412 



CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



color, antenna reddish brown, 13-jointed, the terminal joints 

 darker in color than the basal; thorax rugulose, longitudinal 

 grooves two in number, converging toward the scutel, and flank- 

 ing two shorter grooves reaching half-way from the pronotum 

 to the scutel, an indistinct groove over the base of the wings, 

 scutel wrinkled and with a few scattered hairs, its base provided 

 with f ove^e ; legs light brown, the posterior pair dark brown, tips 

 of tarsi very dark brown or black ; abdomen black and polished, 

 its ventral portion, however, dark reddish brown, its second seg- 

 ment half the length of the abdomen; radial area not closed, 

 cubitus disappearing before reaching the first transverse vein. 

 Male: length 2 mm.; antennae 15-jointed, the third joint incised; 

 abdomen black, the second segment three- fourths as long as the 

 remaining ones ; otherwise as in the female. 



The galls of this species occur on Quercus montana, are club- 

 shaped, situated on the petioles of the leaves, 12.5 mm. in diam- 

 eter, hard and woody when mature. 



Type locality : Waterbury. New Haven, 8 October, 1908 (W. 

 E. B.). 



*A. ostensackeni Bassett. 



Female : length 3 mm. ; mostly black ; head and thorax irregu- 

 larly sculptured; face sparingly pubescent, palpi brown, antennae 

 pale brown, 13-jointed; thorax with a few scattered hairs, longi- 

 tudinal lines broken by the sculpture and only indistinctly trace- 

 able, mesothorax along the posterior margin bounded by a salient 

 black shining ridge; wings with a faint tinge of brown, veins 

 brown and distinct, cubital vein disappearing before reaching the 

 first transverse vein ; posterior legs very dark and shining brown, 

 all the others somewhat reddish brown and lighter at the joints 

 than elsewhere ; abdomen black and shining. Male : length 2.5 

 mm.; antennse 15-jointed, dull dark brown; legs darker than in 

 the female ; abdomen elongated, with the third joint nearly two- 

 thirds its entire length ; otherwise like the female. 



Galls of this species are somewhat rounded, oblong, hollow, 

 pale greenish yellow, occur on the under side of the leaf, project 

 slightly on the opposite side and contain an oblong kernel kept in 

 position by filaments radiating toward the outer shell. 



Type locality: Waterbury. 



