252 Benj. D. Wakh on the Insects inhabiting the Galls 



bored, showing that in these the egg hail failed to hatch out. My 15 imagos all 

 transformed in the gall, the galls having been gathered in March. Described 

 from 7 specimens. 



Pupa unknown. 



Imago. Euura s. ovum, n. sp. — 9 Shining honey-yellow. Head with the 

 eyes, a square spot enclosing the ocelli, but separated from the eyes by a pretty 

 wide orbit, and also the tips of the mandibles, all black. Clypeus emarginate 

 in a circular arc of about 90°. Labrum rounded -at tip. Occiput more or less 

 clouded with black on the disk. Antenna? dull rufous above, with their basal i 

 black, honey-yellow below, with the scape black, and more or less of the basal 

 I of the flagellum dusky, three-fifths as long as the body, joints 3 — 5 subequal, 

 ■1 Blightly the longest, 5 — S very slowly shorter and shorter, 9 full as long as 8. 

 Thorax with an oblong spot on the anterior lobe of the mesonotum, generally ex- 

 te tding from thecollare $ of the way to the hind angleof the lobe, rarely cover- 

 ing almost its entire surface, the interior J of each'lateral lobe and sometimes 

 its entire surface, base and tip of the scutel and rarely its entire surface, anteri- 

 or disk of the metanotum, and the edges of the basal plate that border on the 

 basal membrane, or rarely the entire surface of the basal plate, all black. Cen- 

 chri whitish. A more or less distinct black cloud on the pectus, and another on 

 the posterior disk of the pleura, the former occasionally obsolete. Abdomen with 

 that part of the anterior edge of joint 1 that borders the whitish basal mem- 

 brane, or rarely the basal h of joint 1, black. Ovipositor honey-yellow, its sheaths 

 dusky. Cerci full as long as the last tarsal joint of the hind legs, honey-yellow, 

 lightly tipped with dusky. Legs honey-yellow, the tarsal claws dusky. Wings 

 hyaline; veins black; those on the costa, as well as the basal \ of the stigma, 

 whitish or yellowish: the rest of the stigma dusky. Length J .17 — .22 inch ; 

 front wing $> -18 — .24 inch. 



% Differs from the normal <j? only as follows: — 1st. The ground-color is 

 greenish-white, not honey-yellow. 2nd. The black spot enclosing the ocelli is 

 larger, and is separated from the eyes only by a narrow orbit and occasionally 

 touches them for a small space. Zrd. The occiput, except the orbit, is distinct- 

 ly black, -ith. In the antennae the pale colors are more dominant, and verge 

 more or less on greenish-white; and the antennse are J (not 3-aths) as long as 

 the body. bih. The thorax is black, except the tegulre, the superior margin of 

 the collare and the cenchri, which are all greenish-white. 6th. The abdomen 

 is black above, greenish-white below, the lateral plates basally Mack, but ter- 

 minally clouded with the pale color. Basal membrane white. 7th. The legs 

 are greenish-white, sometimes, especially the hind It gs, more or less honey-yel- 

 low. In the hind legs the base of the cox <\ the extreme tips of the femora and 

 the tarsi are more or less fuscous. Sth. The veins on the costa are scarcely 

 whitish, and only the extreme base of the stigma is whitish. Length % .10 — 

 .17 inch; front wing % .11 — .19 inch. 



Ten % , five J , bred April 1G — 27.. Absolutely undistinguishable 

 by any reliable character from the inquilinous Euura perturbans n. sp., 

 u. v. Distinct at once from E. s. gemma and from E. <>rbi!<ili.< Nbrt., 

 by the abdomen 9 being honey-yellow above and below, and by the 

 abdomen % having its lateral plates partly pale, and the venter entire- 

 ly pale. 



