10 



[January, 



On the 1st and f?nd thoracic and 0(h ahdnminal segment the white lines 

 coalesce. The two lines and vessel occupy about a fourth of the toial width in 

 dorsal view. The supra-anal spines project about 0-5 mm. beyond the anal 

 prolep-s and end in two bluntly conical points with red tips. There are 7 pairs 

 of pro]ei;s. No hairs visible when viewed under a good hand-lens. Head 

 light brown, almost green ; eyes black, a brown shade of about their own width 

 e.xteiids from them upwards, half-way to vertex True legs nearly cohnuless. 

 Below the eye a dark dot represents the antenna. The antenna is a flat plate, 

 hardly, if at all, raised above the surface, oval, with its long axis horizontal, 

 i.e. at right angle with the line joining the antenna and eye, about 0-lmm. 

 long and '0-06 wide. When mounted, it shows five joints, separated (except 

 the first and second) by colourless lines, each possessing certain clear points, 

 indicating hnir-origins (hairs obsolete). The numbers of these vary in different 

 antennae. The 1st j.iiut has oiie on the upper margin of its posterior angle, 

 the 2ud has o:ie close to its posterior angle, then we have three clear lines 

 marking off the three further joints; anterioi'ly these lines are very close 

 together, posteriorly they are apart enough to leave room for the hair-bases, 

 two large and a smaU one on the ;5rd, a large and a small one on the 4th, and 

 on the 5th two to four; the 4th joint may have one or two minute points' just 

 above the oth, and there are other variations. 



There are a few very minute hairs near the eye, and also on the apparently 

 tubercular portions of tlie body, on tlze prolegs, and rather more and ratlier 

 larger on the last segment or two. 



The cocoons were placed on or between the leaves of the food-plants and 

 are n,ade of a bright yellow silk, much the colour of that of the silkworm- 

 moth, Bomhyx niori. 



From a captured larva I bred a Tachinid. Unfertilized eggs laid in con- 

 hnement enabled me to rear about two dozen flies, all males. This was much 

 greater success than I have usually had in trying to rear sawflies from eo-os 

 hud in captivity, the cut twigs on which they are laid us.uxlly withering Tnd 

 tlie eggs dying before the time for their hatching arrived. 



The skin-sculpture on the dark areas of the larva consists of very numerous 

 black dots, which range tliemselves along the sides of the white bands almost 

 into cells like tlio.e of P. olu,o.pa^s, showing here even the blaclc dots dividing- 

 the cells. As m otiier of the species here dealt with, the pale areas reveal no 

 scul])ture. 



Pteronidea hypoxantlms Forst. 



S;;lif-T Ian ae found feeding on a very smooth-leaved sallow. In August 



nidd le f-"T%" T:- ■?'' -""'^^^^^ ^^^^ ^"^^^ -^- - --^1 hole in^he 

 n ddle of a leaf, and beside this and others hardly larger, an empty egg-«hell 



Xt't: tl" ^^"f r'^,r' ^'^ '''''■ '''' ^^-^^-^ --^d quit' willing to 

 tw c t r "r ; : ''' '"" ^•^■"""' '^"^ ^^ "-* ^-- t^-' ---d once or 

 except on the margin of a hole, never on the edge of the leaf except under a 

 certain amount of compulsion in confinement, ^but rarelv then By laSn: 

 -uad the margi:. it gradually enlarges the hole. It has twenty legs, and Sl: 



