Cbe Canadian Entomologist 



VOL. XX. LONDON. JANUARY, 1888. No. r 



DESCRIPTION OF THE PREPARATORY STAGES OF 

 ARGYNNIS ATLANTIS, Edw. 



BY W. H. EDWARDS, COALBURGH, W. VA. 



Egg. — Conoidal, truncated, higher than broad, the base somewhat 

 rounded; marked vertically by 14 ribs, one half of which reach the sum- 

 mit, the others nearly as far ; the spaces between the ribs broad, excavated 

 and crossed by ten or twelve fine ridges ; the micropyle at top in centre 

 of a rosette of five minute fiat cells ; and about these are successive 

 irregular rings of cells, each larger than the one next within, to the verge 

 of top ; these are six and five sided, and some are sub-triangular, 

 deeply excavated ; color greenish-yellow when first laid, soon turning to 

 brown. In shape, this egg is like that of other species of this genus, but 

 it is characterized by fewer ribs than any with which I am acquainted. 

 Duration of this stage 16 to 18 days. 



Young Larva. — Length .06 inch; cylindrical, even; color of dorsum 

 yellow-green, of sides and lower parts more yellow ; marked as in other 

 species of the genus by longitudinal rows of flattened tuberculous brown 

 spots, there being three on either side over spiracles, each of which gives 

 one or two long tapering hairs ; below the spiracles is another row of 

 similar spots, smaller, and on part of the segments broken into four spots, 

 each with its hair ; on dorsum of 2, an oval spot of same character as 

 the others, with a row of hairs in front which are bent forward over the 

 head, and a shorter row behind these ; this oval spot corresponds to the 

 four upper spots of the odier segments ; on the side is one spot above 

 and another below spiracle, each with two hairs, and over the foot a 

 smaller one, also with two hairs ; on 3 and 4 each is an additional spot 

 below spiracle, the three, on 2, 3, 4, making a demi-row ; head obovoid, 

 black, shining, with many long hairs. The larva hibernates directly from 

 the egg. 



