124 LEPIDOPTERA. 



On the wing from the middle of June to the beginning of 



August. 



Larva. "The full grown larva is 42 to 46 mills, long" 

 (about If inch), "It has no resemblance whatever to any 

 larva of Hadena or Folia that I know. The hinder segments 

 gradually but perceptibly diminish in breadth after the 

 seventh or eighth. The colour is dirty-white with a shade 

 of grey, the head chestnut-brown ; the plates of the thoracic 

 and anal segments and the anterior feet yellowish. The 

 labrum and eye-marks are rather dark, and just where the 

 hemispheres join are two dark spot-like depressions. The 

 head is scarcely half as broad as the following segment 

 which on the upper side is entirely overlaid by the ex- 

 ceedingly strong thoracic plate. The anal plate is very 

 strong, in form a somewhat elongated semicircle and bears 

 as usual eight hairs. The second and third segments bear 

 on the upper side several very obscure dark spots which 

 are scarcely distinguishable from the ground-colour. The 

 slightly raised spots always bear a long reddish hair spring- 

 ing from a dark speck. The rudimentary stigmata are 

 always very distinct on the twelfth segment, and mostly 

 appear close under the fore part of the anal plate." " With 

 the exception of the darker head and lighter anterior feet, 

 the colour and position of the spots in the young larva, when 

 it comes from the egg, are exactly like those of the full 

 grown larva. The first pair of prolegs are not much shorter 

 than the hinder ones." (Staudinger.) 



August to May or the beginning of June, but, at least 

 sometimes, to May of the succeeding year, or two years. On 

 grasses. Dr. Staudinger's details are again of great interest. 

 " By means of very zealous raking in the high moss, early 

 in May near Reykjavik, we found in all about thirty larvEe of 

 various sizes. Some appeared to be full grown, some were 

 hardly half so large, and others still smaller. All were 

 decidedly healthy and the smaller ones increased visibly in 



