166 Transactions. — Zoology. 



broad lateral wings, or lobes, swollen posteriorly; of a posterior 

 appendage {b) divided at the end into three recurved hooks; 

 and of a short penis (c) a little dilated at the tip. Many short 

 hairs on all the appendages. 



Pupa flat, stationary; length about y^in. Viewed dorsally 

 the general colour is yellowish, but from the transparency of 

 the body the green chlorophyll-food may be easily seen ; head 

 darker yellow; eyes obscurely facetted, red; rudimentary 

 wing-covers greyish-white ; antenna? yellow, darker at the 

 tips ; all round the margin is a fringe of long, white, glassy 

 tubes set very close together. Head broader than long, 

 slightly depressed in front. Eyes scarcely prominent. An- 

 tennae of six joints — the first two short, the third equal to the 

 first two together, fourth and fifth short, the sixth almost as 

 long as all the rest together, tapering to a point and bearing 

 at the tip two unequal spines. Eudimentary wing-covers 

 attached to the thorax, but immediately wddening anteriorly, 

 so that they have the appearance of being joined also to the 

 head; the hinder one reaches almost to the second segment of 

 the abdomen. Legs thick ; the second joint of the tarsus is 

 exceedingly small; on the first joint is one long seta bent at 

 the end; claw double, with a large pulvillus. Abdomen as 

 broad as long, margin semicircular, with a very slight median 

 depression ; near the extremity the anal elongated ring is very 

 slightly concave anteriorly, the ends compressed and some- 

 what acute. Eostrum short, cylindro-conical. The fringe of 

 the body and wing-covers is formed of very delicate, glassy, 

 straight tubes issuing from cup -like bases set close to- 

 gether. 



Larva active; length about ^^i^i- J general colour yellow. 

 Viewed dorsally the liead exhibits a darkish patch on each 

 side of a median longitudinal yellow stripe ; the thorax two 

 patches on each side ; the abdomen has four narrow transverse 

 bands and a dark patch covering the posterior half. Antennae 

 of four joints — the first two short, the fourth about equal to 

 the first two, the third as long as the others together ; on the 

 last joint are two unequal spines. Legs thick ; second joint 

 of the tarsus extremely small ; two moderately long tarsal 

 digitules. On the abdomen are some lanceolate spines. There 

 is no tuft of cottoiiy fibres on the abdomen. 



Hah. On Pittosporum cugenioidcs, Discaria to^imatou, and 

 Geniostoma Ugustrifolmm, throughout New Zealand ; probably 

 most frequently on Pittosporum. 



This very handsome species seems clearly to belong to the 

 genus Trioza, but differs in various points from described 

 species. The genital plate of the male bears some resemblance 

 to those of T. horvathi, Low, T. walkeri, Low, and some 

 others ; but the posterior process, with its three hooks, seems 



