264 Annals Entomological Society of America [Vol. IV, 



Deilephila comes as near as that of Hemaris, to it. Hemaris 

 croatica is an almost perfect connecting link between Hemaris 

 and Macroglossa. Altogether a tabulation of the genera which 

 shall be workable must be mainly artificial in its arrangement. 



THE GENERA (AND SUBGENERA) OF SPHINGIDAE. 



1. Head high and triangular, no horn Lapara 



1. Head rounded, or horn more or less developed 2 



2. Head half higher than wide, horn well defined, enlarged tubercles on anal 



plate 3 



2. Otherwise 4 



3. Four tubercles on anal plate, face smooth (Dilina)* 



3. Two tubercles on anal plate, face rough Cressonia 



4. Head much higher than wide and triangular; horn rather small and soft, 



not well distinguished from the body 5 



4. Head about as wide as high, or trapezoidal 6 



5. Face smooth, sides tuberculate (Amorpha) 



5. Face as rough as sides of head, all heavily tuberculate 



Smerinthus and Paonias 



6. Seven setae on labrum, transverse ridges, — one each on meso- and meta- 



thorax Pachysphinx 



6. Six seta? on labrum, transverse ridges more numerous or wanting 7 



7. Body heavily granular, with granular obliques, middorsal line, and subdorsal 



on thorax, the latter raised into two pair of short horns Ceratomia 



7. Body smooth or nearly so in last stage, no middorsal granules S 



8. Labrum with ii decidedly higher than i Hyloicus (cupressl?) 



8. Labrum with ii on a level with i or lower 9 



9. Head triangular, smooth, as well as cervical shield; anal plates exceptionally 



rough; labrum with a deep narrow notch, with the setae i, ii and vi crowded 



around it Cocytius 



9. Head rounded on the vertex, but in Chlaenogramma with two enlarged granu- 

 lations; anal plate rarely rough; setae ii of labrum almost half as far apart 



as width of labrum, or more 10 



10. Head much higher than wide, and tapering to about half its width at the 

 vertex 11 



10. Head as wide as high; tapering decidedly toward the vertex 12 



,10. Head nearly as wide as high, rounded or squarish, or if tapering a little then 



strongly granulated 17 



11. Horn nearly twice as long as height of head Chlaenogramma 



11. Horn slender, and but little longer than height of head. Daremma (undulosa) 



12. Horn recurved at tip (Acherontia ) 



12. Horn regularly pointed 13 



13. Notch very shallow, in depth only 1-7 height of labrum .... Phlegethontius 



13. Notch of labrum at least twice as deep 14 



14. Horn very slender, head well rounded at the sides Daremma (catalpae) 



14. Horn normal or short 15 



15. Mesothorax acutely humped, sometimes surmounted with a tubercle. . . . 



Lintneria 



15. Body normal in form 16 



16. Head normally with two pair of back side-stripes Herse 



16. Head normally with one pair of dark side-stripes Sphinx 



17. Head heavily granulated, body cylindrical, with normal obliques on sides. . 18 



17. Head not granulated, or body swollen, or without oblique stripes but with a 



continuous subdorsal picked out in enlarged granulations 19 



18. Body somewhat granulated in last stage, especially on the obliques, etc. 



Atreides 

 18. Body unusually smooth Dolba 



* Exotic genera in parenthesis. 



