490 
[March 
being double-brooded. The gall q. ficus occurs near Rock Island, Ill., 
chiefly on unthrifty sprouts 2 or 3 feet high growing round the stumps 
of young white oaks, and never on trees of any size. Dr. Fitch found 
them “ on the long slender shoots of young and thriftily growing white 
oaks.’’ I have seen them only once or twice in such a situation and then 
not 7 feet from the ground. The fact of their not occurring on large 
trees is explained by the gall-producing insect being, as I believe, sub- 
apterous. 
Gall-fly? Cynips q. forticornis n. sp. 9* Rufo-sanguineous. Head trans¬ 
verse, nearly twice as wide as long and twice as wide as the thorax, glabrous, 
scarcely polished. Eyes, ocelli and antennae brown-black, the antennae opaque, 
nearly as long as the body, very robust so that all the joints but 1, 3, 4 and 14 
are as broad as long, 14-jointed, the joints very distinct, the last joint i as long 
again as the penultimate, and 1 and 3 tapering to almost nothing at base. 
Thorax narrow, glabrous, a little polished, with only two rather coarse meso- 
notal striae converging but slightly at the scutel. Scutel small, opaque, longi¬ 
tudinally semioval, much elevated, the suture before it deeply impressed but 
without any foveae. Abdomen black, highly polished, the 2nd joint occupying 
about i of its dorsal or J of its lateral length, the 1st joint or peduncle very 
small. Viewed laterally it is a little longer than wide, and the dorsal edge of 
2 describes a circular arc of about 25°. ‘^Ventral valve” very hairy, yellowish 
subhyaline, its tip in an angle of about 80°. ‘‘Dorsal valve” large, hairy, pro¬ 
minent and distinct. Sheaths of the ovipositor generally exserted and directed 
upwards and backwards, but in two specimens distinctly lying in the “ caudal 
groove,” their tips just attaining the tip of the “dorsal valve.” Ovipositor gene¬ 
rally reposing in the “ventral valve” with its tip exserted. Legs dull rufous or 
reddish brown, the hind femora and tibiae and all the tarsal tips generally 
browner. Wings subobsolete, reduced to an elongate-triangular gray scale upon 
each side, only extending J of the way along the 2nd abdominal joint. Length 
9 .07—.10 inch. 
Thirteen 9 j unknown. Dug on May 17 fourteen 9 9 , dead but 
not decayed, out of the galls of q. ficus gathered the preceding autumn. 
Mr. Bassett, as already stated, bred this insect in November and De¬ 
cember. Comes very near to another subapterous species, C. pezo- 
machoides 0. S., reared from the galls of G, q. pisum and probably the 
true Grall-fly of that gall, but differs in the head and thorax having no 
brown markings, in the tip of the scutel not being “ recurved upwards,” 
in the last tarsal joint not being “ a little larger than usual,” and in 
there being no “yellowish spot” on each side of abdominal joint 1. 
Nothing is said, either, as to the antennse of that species being much 
stouter than usual. Probably the “ short double projection with a fan- 
