1616 The Zoologist— April, 1869. 



later the yomig larvae had tnade their appearance, and were ranged 

 so closely together along the margin of the leaf (fig. 2) that each 

 seemed to grudge the other the space it occupied, most of them 

 having only room to hold on by the six thoracic legs ; the anal 

 extremity was almost continually in motion. About fourteen days 

 later they were nearly full grown, when it was apparent that they 

 belonged to the same species as those taken at Warmoud : on attain- 

 ing their full growth they were, however, nearly half as long again, 

 being about 15 mm. These larvaj also produced the same imagos. 

 The perfect insect is 8, 9, 10 or 11 mm. long ; the male is smaller and 

 darker colo\ned than the female. In both sexes the head is brownish 

 black as far as the mouth, which is yellow ; the antenna; are yellow 

 underneath, the upper surface being fuliginous ; the eyes are brown, 

 and are surrounded — especially in the female — by a yellow border ; 

 the ocelli are topaz-coloured. Prothorax bright yellow, with a brown 

 spot in the middle of the neck ; mesothorax black, with some brown 

 at the side in the male, which is replaced by a yellow spot in the 

 female ; metathorax brown-black (yellow beneath in the female.) 

 llartig speaks of a little yellow spot on the scutellum : 1 have not 

 been able to observe this in my examples, which were taken inland. 

 The cenchri are clear white. The female has the abdomen entirely 

 orange ; in the male this part of the body is spotted with brown or 

 black on the dorsum, generally on the first two and the seventh 

 segments. In the female the legs are yellow with brown claws, the 

 posterior tarsi being brown on the upper side ; in the male the bases 

 of the posterior coxae are black, the rest of the leg being entirely 

 yellow, the brown lint being scarcely perceptible on the posterior 

 tarsi. Wings transparent, with a yellow tinge in the female, and 

 having a brownish purple glow at the base in the male ; the costal 

 nervure and the stigma are yellow, the latter being purplish at the 

 base in the male. The nervures of the wing are of various tints of 

 brown. The ovipositor and saw of the female are of the most simple 

 structure, and offer nothing to call for special remark (see fig. 8). I 

 may add that on the occasion of the excursion of the Netherland 

 Entomological Society, in August, 1863, I saw the larva of this species 

 in great numbers on a row of poplar trees not far from Wassenaar, 

 near the villa of Ryxdorp. 



