156 THE CANADIAN ENTOMOLOGIST. 



DESCRIPTIONS OF THREE NOCTUID LARVAE. 



BY HARRISON G. DVAR, NEW YORK. 



The moths bred from the larvas here described were kindly determined 

 for me by Prof J. B. Smith. 



Tceniocampa alia, Guen. 



Stage I. — Head shiny, pale yellow ; mouth orange ; ocelli black ; 

 width, .3 mm. The abdominal feet are well developed only on joints 9, 

 ID and 13, so the larva walks like a Geometrid. Body whitish, appearing 

 green from the food within, with many black, piliferous dots. Joint 1 2 is 

 a little enlarged ; cervical shield coloured like the head, but paler, 

 Length, 4 mm. This larva was found May 3. 



Stage II. — Head shiny, whitish ; ocelli black ; mouth brown ; width, 

 .6 mm. Body dark green above, paler below, enlarged at joint 12 ; the 

 feet on joints 7 and 8 small and unused. A dorsal, subdorsal and stig- 

 matal white line, the latter broad and blending below with the colour of 

 the venter. A number of minute black piliferous dots and a few fine hairs 

 on the head. Length, 6 mm. 



Stage III. — Head dull, pale yellowish-white ; ocelli black ; mouth 

 brown ; width, .9 mm. Body as before, the dorsal and subdorsal lines 

 clear cut. In the subdorsal space are two white spots per segment, each 

 with a minute black centre. The feet on joints 7 and 8 are better 

 developed than in the previous stage. 



Stage IV. — Head dull pale whitish; mouth faintly brownish j ocelli 

 black, ringed with white ; a few pale hairs ; it is partly withdrawn under 

 the skin of joint 2 ; width, 1.6 mm. Body pale, semi-transparent yellow, 

 appearing green. Dorsal, subdorsal and stigmatal white lines, the lowest 

 large and bordered above with dark green. White piliferous dots with 

 minute black centres, about two per segment in each of the spaces. Feet 

 normal, nearly equally developed; joint 12 enlarged. Length, 15 mm. 



I think a stage occurs between stage IV. and the last stage, but I 

 have not observed it. 



Stage VI. (?), last Stage. — Head green, with a few hairs ; marked 

 as before. Body yellowish-green, sprinkled with pale yellow ; a yellowish- 

 white dorsal line, a faint and broken subdorsal line and a narrow stigmatal 

 line above the spiracles, except on joints 2 and 12, where it runs below 



