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



middle legs pale yellowish brown, posterior legs much darker ; 

 wings hyaline, the first and second transverse and the subcostal 

 vein dark smoky brown, the cubitus disappearing about mid- 

 way between the two transverse veins ; abdomen smooth and 

 shining and apparently black, the first segment one-third longer 

 than the next longest, the remaining segments short. Male : 

 body somewhat shorter than that of the female, and a few shades 

 darker; antennae 15-jointed, with the first four joints darker 

 than in the female and the remaining ones a little lighter ; the 

 legs somewhat lighter than in the female ; first segment of the 

 abdomen twice as long as the second in the dry specimens. 



The galls of this species are hard woody knots at the base of 

 the young shoots on young white oak trees. They grow from 

 both the lateral and terminal branches and are hemispherical in 

 form and of large size compared with the branch, which always 

 grows out of their summits. They are polythalamous and the 

 larval cells are arranged as though the eggs had been deposited 

 around the bud before the leaves appeared. The white thin- 

 walled larval cells are firmly embedded in the woody tissue. The 

 galls formed around the lateral buds are from 12-18 mm. in 

 diameter, those around the cluster of terminal buds are often 25 

 mm. in diameter. Sometimes several branches are seen growing 

 out of a single gall instead of one. The galls do not seem to 

 affect the growth of the branches the first year but it seems in- 

 evitable that they must injure the branches the following year 

 when the galls decay. 



Dryophanta Foerster. 



*D. parvula Bassett. 



Female : a little more than 1 mm. in length ; mostly black ; 

 head a little broader than the thorax; antennas 13-jointed, the 

 first joint dark, the second globose and as long as the first, the 

 joints beyond the third equal in length, second to eleventh yel- 

 lowish brown, twelfth and thirteenth dark dusky brown ; the 

 median lines which extend two-thirds of the distance from the 

 pronotum to the scutel, the parapsidal grooves and the lines at 

 the base of each wing all smooth and shining; the parapsidal 

 grooves converging closely at the scutel, the latter finely wrinkled 

 or rugose and without foveas ; legs dark, translucent brown ; wings 



