Insect Galls. 53 



Jarvis, .'Ssth ann. rept. Ent. soc. Ontario, L907, p. s". 



Felt, 23d rept. ins. \. V. I. L907, 1908, p. 374, 375, 376, pi. 36, flg. 8-9; Ottawa 

 aat., 1909, v. ■!>, p. 246, 247, '-Ms. 



This is a conical gall on the tip of the stem, 1-2 cm. Long. There are 

 many leaves, with thickened buses, clustered together. The Larvae, 

 yellowish or orange, live between the bases of the leaves. ( )n goldenrod, 

 Solidago canadensis. Common. 



Baldratia Jlavolunata Felt. Lunate marginal gall. Fig. 102. 



Choristoneura flavoluiiata Kelt, 22d rept. bis. N. Y. f. Hint;, 1:107, p. 154-165, 



Jarvis, 38th aim . rept. Ent. soc. Ontario, 1907, p. 88, pi. A, fig. 1;. 

 Baldratia Jlavolunata Pelt, 23d rept. ins. N. V. f. 1907, l90K,p.321, 330; Ottawa aat., L909, v. 22, p.248. 



This blister-like gall projects equally from the two sides of the leaf. 

 4-8 mm. in diameter. Smooth. The central portion yellow surrounded 

 by a ring, which is usually dark violet, sometimes black. Monothalamous. 

 On goldenrod, Solidago canadensis. June. 



Euthamia graminifolia. 

 Cecidomyia? evthamiae, n. s. 



A curved, fusiform, striate gall found usually among the flower heads, 

 infrequently in the axils of the upper leaves or branchlets. Deep violet- 

 red, a few showing some green. Stem 1 cm. ; gall 10-13 mm. long, 1 mm. 

 wide. Thin-walled, one-celled. Rather common about Springfield, Mass. 

 on fragrant goldenrod, Euthamia graminifolia. August to September. 

 Very abundant at Southport, Maine. 



Aster. 

 Lasioptera asterifoliae Beutenmuller. 



Lasioptera asterifoliae Beutenmiiller, Bull. Amer. mus. nat. hist., 1907, v. -2.'!, p. 395, pi. 14, fig. 1."). 

 A circular, blister-like gall, showing about equally on the two sides of 

 the leaf. Monothalamous. 3-4 mm. in diameter. Black surrounded by 

 a red ring, a few with black dot at center with red ring, then a black ring, 

 then a red ring, the surrounding portions of the leaf a very deep red ; color 

 beneath similar but lighter. Larva white or very light yellow ; full-grown, 

 Oct. 17. Several on each leaf of aster, Aster, Mt. Tom, Mass. 



Aster ericoides. 

 Cecidomyia? gemmaria, n. s. Fig. 110. 



The deformed bud of an aster constitutes this gall. It is one-celled, 

 ovate, pointed and in some cases mucronate, green with a dense white 

 pubescence. Length 4-7 mm., width 3-5 mm. Walls of the conical cell 

 1 mm. thick. Abundant on Aster ericoides. Collected by Dr. Geo. 

 Dimmock, Aug. and Sept. 1908. Found in October in great abundance 

 when it had turned dark gray. 



Cecidomyia? strobili gemma n. s. Fig. 111. 



This ovate gall is the result of the arrest of development of a side 

 branch near the top of the stem. One to several may be found on one 

 plant. The leaves are closely lapped over the one cell. Green. 8-10 mm. 

 long, 6-8 mm. wide. On white heath aster, Aster ericoides. September. 



