THE ENTOMOLOGIST. 199 



lavvic of the Acidalioe; grouiKl colour a mediiira shade of 

 brown, with a ver}'' faint pink tinge, and also appears to be 

 slightly powdered with grayish ; head brown, marked with 

 grayish, — from it extends the distinct black double dorsal 

 line; there are no perceptible subdorsal or spiracular lines, 

 but the lateral ridge on each side is faintly outlined with 

 pink ; the ventral surface is a mixture of dull brown and 

 smoke-colour, with a distinct slate-coloured median line. 

 This larva spun up next day, and was the only one I reared 

 to maturity; the cocoon was loosely constructed in an upper 

 corner of the cage. I had no opportunity of describing the 

 pupa until after the emergence of the imago, which event took 

 place on the 18lh of July. Afterwards I found the empty case 

 to be five-eighths of an inch long, the wing-cases jjrominent, 

 and the anal tip sharply cut; colour reddish brown, the 

 wing-cases conspicuously streaked longitudinally with black. 

 — Geo. T. Porrilt ; Hiiddemjield, August 4, 1876. 



Entomological Notes, Captures, 8^c. 



Pieris Rapw var. Aurea. — Upon reading ihe paper, "On 

 the Introduction of Pieris Rapte into Nortii America," by the \ 

 late Mr. E. Newman, I was anxious to discover the origin of ; 

 the yellow variety now found there, and was induced to make 

 experiments with a view to that discovery, and now send you 

 an account of them, together with the results ; but first I will 

 quote Mr. Newman. After speaking of the rapid progress 

 made by this destructive insect, and the ravages it has 

 committed, he says : — "One curious circumstance attending 

 the invasion of this butterfly is that in many parts of the 

 country which it has colonised a new variety of a bright 

 sulphur-yellow, called by Mr. Schudder P. novangliae, has 

 made its appearance. American entomologists are still in / 

 dou\)t whether this is a climatal or food change. It has been / 

 noticed by some of them that when the larvaj hatched from 

 eggs laid by while individuals have been fed upon mignonette, 

 the produce has been this yellow variety ; whether the food 

 was the cause or only an accidental coincidence is still 

 under consideration. We do not know whether the experi- 

 ment of rearing the larvK of P. Rapa) entirely on mignonette 



