REPORT OF THE STATE ENTOMOLOGIST [916 I C>5 



The presence of but three palpal segments indicates a decided 



tendency toward reduction in these organs. 



Gall. The galls formed by this species occur on the under side 

 of the leaf, scarcely showing above. They are nearly circular, 

 2 to 3 mm in diameter, yellowish white and with an irregular, central, 

 dark puncture. 



Larva. Length 1.5 mm, pale whitish, stout, narrowly oval. 

 Head small, the palpi short, stout, uniarticulate ; breastbone short, 

 broad, minutely and acutely bidentate, the lateral anterior angles 

 somewhat produced; posterior extremity broadly rounded. 



Exuviae. Length 2.5 mm, whitish and protruding from gall. 

 The form is rather stout, antennal cases stout, strongly curved, 

 with an inconspicuous chitinous tubercle at the internal basal 

 angle. Wing cases extending to the third abdominal segment, 

 the leg cases to the fifth and sixth abdominal segments, the dorsum 

 of the latter thickly clothed with short, stout, brownish, chitinous 

 spines; posterior extremity broadly rounded, unarmed. 



Male. Length 2 mm. Antennae fuscous yellowish; 15 seg- 

 ments, the fifth with a length one-fourth greater than its diameter, 

 the terminal segment produced, narrowly rounded apically and 

 occasionally fused with the preceding. Palpi; the first segment 

 short, stout, swollen distally, the second broadly oval, stout, the 

 third one-half longer, narrowly fusiform. Mesonotum shining 

 dark brown, sparsely haired. Scutellum dark brown, rather thickly 

 clothed apically with yellowish setae, post scutellum yellowish 

 brown. Abdomen a nearly uniform dark brown, the segments 

 very narrowly lined posteriorly with whitish, the sixth, seventh 

 and the terminal segment with a broad, naked, orange band; genitalia 

 fuscous; venter sparsely clothed with fuscous scales. Wings hyaline, 

 costa dark brown, the third vein uniting therewith at the distal 

 third, the small stigma white. Halteres fuscous distally, white 

 basally. Legs a nearly uniform dark brown, the tarsal segments 

 very narrowly banded basally with whitish; claws stout, the pul villi 

 shorter than the claws. Genitalia; basal clasp segment stout, 

 terminal clasp segment slightly swollen at the base, stout; dorsal 

 plate broadly and triangularly emarginate, ventral plate long, 

 tapering, broadly rounded. Harpes stout, tuberculate apically. 



Female. Length 1.5 mm. Antennae fuscous yellowish, 18 seg- 

 ments; the fifth with a length slightly greater than its diameter; 

 terminal segment produced, narrowly rounded apically and evidently 

 composed of two segments. Palpi; the first segment long, swollen 

 distally, the second broadly oval, the third one-half longer than the 

 second, flattened. Mesonotum dark brown, the submedian lines 

 sparsely haired. Scutellum shining dark brown, post scutellum 

 yellowish dark brown. Abdomen a uniform dark brown, the venter 

 dark reddish brown and sparsely white-scaled mesially and laterally ; 

 ovipositor dull orange. Wings hyaline, costa thickly black-scaled, 

 the third vein uniting with costa at the somewhat large, whitish 

 discal spot near the basal half. Halteres fuscous apically, white 

 basally. Legs dark brown, the tarsi black, the femora, tibiae and 



