REPORT OF THE STATE ENTOMOLOGIST I9I4 281 



fall of 1908 by Miss Cora H. Clarke and also found at the same time 

 locally abundant in the vicinity of both Albany and Nassau, N. Y. 



Gall. The gall, a purplish swelling on both sides of the lateral 

 veins of the leaf, is some 5 mm long, 3 mm in diameter and tapering 

 at both extremities (Plate 16 figure 2). Two galls may occur on one 

 vein and as many as 8 or 10 on a leaf. The larva lies just beneath 

 the vein. 



Larva. Length 1.75 mm, whitish, stout, the extremities broadly 

 rounded. Head small; antennae short, stout; breastbone broadly 

 bidentate, disappearing posteriorly. Skin nearly smooth; posterior 

 extremity broadly rounded. 



Exuviae. Length 1 mm, whitish transparent. Antennal cases 

 stout, tapering to an acute apex, scarcely thickened at the internal 

 basal angle; thoracic horns long, stout, curved. Wing cases extend- 

 ing to the third abdominal segment, leg cases to the fourth and 

 fifth abdominal segments, the latter thickly dotted dorsally with 

 fine, chitinous points. 



Male. Length 1 mm. Antennae as long as the body, thickly 



haired, dark brown, the stems white; 14 segments, the fifth with 



a stem as long as the cylindric basal enlargement, which latter 



has a length one-half greater than its diameter; terminal segment 



reduced, tapering, narrowly rounded. Palpi; the first segment short, 



stout, the second broadly oval, the third 



slender, with a length six times its width. 



Mesonotum and body a nearly uniform pale 



orange. Wings hyaline, rather broad, cost a 



dark brown. Halter es pale orange, fuscous 



apically. Coxae and femora basally, pale 



orange, the distal portion of femora, tibiae 



and tarsi mostly dark brown; claws slender, 



strongly curved, the pulvilli as long as the p . Sackenomyia 



claws. Genitalia; basal clasp segment long, .? ., ,. , .'* 



-. j - \ r . fe ;1 ., °' viburnif olia; lateral 



slender; terminal clasp segment rather short, . - , , .. ( 



' , j 1 t . 1 11 1 view of claw and tip of 



stout at base; dorsal plate broad, deeply { { seement of 



and triangularly incised; ventral plate lone, 1 1 a t •„• „n 



u j 1 , 1-1,1 • & male, enlarged (original) 



broad, sub truncate, slightly emargmate. 



Female. Length 1.5 mm. Antennae extending to the third 



abdominal segment, rather thickly haired, pale orange, slightly 



fuscous apically; 13 or 14 segments, the fifth with a length one-half 



greater than its diameter; terminal segment with a length four 



times its diameter when there are but 13, or reduced when there 



are 14 segments. Ovipositor about one-fourth the length of the 



body, the basal part stout, swollen, the terminal portion chitinized, 



irregularly cultriform. Type Cecid. ai8o6. 



Sackenomyia porterae Ckll. 

 1904 Cockerell, T. D. A. Can. Ent., 36: 155-56 (Rhabdophaga) 

 This species, according to Prof. T. D. A. Cockerell of Boulder, 

 Col., produces a slight, irregular, smooth swelling on a very small 



