92 THE ENTOMOLOGIST. 



skinfold, pass backwards and upwards just over each spiracle, 

 terininating on the back; the seventh or last of these oblique 

 stripes is the broadest aud most couspicuous ; it is continued 

 faintly into the dorsal horn, which is otherwise of the most 

 delicate blue, the tip tinged with black ; the spiracles are 

 elongate and clear brown, a mere line in the centre being 

 white : the legs are pink, the claspers concolorous with the 

 body, except their prehensile fringes, Vvhich are brown. It 

 enters the earth to undergo its change to a pupa, which is 

 accomplished just below the surface, in an earthen cell, but 

 without silk : the pupa is of a rich brown colour and gla- 

 brous, the extremity furnished with a short horn covered with 

 scabrous points. The perfect insect appears in June. I find 

 this larva every year feeding on the apple trees in my own 

 garden. — Edward Newman. 



Life-history of Pcecilocampa Populi. — The eggs are laid 

 in November and December, three or four together, on the 

 bark of Quercus Robur (oak) and Populus nigra (black pop- 

 lar) ; the larvae have also been found on the Lombardy poplar; 

 the young larva? emerge during the third and fourth weeks in 

 April, and feed throughout the month of May, acquiring their 

 full size the first week in June, when they are an inch and a 

 half in length, and ver}' beautiful and conspicuous objects. 

 The larva then rests in a perfectly straight position on the 

 trunk of the tree or on a branch, seeming to take especial 

 pleasure in sunning itself in some exposed place. I have 

 often seen and admired them while thus reposing on the 

 trunks of oaks in Birch and Darenth Woods, but have never 

 happened to find them on any species of poplar. The head 

 is narrower than the 2nd segment and semiporrect : the body 

 is of nearly uniform width throughout, convex above and 

 flattened beneath : it has on each segment a transverse series 

 of depressed warts ; these are rather more conspicuous along 

 the regions of the spiracles, where each emits a radiating 

 fascicle of hairs, which together form a continuous lateral 

 fringe on each side : the entire dorsal surface appears on a 

 cursory glance to emit hairs, but on close inspection these 

 are generally found to emanate from depressed warts. Colour 

 of the face gray, of the crown ochreous, the entire head being 

 delicately reticulated with black : body pearly gray, varie- 

 gated with ochreous spots, and delicately reticulated through- 



