-11 6 THE CANADIAN ENTOMOLOGIST. 



most carefully examined, they were double on segments eight, nine, ten 

 and twelve upon one side, but only on eight and nine on the other, and 

 on segment five there was no disk of this series on one side, but it was 

 present on the other. On segments two, three and four, they are on 

 supra-stigmatal line. On segments five to twelve, below supra-stigmatal 

 line. On segment thirteen on supra-lateral stripe, larger than the others. 



The second series is single throughout, posterior to the spiracles, 

 except on segments two, three and four, where they are slightly anterior 

 on the fold above the thoracic feet. The third, ventral, series occurs only 

 on segments five, six and eleven, just beneath the stigmatal fold. 



The shape of the larva when mature was different from that of the 

 first stages, the body being largest in the middle and tapering off to each 

 end. The full-grown larva measured one inch and one -eighth on Septem- 

 ber 12 (twelve days after the last moult). After this, it fed sparingly for 

 about two weeks, and then spun a mat of silk on the face of a blade of 

 grass and drew two other blades over it with single strands of silk. The 

 furrow down the face deepened and appeared to open a little, and I felt 

 sure pupation was going to take place. This, however, was not the case, 

 and two days later the larva left the grass and spun another mat on the 

 sloping side of the lamp chimney. It now ceased to eat, and the colour 

 changed gradually, all the green fading out, and in ten days the body was 

 9f a yellowish cream colour with white stripes. This again darkened 

 until the ground colour was a very pale brown or dove colour. The 

 moisture which condensed on the side of the glass kept the lower part of 

 the larva's body constantly wet ; but I did not like to risk removing it, 

 as 1 looked for pupation at any day. After remaining still, and evidently, 

 in hibernation for about five weeks, I found it had fallen from its mat to 

 the ground on 29th October. After about a fortnight discoloured spots 

 began to appear, and I found it was dead. It was at once put into 

 alcohol for preservation and examination. 



These larvae fed freely on all grasses offered to them, but seemed to 

 prefer wide-leaved species ; this, however, may have been an instinctive 

 preference for protection, both from the shape of their bodies and the 

 coloration, added to a habit of lying extended down the midrib with the 

 body closely appressed, the lower part of the head protruded, and the 

 apex drawn back, these larv^ are well hidden from observation. The 

 favourite grasses were Fanicum crusgalli, P. sanguiiiale and Triticum 

 rtpais. 



