498 
[March 
able, not only generically, but by the tip of the “ ventral valve ” being 
in an angle of 60° instead of 30°, and by the sheaths of the ovipositor 
being proportionally longer. 
19. Amblynotus inermis ii. sp. 'b 9 • 
Diifers from the above only as follows :—-The 2nd and 3rd abdominal 
joints S 9 nearly conceal the succeeding ones ; the “ventral valve” is 
longer and slenderer—its tip in an angle of 45°—and also more horny; 
the sheaths of the ovipositor do not nearly attain the line of the back, 
instead of projecting about .03 inch above it; the legs are yellowish- 
white not honey-yellow; and the basal |—$ of all 6 femora h 9 is 
deep black, the black color extending further in each successive pair. 
Length % 9 .07 inch. One % , one 9 , bred from the gall q. pilulse 
n. sp., early in August. 
20. Synerhes oneratus Harris. Baron Osten Sacken, noticing 
a discrepancy in the size between his specimen (.21 inch) and the size 
given by Dr. Fitch (.15 inch) doubts whether it is the same species. 
{Proc. Ent. Soc. Phila. I, p. 68.) But Dr. Fitch says also that its 
size is similar to that of nuhilipennis and confluenta^ which are given 
by him as respectively 9 *20 inch and 9 .25 inch. Mr. Bassett’s spe¬ 
cimens were “ as large or even larger” than Osten Sacken’s. <^Ibid. 
II, p. 328.) It has been shown above that there is a great variation 
in size, in other inquilinous species also, in the same brood reared from 
the same galls. (E. g. Spnophrm Iseviventrts^ and see below Stjnerges 
rhoditiformis?) From the gall q. glohidm. 
21. Synerges mendax n. sp. 9 • Slack. Head with the space behind the eyes 
(but not the occiput) and also the face below the origin of the antennae and the 
mouth, dull yellowish brown varying from dark to pale, the vertex glabrous 
and moderately polished, the rest of the head opaque and the face finely pubes¬ 
cent. Antennae nearly as long as the body, 14-jointed with the last joint 
scarcely longer than the penultimate, yellowish-brown with the two basal 
joints blackish. Thorax with the collare very finely rugose, the mesonotum 
before the scutel with coarser transverse waving striae or rugosities, and with 
two acute longitudinal striae converging on the scutel, between the base of which 
striae is a shallow but widely impressed fovea. Scutel rugose, with the two basal 
foveae subobsolete. Under the wings a small but highly polished round spot. 
highly j)olished; the joints succeeding the 2nd concealed by it; the 
2 nd joint dorsally describing a circular are of 30°. ■■'Ventral valve” moderate, 
thin, brownish subhyaline, its tip unarmed and in an angle of 45°. Sheaths 
extending a little below or a little above the line of the back, with the oviposi¬ 
tor generally protruding from between them. Legs dull pale brown or brown- 
