iHE CANADIAN ENTOMOLOGIST. 07 



the cymes of the maple-leaved arrow-wood ( Viburnum acerifolia) just 

 as they are going out of bloom. The fruit of this does not ripen till 

 October, and some larva lives in the fleshy substance in which the thin, 

 flat coriaceous seed is immersed, which is probably that of this Apion, 

 though not yet so proven. This is one of the largest species of the genus, 

 and when beaten into the umbrella behaves and looks so much like the 

 worthless Anthonomus qnadrigibbus, that till the past season it was always 

 rejected. 



DESCRIPTION OF THE PREPARATORY STAGES OF 

 ARGYNNIS HESPERIS, Edw. 



BY W. H. EDWARDS, COALBURGII, W. VA. 



Egg. — Conoidal, round-topped, nearly as broad at base as high, the 

 top depressed; marked by about 19 thin, elevated, vertical ribs, one half 

 running from base to summit, the others but four fifths or more the dis- 

 tance ; the spaces between crossed by many low horizontal ridges ; the 

 micropyle surrounded by two or three circles of very fine depressions, 

 outside of which are rows of very large four or five-sided depressed cells ; 

 color yellow-green. Duration of this stage about ten days. 



Young Larva. — Length .06 inch ; cylindrical, thickest in middle ; 

 color yellow-green ; marked as in the allied species by rows of flattened 

 tuberculous brown spots, each of which gives one or two long, tapering 

 hairs ; on dorsum of 2 a dark oval patch with a row of hairs in front, 

 turned forward, and a shorter row behind ; head obovoid, black, with 

 many long hairs. The larva hibernates directly from the egg. 



After First Moult : Length . 1 inch ; color green, mottled with brown 

 over dorsum ; the under side pale green ; the spines in number and 

 position as at maturity, and as in the genus, small at base, tapering little, 

 wholly black, beset with many short black bristles ; head obovoid, black, 

 with black hairs. Duration of this stage eight days, in April and May. 



After Second Moult: Length .15 inch] color brown and gray; a 

 double indistinct gray dorsal stripe, and a similar one between dorsal and 

 upper lateral spines ; the spines black ; those of the middle row have the 

 bases on outer side pale yellow, of the lower row the bases are wholly 

 pale yellow ; head as before. Duration of this stage eight days, in May. 



