1911] Study of Caterpillars of Sphingidae 267 



Herse. I cannot distinguish Herse from Sphinx by any 

 satisfactory characters. The head in both convolvuli and 

 cingulata is intermediate between those of drupiferariim and 

 the other Sphinxes. Setae i and ii of the labrum are about f 

 as far apart as the distance between the two setae i, and i is 

 but little higher than ii. The two main joints of the antennae 

 are practically equal. In the only specimen of H. cingulata I 

 have seen the horn is very short, but this may be an abnormal- 

 ity; it is normal in H. convolvuli. 



Dolba. The head does not taper decidedly toward the top, 

 and is decidedly granular, the setag rising from the apex of the 

 widely separated granules, as in Smerinthus. Otherwise it 

 agrees with those species of Sphinx in which the labrum is not 

 deeply notched. The head comes surprisingly close to that of 

 Darapsa, but may be distinguished by the decidedly higher front, 

 and the fact that iii of the labrum, as in most Asemanophorae, 

 is nearer to the level of vi than ii. I, Figs. 39-41 represent not 

 this species but Sphinx gordius. 



Atreides has a very similar head. The supraanal plate is an 

 equilateral triangle; the markings are picked out with raised 

 granules, and there are several transverse rows on the thorax, 

 and scattered granules on the abdomen as in Smerinthus, but 

 very widely scattered and small. 



Acherontia. Has a slight transverse hump on the meso- 

 thorax (suggested in some Sphinx) ; the tip of the horn is recurved 

 sharply; the fine annulations are wanting from the thorax. 

 Otherwise entirely like Sphinx (e. g. S. kalmiae). A. atropos 

 examined, European. 



Ceratomia. (sens, str.) Head about as wide as high, decidedly 

 tapering, somewhat granulated in back, but with the setas not 

 springing from the granulations, structurally as in the lower 

 species of Sphinx. Body densely granulated, with the sub- 

 dorsal and obliques picked out in raised granulations, and also 

 with a mid-dorsal row. The subdorsal row is produced on the 

 meso-, and metathorax into two pairs of short soft horns. 

 (I, Figs. 45 and 49.) Aside from subfamily characters, I have 

 seen no trace of kinship between this species and Daremma. 

 The latter seems to come closer to Chlaenogramma. 



Daremma. Skin smooth; horn normal, rather slender and 

 short; or longer but very slender (catalpce). Head slightly 

 granular, but the setae do not rise from the apex of the gran- 



