DIPTERA. 73 



M. holotricha Felt, 08-401 and 18-188. 

 jMass. — Worcester (Thompson). 



Probably inquiline in the galls of Caryomyia holotricha (Felt, 



18-47). 



M. populifolia Felt, 08-400. 



Me. — Bar Harbor, Aug. N. H, — Aug. (Thompson). 



Bullet-like swellings at the base of aspen-poplar leaves (Felt, 

 18-186). 



Cecidomyia Meigen, 1803 {Itonida Meigen, 1800). 

 C. canadensis (Felt), 11-558. 

 Mass. — MagnoHa, Aug. 5, 1908 (Cora H. Clarke). 



Oval woolly leaf-galls on lateral veins of shad-bush, Amelan- 

 chier canadensis (Felt, 21-182). 



C. foliora Russell and Hooker, 08-350 (?C. eruhescens Osten 



Sacken, gall onty)- 

 Mass. — ^Amherst, marginal rolls on the leaves of black oak; 



Springfield (Stehhins); Worcester (Thompson). Coxx. — . 



C. reflexa (Felt), 13-146. 

 N. H. — Hampton (Shaw). 



C. spiraeina (Felt), 11-551 (C. luppa Stebbins, 10-35, gall only). 

 Mass. — MagnoHa (Cora H. Clarke); Springfield (Stehhins). 

 Enlarged terminal buds on Spiraea salicifolia (Felt, 21-189). 



C. triticicola Kieffer, 13-220 (C. tritici Felt, 12-289, not Kirby). 



The Wheat INIidge. 



Packard records this species from all of the New England 

 States and it may have been common when wheat was more 

 generally cultivated. 



DlPTEROCECIDIA. 



The following names are based on the galls onlj'-, the midge 

 which causes the gall being unknown. They are provisionally 

 placed under the generic name of Cecidomyia until the gall- 

 maker is reared and described. The specific names also are sub- 

 ject to change, unless the person who describes the midge chooses 

 to adopt the same name. The form of the galls is, as a rule, so 

 characteristic of the species that it seems detrimental to a study 

 of the family to omit them. 



Cecidomyia. 

 C. balsamicola Lintner. Balsam Gall. 

 Me. — Moosehead Lake, July. N. H. — (Thompson). 



Subglobular basal swellings of the leaves of the fir balsam (Felt, 

 18-19). 



C. bedeguar Welsh. Tufted Thorn Gall. 

 Mass. — Springfield (Stehhins). 



Subglobose vein-gall, opening surrounded by dense tufts on 

 leaves of Crataegus. 



