THE ENTOMOLOGIST. 199 
larve of the Acidalie; ground colour a medium shade of 
brown, with a very 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 18th of July. Afterwards I found the empty case 
to be five-eighths of an inch long, the wing-cases prominent, 
and the anal tip sharply cut; colour reddish brown, the 
wing-cases conspicuously streaked longitudinally with black. 
—Geo. T. Porritt; Huddersfield, August 4, 1876. 
Entomological Notes, Caplures, Sc. 
Pieris Rape var. Aurea.—Upon reading the paper, “On 
the Introduction of Pieris Rapzx into North 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. novanglie, has 
made its appearance. American entomologists are still in 
doubt whether this is a climatal or food change. It has been 
noticed by some of them that when the larve hatched from 
eggs laid by white 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 larve of P. Rape entirely on mignonette 
