518 



COLLEGE OF AGRICULTURE 



ventral margin of the genae. A crescent-shaped row of five 

 small tubercules just at the base of the pailps. Length of head 

 from apex to edge of labium, 4 mm.; width, 3.5 mm. 



Body, greenish straw yellow, marked with dark reddish-brown 

 and chrome yellow. Sides of entire body covered with, fine 

 brown dots. First thoracic segment with a short transverse 

 ridge, yellow, marked with two lateral brown spots. Two faint 

 median dorsal brown lines on thorax II and III. Thoracic legs 

 a light brown, a shiny black spot on the outer aspect of the 

 second segment. 



Dorsal portion of abdomen marked with one median light yel- 

 low line, with two parallel chrome-yellow lines on either side. 

 Abdomen III with two dorso-lateral spots of deep brown. Abdo- 

 men rv with a median spot of same color, and abdomen V with 

 a similar V-shaped marking. Two smaller median spots on 

 abdomen Vll and VIII. Lateral dark broiwn markings consist- 

 ing of three pairs of stripes extending from the lateral line to 

 the base of thoracic leg III, and pro-leg I and IV. The ends of 

 all the pro-legs marked with the same color. A ventro-lateraJ 

 spot on abdomen VII. With the glass may be seen a very 

 sparse covering of fine hair. Total length 40 mm. Greatest 

 width at segment IV, 5.5 mm. 



A. comparison of a second type shows a great reduction of the 

 brown color. The general tone is lighter, eyes marked with an 

 inner line of black and an outer of brown. No other brown on 

 head or body except a small V on abdomen IV, andi a sparse 

 sprinkle of brown dots on the sides. End of feet and pro-legs 

 black. The yellow markings similar to above, but lighter. 



Mature Larva. Despite the fact that such a large amount ol 

 variation occurs in the intermediate larval stages, we find that 

 the last stage before pupation is fairly constant as to the gen- 

 eral color pattern. The body assumes a dull, dirty green color, 

 and becomes short and thick. All of the brown, saddle-shaped 

 markings are lost, the only trace of brown being a number ot 

 fine dots along the sides of the body, and in many instances 

 even these are not present. As a rule, however, the brown is 

 replaced by a dorsal band of white and two lateral bands of tlie 

 same color. But little, if any, food is taken during this stage, 

 the larva changing in a few days to the pupa. 



Habits of Lar.vae. Our attention was first called to the depre- 

 dations of this larva by Mr. Eliot C. Clarke of Boston, whoso 

 summer home Is near Tamworth, New Hampshire. Mr. Clarke 

 informed us that a vast colony of green worms had suddenly 



