328 AMERICAN HYMKNOPTERA. 



the end removed. This is a rare species, though I have found it in 

 a certain locality several years. 



Gall-fly. Male. — Body black. Head finely wrinkled, wider than the thorax. 

 Antennse fifteen jointed, first joint smaller than the second, club shaped, second 

 globose, both pale, third to the fifteenth changing gradually from pale to a dark 

 dusky brown. Thorax — the parapsides very distinct, closely converging at the 

 scu tell urn. The space between these lines is polished and smooth and outside 

 finely punctate. Scutellum rather coarsely rugose; fovse wanting. Abdomen 

 petiolate. compressed, shining black. Legs very pale brownish yellow. Wings 

 subfuscous; veins heavy reddish brown. Radial vein heavy and ending very 

 abruptly within the margin of the wing. Areolet distinct. Cubitus heavy, 

 reaching the first transverse. 



Females. — Both broken. The antennae paler and the joints shorter than the 

 male, and the abdomen is below the average size in this genus. Body .09, an- 

 tennte .08, wings .09. 



Waterbury, Conn. One male and two female specimens. 



Holtraspis fasciata n. sp. 



For nearly forty years the gall of the fine species I now describe 

 has been a familiar object in my entomological rambles, and during 

 that time but few years passed that I did not make some effort to 

 rear the gall-flies. Two years ago I succeeded in doing this, and I 

 have before me a large number of fully developed insects. 



The galls are found almost every year in September on the 

 thrifty Summer growth of Quercus Ulcifolla. They are arranged 

 in linear clusters near the tips of the shoots, somewhat after the 

 manner of H. diirlcoria. During their growth they are mottled 

 light and dark green color, and these spots often are arranged in 

 broad bands that suggest the trivial name. When full grown they 

 range from one-fourth to one-half an inch in diameter. They are 

 nearly but not exactly round. When fully grown they drop to the 

 ground at a touch, and their pretty appearance soon changes to a 

 dull black. 



The large larva] cell is imbedded in a fine cellular substance that, 

 in ripe galls, is of a deep tan color. Measured from the base to the 

 tip of the cell it is .45 of au inch long, and across the widest part 

 towards the base .37 in large specimens. When collected I imme- 

 diately placed the galls on the ground in a condition as nearly nor- 

 mal as possible. At this time there were no larva? in the galls, but 

 in the exact centre a minute viscid point that seemed a mere speek 

 of jelly. There was, certainly, nothing that looked like an organism, 

 even under a strong magnifier. In the course of the Autumn the 



