408 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



brown or reddish brown, especially toward the tip ; thorax black, 

 sculptured somewhat like the vertex and sparsely pubescent, 

 three deeper longitudinal furrows occurring among the rugosities 

 and converging toward the scutel; near the anterior end of the 

 intermediate furrow and parallel to it, smaller rather indistinct 

 longitudinal furrows and ridges; pit at the base of the scutel 

 divided by a longitudinal ridge; legs reddish yellow, pubescent, 

 hind tarsi sometimes infuscated, claws black ; wings with a brown- 

 ish black spot at the base of the radial area extending beyond 

 the second transverse vein but not to the anterior margin of the 

 wing; abdomen brownish red and glossy. 



On leaves of scarlet oak. 



New Haven, September, 1906 (W. E. B.). 



°A. nubilipennis Harris. 



Very like Synergus oneratus, from the dark colored variety 

 of which it differs only slightly in size, being a little larger, and 

 in the smoky cloud on the tips of its wings, which gives this 

 species its name. 



The galls of this insect are of the size and color of grapes 

 and occur on the leaves of oaks. They contain a solitary grub 

 which completes its transformations in June in the state of 

 Massachusetts. 



*A. sculpta Bassett. 



Female: length 5 mm.; head black, irregularly and coarsely 

 sculptured ; face sparsely pubescent ; antennae black, 13-jointed, 

 first and second joints very short, the third joint longer, the 

 remaining joints gradually decreasing in length to the thirteenth, 

 which latter equals the eleventh and twelfth combined ; thorax 

 black, sculptured somewhat like the head, pubescent ; legs honey- 

 yellow, coxae black, tarsi brownish ; wings smoky brown, some- 

 what cloudy, veins dark red, terminating rather abruptly before 

 reaching the margin of the wing, areolet distinct, radial area with 

 its sides almost parallel ; abdomen black, microscopically punc- 

 tate, the second segment hairy beneath the wings. Male : length 

 4 mm. ; antennae 15-jointed, third joint rather deeply incised ; legs 

 mostly dark reddish brown, the posterior pair nearly black, all 

 rather lighter at the articulations than elsewhere ; wings, includ- 

 ing the veins, hyaline, the latter seen but faintly and then only in 



