82 EUPERIA FULVAGO. 



By previous arrangement, I met Mr. Young in Wad- 

 worth Wood on the 21st of June, 1890, and found 

 that by the time I arrived he had already made a good 

 haul of Euperia fulvago larvae, along with many other 

 species. He had gone the previous evening to " sugar," 

 remained in the wood all night, and commenced to 

 beat for larvae at daybreak. We set to work together 

 at the birches, and I had before long the satisfaction 

 of finding that the " early bird " had not got quite 

 all ''the worms;' for by the time I discontinued 

 beating, a fair number had found their way into my 

 boxes. We were, however, clearly a week too late, 

 as although a few larvae were small, by far the greater 

 part were quite full-fed, and evidently most had 

 already left the trees. 



The full-grown larva is about an inch and a half 

 in length, and of moderate bulk in proportion ; head 

 very slightly narrower than the second segment, the 

 lobes round and polished ; body cylindrical, and of 

 nearly uniform width throughout ; skin soft, and so 

 translucent that the pulsations of the internal vessels 

 can be distinctly seen through it. 



Ground colour pale dingy green, with the appear- 

 ance of having been dusted over with a white powder ; 

 head pale yellow, the mandibles black, and on each 

 side, a little above the mandibles, and towards the 

 outside, is a small red spot ; medio-dorsal and sub- 

 dorsal liDes white ; the spiracular stripe is composed 

 of two waved lines, also white ; this stripe encloses the 

 spiracles, which are white, edged all round with 

 purple; segmental divisions yellow, this colour showing 

 especially when the larva is crawling. 



Ventral area and pro-legs uniformly pale dingy 

 green, the anterior legs still paler, and slightly tipped 

 with black. 



The young larvae found did not appear to differ 

 either in shape or colouring from the adult specimens. 



Feeds on birch, and rests coiled round in the middle 

 of a leaf with the head close to the other extremitv, just 



