1914] The Ottawa Naturalist. 77 



form, and Contarinia negiindijolia Felt, a species which attacks 

 the leaves while still within the bud. Contarinia coloradensis 

 Felt infests and destroys the terminal buds of Pinus scopulorum 

 in Colorado and occasionally appears to be somewhat abundant. 

 Spruce buds are destroyed in Canada and probably in the 

 Adirondacks by Phytophaga tsugae Felt and the terminal ones 

 in part by Rhabdophaga swanei n. sp. 



Rhabdophaga swainei n. sp. 



The midges described below were reared by Mr. J. M. 

 Swaine, Ottawa, Canada, the latter part of May, 1914, from 

 spruce bud galls. This species apparently confines its attack to 

 the terminal bud. It is easily differentiated from other known 

 species of Rhabdophaga by the characters given below. 



Gall. The enlarged bud has a length of about 7 mm. and 

 a diameter of 4 mm., the lateral scales being somewhat reflexed 

 and the apical portion of the gall loose and open. It contains a 

 central, oval cell ahotit 1 . 5 mm. long. 



Male. -^Length 2.2 5 mm. iVntennae probably nearly as 

 long as the body, dark reddish brown, presumably with 14, and 

 possiblv with more, segments, the fifth with a stem about ^ the 

 length of the basal enlargement, which latter has a length 

 2h times its diameter. Palpi: first segment ovoid, the second 

 h longer than the first, moderately stout, the third h longer than 

 the second, more slender, the fourth \ longer than the third, 

 slender. Mesonotum shining dark brown, the submedian lines 

 sparselv gray-haired. Scutelkim, postscutellum and abdomen 

 dark brown, the latter sparsely haired. Genitalia reddish brown. 

 Halteres, coxae and femora basally reddish brown, the distal 

 portion of femora, tibiae and tarsi mostly dark brown; claws 

 moderately stout, ctirved, minutely unidentate, the pulvilli 

 h longer than the claws. Genitalia: basal clasp segment moder- 

 atelv stout; terminal clasp segment rather short, swollen near 

 the middle; dorsal plate deeply and triangularly emarginate, 

 the lobes divergent, the outer margin tapering roundly to a 

 narrowly rounded setose apex; ventral plate rather long, broad, 

 deeplv and roundly emarginate, the lobes short, stout, sparsely 

 setose. Harpes broad, broadly rotmded and thickly setose 

 apically; style short, tapering, narrowly rounded distally. 



Female. — Length 2.25 mm. i\ntennae probably extending 

 to the second abdominal segment, sparsely haired, light brown. 

 Mesonotum dull dark brown, the submedian lines sparsely 

 fuscous haired. Scutellum dark brown, postscutellum a variable 

 yellowish and dark brown. Abdomen dark brown, the margins 

 and ovipositor reddish orange, the venter reddish brown. 

 Halteres yellowish orange. Coxae yellowish brown; femora and 



