1911] Study of Caterpillars of Sphingidae 271 



Cressonia. With only one large pair of enlarged tubercles 

 on the supraanal plate. Front as wide as high and only one- 

 fourth as high as the epicrania. Entire head tuberculate; first 

 ocellus moved down and posterior one up so that they are not so 

 far apart and as the second and fourth are from each other. 

 Mandibles with a tuft of secondary hair on the outer part of the 

 scrobe. Otherwise as in Dilina. C. juglandis. (Figs. 12 

 and 13.) 



Deilephila (Celerio) (Fig. 9, and I, Figs. 46 and 52). Head 

 distinctly wider than high, rounded on top, roughened with 

 irregular grooves, but not as strikingly as is usual in the 

 Sphingince. Front triangular, the outer edge but little 

 sinuous; clypeus narrower at the two ends than in the Sphin- 

 gittCB. Labrum with a broadly flaring notch only one-third as 

 deep as the height of the labrum or less, setae i and ii about two- 

 thirds as far apart as the setae i are from each other, nearly on 

 a level; vi less than half way up to ii. Antenna with the first 

 and second joints nearly equal in length and diameter. Ocelli 

 with the first four of nearly equal size, in a regular curve, but 

 the second decidedly nearer to the third than to the first. 

 Posterior ocellus about half way between the upper and the 

 lower; the three lower ocelli forming approximately a right 

 triangle. Skin smooth, the tubercles marked by tiny chitinous 

 rings, those of the primaries two or three times as large as the 

 others. Horn normal, moderate, entirely wanting in D. 

 vespertilio. Supraanal broad. Caterpillar as a whole cylin- 

 drical, tapering toward the head, almost always with a conspicu- 

 ous row of subdorsal spots or eyespots, which are all about equal 

 in size except the last. The front is smallest in D. euphorbia:. 



D. lineata, gallii, euphorbiae, lathyri and vespertilio were 

 examined. Aside from those mentioned above the differences 

 come down to a slight variation in the depth of the notch of the 

 labrum; and the markings. 



Chcerocampa (in the broader sense). (Fig. 6.) Head squar- 

 ish, full as high as wide, very finely granular, so as to appear 

 smooth and dull with low power; the region about the setae may 

 be glossy but not raised. Front triangular, wider than high 

 (except in alecto) at least § height of head; posterior ocellus 

 lower making the triangle formed by the three lower ocelli 

 acute-angled; second joint of antenna about twice as long as 

 first; notch of labrum at least \ its height, usually more; i 



