276 



PSYCHE. 



[June 1892. 



front one-fourth width of head, of equal 

 width, frontal bristles stronger, two orbital 

 bristles directed strongly forward ; third an- 

 tennal joint not so narrowed, palpi and labella 

 more yellow. Macrochaetae of abdomen 



like bristles, which latter are very much 

 weaker; claws and pulvilli only a little elon- 

 gate. Abdomen less conical and nearly as 

 wide as thorax. 



Length of body, nearly 7 mm.; of wing, 



more differentiated from the macrochaeta- 6 mm. 



THE EARLY STAGES OF NERICE BIDENTATA. 



BY CAROLINE G. SOULE, BROOKLINE, MASS. 



The egg, found on the under side of an 

 elm leaf, Aug. 9, 1891, was hemispherical, 

 the flat side being attached to the leaf. It 

 was greenish yellow with a whitish bloom 

 over it, and was very like the egg of Nadata 

 gibbosa. It hatched on Aug. 13th. 



The youug larva was £ 6 inch long, of a 

 deep green color, and with sparse hairs. 

 Head brown, lighter on the median suture. 

 The fifth segment had a dorsal and sub- 

 stigmatal spot of shining brown, and the 

 nth segment had a dorsal spot of the same 

 color. The feet and props were shining 

 brown in color. Anal props were very 

 slender and were raised when the larva 

 walked. The body, at rest, was arched 

 between the feet and abdominal props, and 

 between the abdominal and anal props. 



Aug. 16. 1st moult. Length £ inch. 

 Head large, almost round, bilobed, pale 

 olive green with dark green face-lines. 

 Body pale glassy green, darker on the dor- 

 sum. The glassy effect was striking. 5th 

 segment had a large brown double tubercle 

 on the dorsum, and a substigmatal, smaller 

 one on each side. The tenth segment had 

 a substigmatal brown patch on each side, 

 and the nth a brown single tubercle or 

 hump, on the dorsal line. Feet brown. 

 Anal props striped with brown ; abdomi- 

 nal props brown. Very short, sparse hairs 

 all over the body. Head very smooth. 

 Body arched when at rest, as before. 



Aug. 20. 2nd moult, § inch long. Head 

 much larger than 1st segment, clear green, 

 glassy, with brown face-lines. Body glassy 

 green, translucent, with very few hairs; a 



faint white lateral line, and a brown, broken 

 substigmatal line appeared ; the brown sub- 

 stigmatal patches on 5th and 10th segments 

 were as before. 5th segment had a large 

 double hump, tipped with brown, nth had 

 the large single hump as before ; 4th and 

 6th had each a double wart on dorsum. 

 Feet brown and shining. Props pale brown 

 banded with dark brown. Anal props 

 slender. Rested arched as before. Ate the 

 leaf from the edge to the mid-rib at the tip, 

 and rested on the bared mid -rib. Aug. 21. 

 The marks had grown clearer and each 

 segment from 6th to toth showed a small 

 brown-tipped wart on the dorsal line, and 

 from each wart a white oblique line ex- 

 tended downward and backward, on each 

 side. On the first 3 segments a white sub- 

 dorsal line appeared. The effect of the dor- 

 sal line was that of the edge of a serrate leaf. 

 Aug. 23. 3d moult. I in. long. Head 

 large, round, bilobed, smooth, green with 

 dark face lines. Body green, with a broken, 

 brown substigmatal line edged above with 

 yellow, and a double yellow stigmatal line. 

 First three segments had a double white sub- 

 dorsal line. 4th segment had a double dor- 

 sal hump, tipped with brown ; 5th, a much 

 larger double hump, yellow green, tipped 

 with brown, the brown extending down the 

 front and back like a dorsal line lifted by 

 the hump! 6th to 10th segments had simi- 

 lar humps, but smaller, like that on 4th. 

 nth segment had a large single hump with 

 brown tip. From all these humps extended 

 oblique white patches. Feet green with a 

 dark, vertical line. Props pale brown 



