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



*A. (C.) similis Bassett. Scrub Oak Club Gall. 



Female: length 3 mm.; head and thorax bright brownish 

 red ; abdomen red except the dorsal portion of the middle segment 

 which is nearly black; vertex finely sculptured, face pubescent, 

 the hairs converging toward the mouth, antennae 13-jointed, the 

 apical joint nearly as long as the two next preceding, with occa- 

 sionally an obscure suture making it appear as though the antennae 

 were 14-jointed ; thorax coarsely punctate, pubescent and a shade 

 darker than the head, dorsulum with three faint longitudinal lines 

 extending from the pronotum to the scutel, and two additional 

 lines, one on each side of the median line and extending from 

 the pronotum half-way to the scutel, furthermore with an obscure 

 line on the dorsulum close to the insertion of the wings, scutel 

 sculptured, its base provided with pits which are smooth ; pleurae 

 with the central portion longitudinally striate ; the legs uniformly 

 brownish red, except the tips of the tarsi, which are black ; wings 

 rather whitish, the subcostal, anal, first and second transverse 

 veins very pale yellow, the other veins colorless, the posterior 

 side of the radial area not bounded by a vein, cubitus and areolet 

 obsolete; the terminal segments of the abdomen withdrawn 

 into the others in museum specimens, the sheath of the ovipositor 

 turned abruptly upward but not extending above the back of the 

 abdomen. Male : length 2 mm. ; head and thorax black, antennae 

 15-jointed, first and second joints nearly black, the remaining 

 ones red ; legs with the middle pair dark reddish brown, the pos- 

 terior pair nearly black though still dark brown, lighter at the 

 articulations than elsewhere ; abdomen black and shining. 



The galte of this species occur on the ends of the small limbs 

 of Quercus ilicifolia. They are club-shaped, woolly, with a blunt 

 apex, generally turned to one side, covered in summer with a 

 few leaves, and usually contain one larva, though occasionally two 

 or three larvae. This species is closely related, both in the gall and 

 in the insect itself, to A. (C.) tuber Fitch. Another species of 

 oak on which it is said to occur is Q. tinctoria. 



The type locality is Waterbury. 

 *A. (C.) scitulus Bassett. 



Femaile : length 2.2 mm. ; mostly black ; vertex subrugose, sides 

 of the head and the face sometimes a very dark brown ; thorax 

 regularly punctate, parapsidal grooves present, two parallel lines 



