14 Transactions. — Zoology. 



which are generally largest near the margins of the segments. 

 Length of test often reaching ^in., height from i\;in. to -i-in. 

 Texture glassy, very thin and brittle. 



Test of male elongated, elliptical, only slightly convex ; 

 segments large, striated; fringe conspicuous; colour greenish; 

 texture glassy, very thin and brittle : length about ^^^in. 



Adult female greenish or brownish, filling the test previous 

 to gestation, afterwards shrivelling. Margin set rather closely 

 with conical spines. Antennae of six joints, the first two 

 short, the third almost half as long as the w^hole antenna, the 

 fourth and fifth equal and rather longer than the first, the 

 sixth rather more than half as long as the third. On the 

 .sixth joint several hairs, of which one is much longer than 

 the rest. Foot normal : digitules four, the lower pair being 

 rather widely dilated. Anogenital ring with six hairs. Ab- 

 dominal lobes rather large. On the dorsum are a great num- 

 ber of tubular spinnerets, and also (mostly on the posterior 

 region) groups of large, simple, circular orifices. Mentum 

 dimerous. 



Female of second stage light-brown or with a greenish tinge. 

 General form elongate-elliptical, the dorsum raised to a narrow 

 ridge. Abdominal cleft and lobes conspicuous. Spiracular 

 spines rather long, and there are a few other small marginal 

 spines. Length about Ys^n. 



Larva greenish-yellow, elliptical, naked, active ; length 

 about -g'gi'^^. Antenna of six joints, the first five short and 

 sub-equal, the sixth nearly as long as the rest together. Feet 

 rather thick ; tibia rather more than half as long as the tarsus. 

 Abdominal cleft short, with a small brush-like group of hairs 

 from the anal ring; dorsal lobes rather large, with long setae. 

 Mentum large, dimerous. 



Adult male brown, patched with green. Length of body 

 (exclusive of abdominal spike) about xVi^^- Antennae of ten 

 joints, the first two very short, the rest long and slender ; the 

 fourth, fifth, and sixth are the longest, the tenth fusiform ; all 

 the joints bear several hairs, and on the last there are three 

 long hairs bearing knobs at the end. Dorsal eyes, four; 

 ventral eyes, four : ocelli, two. Abdominal spike long, and 

 slightly dilated at three-fourths of its length ; the basal tubercle 

 bears four short setse. 



Hab. On Fagus var. sp., Eeefton district. New Zealand. 



This insect exhibits some characters of both I. leptospermi 

 and /. ornata, chiefly in the varying form of its test. I do not 

 lay much stress on colour, although I have never seen I. lep- 

 tospermi otherwise than pure white or very faint pink, or 

 I. ornata otherwise than brown. More reliable differences are 

 in the six-jointed anteima of the female and the much longer 

 abdominal spike of the mrJe. The large green tests of this insect 



