No. 22.] HYMENOPTE^IA OF CONNECTICUT. 43 1 



colored than in the male; wings somewhat shorter than in the 

 male ; abdomen petiolate. Male : length 1.5 mm. ; black ; antennae 

 15-jointed, first and second joints ovate, the former dark brown 

 at base, paler beyond, second and six or seven following joints 

 yellowish brown, remaining joints dusky, third joint curved but 

 not excised ; head punctate ; thorax obscurely wrinkled, pleurae 

 striate, parapsidal grooves distinct though delicate, scutel finely 

 rugose and provided with f ovese ; legs brownish yellow ; wings 

 hyaline, veins pale, areolet distinct, cubitus extending to the first 

 transverse vein, radial area open; abdomen petiolate. 



In this species the galls reach maturity in June, and occur on 

 the young shoots of Quercus ilicifolia, which are checked in their 

 terminal growth; they are woody, polythalamous, and at most 

 grow to be 15 mm. long and 6 mm. in diameter. 



The type locality of this species is Waterbury. 

 *A. (C.) punctatus Bassett. Oak Knot Gall. 



Female : length nearly 4 mm. ; head and thorax black ; face 

 pubescent, palpi light brown, tips darker, antennae reddish at the 

 base, becoming dull dark brown beyond, 14- jointed ; thorax punc- 

 tate, parapsidal grooves converging toward the scutel, in addi- 

 tion to these a median longitudinal line on the dorsulum, and on 

 each side of this latter a line extending from the pronotum to the 

 scutel, finally two depressions or grooves, one over the base of 

 the wings, scutel with coarse, irregular punctures ; legs reddish 

 brown, except the coxae and tips of the tarsi, which are dark 

 brown or black : wings hyaline, their veins brown, areolet present, 

 radial area open; abdomen black above, reddish brown beneath, 

 and with the exception of the first segment minutely punctate, 

 second segment with a few hairs on the lower half. 



The gall of this species is a rather smooth, club-shaped, woody 

 knot, 100 mm. long, 37 mm. in diameter at the upper and largest 

 end, and completely encircling branches as much as 12.5 mm. in 

 diameter. It occurs on red, black, scarlet and scrub oaks. 



The type locality is Waterbury. Orange, 9 January, 1914 (B. 

 H. W.) ; Bloomfield, January, Lyme, March, Stonington, June, 

 1914 (I. W. Davis) ; New Haven, 19 March, 1915 (W. E. B.). 

 *A. (C.) singularis Bassett. Small Oak Apple. 



Female : length nearly 4 mm. ; head black and rugose, mouth 

 parts dark brown, antennae 13-jointed with, in some specimens, a 



