74 THE CANADIAN ENTOMOLOGIST. 



Collected at Garrison, New York, by T. D. A. Cockerell and myself, 

 in August, 1907. The gall occurs singly or in numbers on the under sides 

 of the leaves of horse-balm ( Collinsoiiia Canadensis). 



Cecidomyia (?) collmso7iifolia, sp. nov. — Larva. — White, elongate, 

 narrow. Anal segment rounded. Breast-bone long, narrow, gradually 

 broadening toward the apex, where there are two rather sharp teeth, with 

 the space between very deep. Length, 1.75 mm.; width, .50 mm. 



Gall. — Pale green, elongate, narrow swellings on the mid-rib, or 

 larger veins on the under side of the leaf of horse-balm ( Collifisonia 

 Canade7isis). 



Collected at Garrison, New York, by T. D. A. Cockerell and myself, 

 in August. The gall contains a single larva. 



Cecidomyia (2) triade7iii., sp. nov. — Larva. — Pale orange, long and 

 narrow, much longer than broad, and of almost equal width. Anal 

 segment rounded. Breast-bone or anchor process prominent, long, 

 anterior portion greatly enlarged, with a projection on each side and two 

 lateral teeth at the apex. Length, 4 mm.; width, .75 mm. 



Gall. — Green, globular or somewhat elongate swellings on the stalk 

 of marsh St. John's wort (Triade}ium virginicum). Length, 6-10 mm.; 

 width, 5-5.50 mm. 



Collected in Middlesex County, New Jersey, Sept, 15, 1907, by 

 W. de W. Miller. 



Cecidomyia (?) angelicce, sp. nov. — Larva. — Orange, elongate, sides 

 parallel. Each segment with a minute filament on each side, and a num- 

 ber at the terminal end of the anal segment, which is rounded. Breast- 

 bone or anchor process long, slender and parallel to the broad anterior por- 

 tion, which has a long, sharp projection on each side and three apical teeth, 

 the median one being shorter. Length, 3.50 mm.; width, .75 mm. 



Gall. — Elongate swellings of the stalk of the pubescent angelica 

 (Angelica villosa). Each gall contains numerous larvae, which are in a 

 large chamber filled with pith of the plant. Sometimes as many as four 

 swellings are on a single stalk. Length, 25 to 55 mm.; width, 8 to 14 

 mm. The larvae hibernate in the gall. 



Collected in Middlesex County, New Jersey, Oct. 22, 1907, by W. 

 de ^V. Miller. 



Cecidomyia (?) boehmerice, sp. nov. — Larva, — Pale yellowish-white, 

 elongate, segments of almost equal width. Anal segment rounded and 

 without filaments. Breast-bone or anchor process very long and slender. 



