272 t^^'^y- 
which is as long as the preceding. Maxillary palpi 5-jointed ; labial 
2-jointed, the 2nd joint appendiculated. Mesothorax very convex, 
gibbous, glabrous, shining, with two longitudinal punctured sutures, 
and a faint medial depression. Scutellum rugose, with two glabrous 
basal foveola), distinctly margined at the base, and obscurely also at the 
apex ; viewed from above, semi-elliptical ; viewed laterally, triangular, 
with the apex rounded. Metathorax nearly perpendicular. Petiole of 
the (J distinct, but much shoi-ter than the hind coxse ; that of the ? 
concealed. Abdomen of the (^ compressed beneath; viewed from 
above, elongate- ovate, accuminated ; viewed laterally, sub-pyriform, 
truncate behind ; only half as broad, and little more than half as long, 
as the thorax ; the 2nd segment covering one-half the abdomen, the 
3rd and 5th each twice as long as the 4th (see Hartig, in Germ. Zeits. 
3, pi. 1, f. 1). Abdomen of the ? broader, sub-orbiculate above, 
ovipositor concealed. Neuration of wings as in Spathegaster and Neu- 
roterus. Por differences between Trigonaspis and Spaihegaster, see 
p. 225. 
Trigonaspis, Hart., in Germ. Zeits., 2, 195 ; Tasch. Hym. 123. 
Gynips, Panz. ; Walk., Eut. Mag., 166 (partim). 
Trigonaspis megaptera, Panz. 
Black, shining ; parts of the mouth, two basal joints of the fuscous 
and villose antennae, squamuljB, abdomen and legs, testaceous. Coxae 
at the base, and abdomen at the apex, blackish. Wings ample, longer 
than the body, finely hairy and ciliated, the usual veins incrassated and 
dark brown ; with two suffused pale brown spots, one very indistinct in 
the hinder basal angle of the first cubital cell, the other on the anal 
nervure, just beyond the medial transverse vein, more distinct ; at this 
spot the nervure is interrupted. Tarsi scai'cely darkened at the tips. 
^ ? . Long. 1\ — 2 ; alar exp. 5 lin. 
Cynips megaptera, Panz., 79, 7, ? . 
Trigonapsis crustalis, Hart., in Germ. Zeits., 2, 195 ; Tasch. 
Hym. 135. 
The galls of this species are monothalamous, soft, spherical, red, 
varying in size from that of a pea to that of a hazel-nut, and placed 
either in crevices of the bark of old oaks, or on the lateral shoots of 
younger trees. Even those which appear upon the bark are based, ac- 
cording to Hartig, upon an incipient shoot. Not uncommon in woods 
near London, the New Forest, &c. Panzer's figure is unmistakeable \ 
