REPORT OF THE STATE ENTOMOLOGIST I913 169 



arboretum, Boston, Mass., May 15th. The twigs were infested 

 with supposedly Rhabdophaga gnaphaloides galls and 

 the appearance of this insect was accidental, since the midges 

 emerged from apparently normal twigs, there being no external 

 swelling or enlargement to indicate the presence of larvae under- 

 neath the bark. 



Habitat. The larva of this species, as stated above, lives under 

 the bark in small cavities but does not form an appreciable swelling. 



Male. Length 2 mm. Antennae nearly as long as the body, 

 sparsely haired, dark brown; presumably 16 segments, the fifth with 

 a stem three-quarters the length of the cylindric basal enlargement, 

 which latter has a length twice its diameter, the subbasal whorl 

 sparse, the subapical whorl broad, thick ; terminal segment wanting. 

 Palpi ; first segment short, subquadrate, the second one-half longer, 

 stout, the third a httle longer than the second, more slender, the 

 fourth one-quarter longer than the third. Alesonotum dull black, 

 the submedian lines sparsely haired. Scutellum fuscous yellowish, 

 postscutellum a little darker. Abdomen a variable dull reddish 

 orange ; genitalia fuscous yellowish. Wings hyaline, costa pale 

 straw, halteres pale orange, fuscous subapically. Legs a variable 

 fuscous yellowish, the tarsi somewhat darker ; claws rather long, 

 slender, evenly curved, the pulvilli a little longer than the claws. 

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

 long, swollen basally ; dorsal plate broad, divided ; ventral plate long, 

 broad, broadly and deeply emarginate, Harpes stout, irregularly 

 chitinized apically. 



Female. Length 1.75 mm. Antennae extending to the base of 

 the abdomen, sparsely haired, dark brown; 15 segments, the fifth 

 with a length two and one-half times its diameter, the subbasal 

 whorl rather thick, subapical band broad, scattering; terminal seg- 

 ment greatly produced, with a length fully six times its diameter 

 and evidently composed of two closely fused segments. Palpi : 

 nearly as in the male. Mesonotum dull brown, the submedian lines 

 sparsely haired. Scutellum fuscous reddish, postscutellum fuscouc 

 yellowish. Abdomen deep red. Ovipositor about one-third the 

 length of the abdomen, yellowish, the terminal lobes slender, with a 

 length four times their width, narrowly rounded. Type Cecid. 

 2Lig66. 



Dasyneura salicifolia Felt 



1907 Felt, E. P. New Species of Cecidomyiidae II, p. 12 



1908 N. Y. State Mus. Bui. 124, p. 293, 348, 350 



This dark brown species was reared in August 1907 from young, 

 terminal, adherent, willow, Salix, leaves taken at Albany, N. Y. 

 Apparently the same gall was collected by Miss Cora H. Clarke 

 at Magnolia, Mass., June 11, 1909. 



