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



rugose, subopaque, with a few indistinct striae converging toward 

 the mouth on both sides, mandibles reddish, their tips black, palpi 

 brownish yellow, front opaque, vertex with a kind of lustre, 

 irregularly sculptured, antennae 14- jointed, yellowish brown, 

 brown toward the tip, third joint nearly as long as the two pre- 

 ceding combined, the following joints gradually diminishing in 

 length, joints eight to thirteen but slightly different in length, the 

 apical joint about one and one-half times the length of the pre- 

 ceding; humeral parts of the pronotum coarsely rugose, opaque 

 in contrast to the comparatively smooth and shining mesonotum, 

 the latter with dense transverse microscopic rugae, which do not 

 materially diminish the lustre of the surface, three distinct im- 

 pressed lines running from the pronotum some distance backward, 

 parapsidal grooves distinct, their margins less well cut or less 

 smooth than usual, appearing as if the grooves were formed by 

 a series of confluent punctures, the lateral grooves with similar 

 characters and somewhat curved with the convexity on the out- 

 side, tegulae yellowish brown, pleurae densely irregularly sculp- 

 tured, opaque, except a shining spot on their upper portion, scutel 

 rugose; legs mostly brownish yellow, tips of tarsi brown, hind 

 femora and tibiae infuscated, middle femora in some cases also 

 infuscated; wings hyaline, somewhat whitish, distinct veins of 

 pale brownish color, areolet distinct. 



Gall occurs on pin oak (Quercus palustris) on the limbs of 

 which the woody knots bear pale yellow conical projections, which 

 constitute these galls. 



Type locality: Waterbury. Saugatuck, 29 March, 1915 (An- 

 drew Westlin). 



*A. incertus Bassett. 



Male : length 3 mm. ; head black, antennae 14- jointed, the 

 first joint shining black, clavate, the second ovate, the third half 

 as long as the first and second combined, the fourth equal in 

 length to the third, the succeeding joints subequal, becoming 

 shorter and shorter, the joints beyond the first dark brown ; thorax 

 black, roughened and hairy, two parallel lines extending half-way 

 from the pronotum to the scutel, additional lines two in number 

 extending half way from the scutel to the pronotum and diverg- 

 ing, a line over the base of each wing, these lines rather obscured 



