AUGIADES SYLVANUS. 139 



thorax have each two (black bordered ?) lenticles, one on each side of 

 the mediodorsal line, just above and in front of tubercle iii. I saw 

 no other lenticles on the larva. The prothoracic spiracle and that on 

 the 8th abdominal large, the others small and much raised (August 

 1st, 1905). [A week later I again took these larvae out of their 

 tubes of grass, and found that they were both in the second instar.] 

 Second instar: Head black, pitted, with numerous simple hairs. The 

 prothoracic shield black, narrow, with a transverse groove, as though 

 it were situated on two subsegments. Below the shield is a triangular 

 black patch enclosing two brown lenticles. The prothorax apparently- 

 divided into eight subsegments. The 6th subsegment carries two 

 lenticles ; the mesothoraxhas four subsegments, with two lenticles on the 

 3rd subsegment; the metathorax with six subsegments, the first large, 

 while the second carries two lenticles. Normal abdominal segments 

 apparently divided into six subsegments, the first of which is large and 

 carries a lenticle on the dorsum, the second bears a lenticle above and in 

 front of the spiracle which is situated on the 3rd subsegment. Below the 

 spiracle on the flange is a third lenticle. The 10th abdominal segment 

 is very peculiar, being pale-brown in colour and covered with a net- 

 work of darker lines. At first glance the green larva looks as if it had 

 a head at each end. The whole larval skin is covered with small black 

 spicules and also with small black warts, each with one black hair. 

 These warts, however, are arranged in a transverse row along the ridge 

 of each subsegment. The chin-gland is conspicuous just in front of 

 the prothoracic legs. The primary tubercles could not be made out in 

 this instar, which, as will be seen, even from these very meagre descrip- 

 tions, is entirely different from the first instar [Sich, August 8th, 1905J . 

 ? Third instar (three weeks old): 12mm. in length; colour now dull 

 green ; head and thin curved prothoracic collar shining black (Buckler, 

 August 13th, 1876). /Fourth instar (hybernating) : 13mm. in length; 

 shorter, thicker, and more sluggish than when feeding ; also of a more 

 transparent vivid green (apparently no material in alimentary canal), 

 being of a bright grass-green but slightly autumn-tinted at the anal 

 plate. The head nearly black, with a broad brown streak on each side 

 of the face on front view ; this streak triangular in so far that it narrows 

 nearly to a point at the vertex, but here, as well as at its other margin, 

 it is not sharply defined, but shades into the dark part of the head ; it 

 might almost be said that the whole front is brown, as, though there 

 is black medially, it is broken up further by a brown line beside the 

 clypeus and a brown centre to tbe clypeus. The head is finely but 

 deeply wrinkled or pitted, with very fine, nearly white, hairs, arising 

 usually from the bottoms of the pits. Viewed laterally, the larva lies 

 flat on the surface in front, but medially and posteriorly is raised on the 

 very short, broad bases of the prolegs. The head is 2mm. high, the neck 

 I'Smm.j the back then slopes up to 2mm. at 2nd abdominal, hardly falling 

 again to 7th abdominal, whence it rapidly slopes to the anus, which 

 projects nearly 0-5mm. beyond the claspers, so that one looks (from the 

 sides) under it, just as one does under the spaces between the prolegs. 

 The green surface is closely studded with black points, not so closely 

 as to make the larva look dark, but so much so as to give the actually 

 bright green of the skin a slightly dingy hue, when the larva is 

 examined without a lens. There is a distinctly darker dorsal line, 

 and a faintly darker shade about half-way between dorsum and 

 spiracles. There is a fine whitish line running through the small 



