REPORT OF THE STATE ENTOMOLOGIST I913 187 



The writer has found the gall of this species rather common on 

 alders, Alnus crisp a, in the vicinity of Albany, N. Y., and 

 also at Davidson's River, N. C. It has been recorded by Dr J. B. 

 Smith as common in New Jersey and is evidently abundant in and 

 about Washington, D. C. The larvae enter the ground in late fall, 

 the flies appearing the following April. Several parasites have 

 been reared from galls of this midge, namely Polymecus alni- 

 cola Ashm., MS, Polygnotus alnicola Ashm., MS, 

 Anagrus spiritus Gir. and Torymus osten- 

 s a c k e n i i D. T. 



Gall. The gall is a subconic, deformed bud 6 to 12 mm in 

 diameter. It is a variable greenish or pinkish and frequently with 

 a distinct whitish bloom. The hollow interior contains several 

 larvae, in some instances two types ; a small, possibly young, whitish 

 larva and a pale green or reddish larva with a distinct breastbone. 



Male. Length 3.5 mm. Antennae shorter than the body, thickly 

 haired, light brown; 18 segments, the fifth with a stem three- 

 quarters the length of the cylindric basal enlargement, which latter 

 has a length twice its diameter. Palpi ; the first segment irregular, 

 incrassate, the second with a length three times its diameter, the 

 third a little longer, more slender, the fourth nearly twice the length 

 of the third. Mesonotum dark brown, the submedian lines thickly 

 haired. Scutellum reddish brown, postscutellum darker. Abdomen 

 reddish brown, rather thickly clothed with fine hairs ; genitalia dark 

 brown. Wings hyaline, costa dark brown. Halteres yellowish 

 basally, fuscous apically. Legs a nearly uniform light brown ; claws 

 long, stiongly curved, the pulvilli as long as the claws. Genitalia; 

 basal clasp segment stout, truncate ; terminal clasp segment long, 

 nearly straight, slender; dorsal, plate long, broad, deeply and 

 triangularly emarginate ; ventral plate long, deeply and triangularly 

 emarginate. Harpes long, slender, irregularly truncate. 



Female. Length 4 mm. Antennae extending to the fourth ab- 

 dominal segment, rather thickly haired, light brown; 18 segments, 

 the fifth cylindric, with a length twice its diameter ; terminal seg- 

 ment reduced, narrowly oval. Ovipositor when extended nearly as 

 long as the abdomen ; terminal lobes narrowly oval, with a length 

 nearly four times the width, sparsely setose. Other characters prac- 

 tically as in the opposite sex. 



The megascopic characters were drafted from type specimens 

 in the Museum of Comparative Zoology, the microscopic charac- 

 ters from specimens reared by Mr Pergande, April 30, ii 



Dasyneura toweri Felt 

 1909 Felt, E. P. Econ. Ent. Jour., 2:289 



This species was reared September 16 and October 20, 1908 from 

 enlarged flower buds of Hypericum mutilum taken by 



