212 



PSYCHE. 



[March 1895. 



DESCRIPTION OF SOME OF THE LARVAL STAGES OF 

 AMPHION NESS US. 



BY CAROLINE G. SOULE, BHOOKLINE, MASS. 



This description is taken from two larvae 

 found feeding on Ampelopsis Veitchii, in 

 Brookline, on June 20tli, 1S94. 



Length of larva one-half inch. Head 

 rather fiat, and held with the mouth parts 

 far forward instead of downward, giving a 

 great slant to the head. It was green with 

 a faint yellow line on each side, and a deep 

 median suture. Body green, smooth, with 

 sparse hairs hardly to be seen without a 

 glass. It had a darker green dorsal line, 

 and on eacli side a 3'ellow subdorsal line 

 extending from the head to the base of 

 the caudal horn. Pale obliques were faintly 

 indicated. Feet and props green. Caudal 

 horn long, slender, pink, paler beneatli. 



June 2^tk. — Moulted. Three-fourths inch 

 in length. The head was slightly bilobed, and 

 all the marks were more distinct except the 

 obliques. Feet and props green. Caudal 

 horn shorter, stouter, dark at tip, and 

 •lightly rough. 



yu7ie 3gth. — Moulted. Lengtli one and 

 one-eighth inches. Head very round, bilobed, 

 granulated on the sides; suture greener and 

 deeper; face-lines opaque yellow wliite, the 

 space between them being without granu- 

 lations. Body green with yellow white 

 granulations, and a dark green dorsal line. 

 The subdorsal lines were yellow white 

 edged above with dark green, and were 

 not lines of granules. On the thoracic 

 segments were faint indications of lateral 

 and stigmatal yellowish lines. The gran- 

 ules on the body were arranged in trans- 

 verse lines. The obliques Avere clearer, 

 yellowisli with dark green above, the last 

 pair extending up the sides of the caudal 

 horn. There were still a few hairs near 

 the mouth, on the feet, and near the sub- 

 ventral line of the thoracic segments. The 

 feet and anal props were green. The 



abdominal props were green with a pink 

 band near the tip. Anal shield edged with 

 yellow white. Caudal horn short, stout, 

 rough, — almost triangular in shape, — red 

 above, pink beneath, with a deeper red 

 line from the dark dorsal line to the tip of 

 the horn. The third and fourth segments 

 were a trifle larger than the others. 



yuly 2nd. — Moulted. One and one-half 

 inches long. General effect pale brown 

 granulated with yellow, each granule hav- 

 ing a black dot in the centre. Head 

 bilobed, dark brown between the face lines 

 and there granulated with black and a few 

 yellow granules. Outside the face lines 

 the granules were all yellow. Body pale 

 brown with numerous black spots and 

 yellow granules. Dorsal, subdorsal, lateral, 

 and stigmatal lines on the thoracic seg- 

 ments. On the abdominal segments the 

 dorsal line was represented by a black 

 patch at the juncture of every two segments. 

 The obliques were very dark, almost black, 

 each ending, at the upper end, in a spot 

 not quite round. There were nine obliques, 

 beginning on the third segment; the eighth 

 extending up the caudal horn, and the 

 ninth crossing the spiracle under the caudal 

 horn. Caudal horn short, stout, black, 

 rough, very small. Spiracles black with 

 a slight yellow encircling line, and a tiny 

 yellow dot at each end. Anal shield darker 

 brown than the body, and with the dorsal 

 line extending to its tip, and the sublateral 

 lines indicated. Edge yellowish. Feet and 

 props brown. Anal props darker brown. 

 The third and fourth segments were very 

 slightly enlarged, suggesting A. Myron, 

 while the larvae, in this stage, twitched 

 and jerked from side to side when dis- 

 turbed, as violently as T. Abbotii. 



yiily lotk. — The larvae measured three 



