REPORT OF THE STATE ENTOMOLOGIST 1916 ] 69 



dark brown; claws slender, long, strongly curved. Genitalia; 

 basal clasp segment long, stout; terminal clasp segment with the 

 basal fourth enlarged, tapering; dorsal plate broad, deeply incised; 

 ventral plate roundly emarginate. Harpes narrowly subtriangular. 

 Type Cecid. 186. 



Lasioptera excavata Felt 



1907 Felt, E. P. New Species of Cecidomyiidae II, p. 6 



1908 N. Y. State Mus. Bui. 124, p. 287, 327 



This species was presumably reared from a blisterlike mine found 

 rather commonly in the vicinity of Albany on species of Crataegus. 

 The larvae occur in the mines about midsummer, the adults appear- 

 ing August 17, 1907. 



The blisterlike mine inhabited by this species is about 8 mm in 

 diameter, pale green and surrounded by a broad, diffuse, reddish 

 brown area, with diameter about three times that of the blister. 

 The tints of the lower side of the leaf are much less striking than 

 those above. One to three or six larvae may occur in a leaf. For 

 a colored illustration of the gall see Museum Bulletin 175, plate 2, 

 figure 11, 11a. 



Larva. Whitish, moderately stout, the extremities rounded, length 

 2 mm; head rather small, rounded anteriorly, the antennae moder- 

 ately long, stout, biarticulate, the terminal segment rounded apically ; 

 breastbone obtusely bidentate, shaft distinctly chitinized but more 

 slender than the anterior portion; skin moderately smooth, posterior 

 extremity roundly truncate and with a pair of fleshy, obtuse processes 

 at each of the latero-posterior angles. 



Female. Length 1 mm. Antennae black, basally yellowish; 26 seg- 

 ments, the fifth with a length a little greater than its diameter; termi- 

 nal segment slightly produced, obpyriform. Palpi; the first segment 

 rather long, narrowly oval, the second a little longer, stouter, oval, 

 the third one-half longer than the second, broad, tapering at both 

 extremities, the fourth a little longer and more slender than the 

 third; face with a conspicuous patch of silvery white scales, head 

 thickly clothed posteriorly with silvery white scales. Mesonotum 

 narrowly dark brown, broadly and variably margined laterally 

 and anteriorly with pale yellowish, the submedian lines broad, 

 pale yellowish and sparsely haired. Scutellum pale yellowish, 

 postscutellum pale orange. Abdomen mostly pale orange, the 

 second to sixth segments variably marked basally with dark brown, 

 the markings being almost obsolete on the second, nearly reaching 

 the margin on the third and extending thereto on the fourth, fifth 

 and sixth segments, ovipositor pale orange; venter pale yellowish, 

 sparsely clothed with silvery scales. Wings hyaline, costa dark 

 brown, no discal spot; the third vein uniting with the anterior margin 

 near the basal half; halteres pale yellowish. Coxae, femora and 

 tibiae mostly pale yellowish, the femora narrowly reddish brown 



