220 Transactions. — Zoology. 



The young insect has no general peculiarities of form calling for renaark, 

 but is readily recognized by its edge, along which is a row of the curious 

 club-shaped spines visible in the adult, and figured in vol. xi., pi. vii., fig. 

 16d. But whereas in the adult insect these club-shaped spines are alter- 

 nated with sharp ones, in the young the sharp spines are absent. The 

 length of the body is about -^^ inch. 



The male insect undergoes its transformations in a test similar to that of 

 the female. At least my specimen was hatched from a leaf of Drimys from 

 Lyttelton on which there were a number of tests (perhaps fifty), and I was 

 unable to find any difference to show which were tests of males. The 

 insect is about -^ inch long, exclusive of the abdominal spike ; greenish in 

 colour : form generally normal. Antennae 10-jointed : the first two joints 

 very short, the rest to the seventh much longer and equal, the three last 

 somewhat shorter and equal. All the joints have several hairs. Foot 

 normal ; four digitules, all fine knobbed hairs. Wings rather long, hyaline. 

 Abdominal spike about half the length of the abdomen. From the last 

 segment of the abdomen spring two very long white setffi. 



This species is more common than I imagined when first describing it. 



I have seen plants of Drimys on the hills over the town of Lyttelton with 



every leaf covered thickly with the tests of I. i^atella, so thickly indeed, as 



to make the whole under surface of the leaves look white. 



2. Inglisia leptosperini, sp. uov. 



Figs. 9-17. 



Test white, glassy or waxy, elongated, convex above, flat and open 



•beneath, formed of several agglutinated segments, each segment more or 



less convex or conical, median segments usually five in number ; at the 



edge an irregular fringe, as in C. perforatus, but the fringe is often absent. 



Average length of test -^ inch. 



The test, though preserving the same general form, is subject to minor 

 variations, as shown in figs. 9 and 10. * I rather think that fig. 9 is a 

 younger form than fig. 10, and that the little secondary tests shown in the 

 former become more closely agglutinated with age. 



Each segment of the test is marked with grooves and strise radiating 

 from the centre, as in the single test of I. patella. The stria, which widen 

 from the apex to the base, are composed, as in the former species, of per- 

 forations containing air. 



The female insect (figs. 11, 12, 13) fills the test in the adult stage, but, 

 as in most of the Lecanio-diaspid^, becomes when old, and after propaga- 



* Fig. 10 is slightly incorrect : the segments of the marginal fringe are shown too 

 small and regular. 



