278 THK ENTOMOLOGIST. 



relieving the body. I was only able to note that when they 

 required no more food they escaped by a hole which had 

 been gnawed iu the gall, and hid themselves in the mould, 

 where they spun a small oval cocoon of grains of earth. I 

 first observed the imagos in the beginning of May ; these 

 were males. The females did not make iheir appearance till 

 about twelve or iburteen days later. The following is a 

 description of the sexes : — 



Male. — Length five millimetres (see fig. 6). Head very 

 broad, with projecting eyes, shining black, wrinkled on the 

 vertex about the three ocelli. Trophi brownish white, apex 

 of the mandibles brown, palpi gray. Antennae entirely black, 

 nearly as long as the body, moderately thick, and covered 

 with a microscopic pubescence. Thorax shining black, 

 excepting the extremities of the protlioracic lobes and the 

 tegulae, which are pale brown, and the cenchri, wl)ich are of 

 a gray colour. Abdomen conical, with a carenite elevation 

 on the dorsum, shining black, excepting the valve of the 

 anus and generative organs, which are sordid orange (see 

 fig. 8). Wings iridescent, costal nervure and stigma sordid 

 yellow or gray, the other nervures black. Coxae black; 

 femora reddish yellow, with a black longitudinal line on the 

 under side commencing at the base, but not reaching the 

 apex ; tibiae pale orange, the posterior pair having the apex 

 black (fig. 7) ; anterior tarsi reddish yellow, with the last two 

 or three joints brown ; posterior tarsi black. 



Female. — Broader and more robust than the male, so that 

 being of the same length it has the appearance of being 

 shorter (see fig. 9). Head more projecting in front, so that 

 it is more quadrangular; forehead smoother, black. Trophi 

 the same as in the male. Antennae somewhat shorter and 

 thinner, black, glabrous. Thorax black, with broader orange- 

 coloured extremities o( the prothoracic lobes; tegulae also of 

 the last-named kind; cenchri dark gray, almost black. 

 Wings iridescent, with pale yellow costal and post-costal 

 nervures and stigma, the last named being particularly large; 

 the remaining nervures blackish. Coxae black, with yellow 

 tips; femora and tibiae orange, the four anterior femora with 

 a small black longitudinal line underneath ; apex of posterior 

 tibiae brown ; three joints of the anterior and intermediate 

 tarsi and the posterior tarsi entirely dark brown. Abdomen 

 orange, excepting the first two segments and fasciae on the 



