272 [May, 



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 foveolsD, 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 shorter than the hind coxso ; 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. Tor differences between Trigo7iaspis and Spaihegaster, see 

 p. 225. 



Ti'igonaspis, Hart., in Germ. Zeits., 2, 195 ; Tasch. Hym. 123. 

 Oynips, Panz. ; Walk., Ent. Mag., 166 (partim). 



Tngo7iaspis megaptera, Panz. 



Black, shining ; parts of the mouth, two basal joints of the fuscous 

 and villose antennae, squamulae, 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 scarcely darkened at the tips. 



^ ? . Long. 1| — 2 ; alar exp. 5 lin. 



Cynips megaptera^ Panz., 79, 7, $ . 



Trigonapsis C7'ustalis, Hart., in Germ. Zeits., 2, 195 ; Tascb. 

 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 ; 



