56 



represented in figure 25. Even this dark form is subject to great variation, some 

 specimens entirely lacking the line along the back, and having the spots of different 

 shape." 



The body tapers as in D. Chamcenerii. The larvae of this genus, when disturbed, 

 fall from their food plants, shorten the anterior segments, and bend the head inwards. 

 Length when full-grown is about three inches ; the caudal-horn is rough, and yellowish- 

 orange towards extremity. It is rather a general feeder, being found on the common 

 purslane — Portulacca oleracea — turnip, buckwheat, apple, grape and watermelon. 



The larval transformation is made in a superficial cell excavated from the surface, 

 where it changes into a light brown chrysalis from which the moth appears in September. 



Fig. 26. 



This moth (figure 26) is known as the white-lined morning sphinx. It is very 

 common, and has a wide range, being found in all parts of the United States, Mexico 

 and the West Indies, as well as in Canada. Of the two species of Deilephila, lineata is 

 more common in this Province, and Chamcenerii in Quebec. 



It flies generally at twilight, although it may be occasionally noticed in the early 

 part of the afternoon, in the sunshine, hovering like a humming-bird over the verbenas 

 and phlox. 



The moth has the head and thorax dark olive, with a white line on each side. The 

 general ground colour is a rich greenish-olive, tinged with reddish at the sides ; on the 

 front part of the body are six longitudinal stripes, while the hinder part is spotted 

 laterally with black and white. The fore-wings deep olive coloiir, with a straight buff- 

 coloured band extending from the base to the tip ; on the outer margin another band of 

 nearly same width, but less distinct colour ; the veins are lined with white ; the hind- 

 wings black, small, with rose-coloured central band, including a white spot near the 

 inner margin, and a marginal reddish line ; fringes white. Expands about three and a 

 half inches. May be readily distinguished from D. Chamcenerii by its larger size, and 

 hy the white veim in the fore-wings. 



11. Chgerocampa tersa, Linnaeus. 



Sphinx tersa, Drury. 

 " " Eabricius. 

 " " Cramer. 

 " " Smith & Abbot, Ins. Ga. 

 Chcerocarapo tersa, Walker, C. B. M. Lep., Part YIII., p. 131. 

 " Clemens, Syn. N. A. Sph. 

 ^ " " Morris, Syn. N. A. Sph. Sm. Ins., p. 171. 



" Grote, 1865. 



Mature larva. — Light green, with a large subdorsal crimson ocellus on the fourth 

 segment, containing a blue ring and edged with black and white rings, with six others 



