266 Annals Entomological Society of America [Vol. IV, 



and about J to § its height. Ends of clypeus as wide as 

 £ height of front. Labrum high, with a notch A to J its 

 width, the setae i and ii spaced about in the ratio 1 :2, vi a 

 little nearer in 5. drupiferarum, a little farther off in S. gordius, 

 luscitiosa and eremitus; iii, a little higher than vi but much 

 below ii; notch deep and slit-like in S. gordius and luscitiosa, 

 shallower and more flaring in the others. Mandible with a few 

 (perhaps four, but ill defined) large teeth. Second joint of 

 antenna decidedly longer than the first, and nearly twice as 

 long as wide. First segment of body much larger in diameter 

 than head and more or less enclosing the back of it. Skin 

 entirely smooth, granulated until the last stage; supraanal 

 more or less granulated. Horn normal, much longer than head, 

 and curved downward. The seven stripes similar. 



There is also some variation in the horn. In the majority 

 of species it is cylindrical in the basal part, and strongly down- 

 curved in its entire length; but in chersis the basal part is more 

 often nearly straight, and in gordius it is regularly conical and 

 the whole horn is almost straight. The European species 

 ligustri, which comes next to drupiferarum in the adult, in the 

 caterpillar resembles it closely in markings, but has the normal 

 Sphinx head. (Fig. 1). That of drupiferarum would not differ 

 in face view from Fig. 10. See also I, Figs. 39-41 of S. gordius. 



Lintneria has a conical hump on the mesothorax, which in 

 the next to last stage, and sometimes in the last, is surmounted 

 with a hard tubercle. Otherwise it resembles Sphinx in struc- 

 ture. It is considered a subgenus of Sphinx. (L. eremitus, 

 Fig. 8.) 



Hyloicus. Head rounded and decidledy larger in diameter 

 than the body. Horn straight and slender. Labrum with 

 very shallow widely flaring notch; with setae i and ii nearly 

 evenly spaced; ii much lower than i and the setae i, ii and vi 

 of each side forming an equilateral triangle. Second joint of 

 antennae only half longer than wide, and first joint very short. 

 Supraanal long and triangular. Fig. 10. 



77. pinastri is longitudinally striped with green and white, 

 with a broad red dorsal, or else suffused with red. Horn black. 

 H. cupressi of the southern states is reported as similar, with 

 the white lateral stripes broken into patches; and is probably 

 similar in structure. 



