 truncated heart-shaped ; the tip of the body has two short, horny 

 points, directed upwards. (Similar spots on the same tree are 

 produced by a lepidopterous larva.) 



27. G. tuiipiferce, n. sp. Swelling of the midrib of the leaf 

 of the tulip-tree. One of these swellings, which I found on 'the 

 21th of July, contained several pale orange larvae of Cecidomyia. 

 They had two short, erect, horny points at the end of the body ; 



