( 106 ) 



striiotnre and colour of tlic larva does not speak a^ainsf the insects being nnited 

 under one fjeneric term. Tiie dissimilarity is not an ex])res.si(ni of dilferent origin 

 of the forms, but of adaption of phylogenitically the same loiius in different 

 directions. As a matter of course, there is some justification in ]ileading that each 

 of tiiese species represents a genus of its own ; but we reject such a i)nicedure, as 

 it would necessitate, if conseiinently carried ont, the erection of a genus for practically 

 every species, and would lead iu the end to a mere shifting of terms, genus being 

 substituted for species, and s])ecies for geograpliical race (subspecies). 



Pnpa : tongue-case not jirojecting, not reaching to end of wing-cases, except 

 ami/ntor. 



The sexual armature confirms the relationshiji of Crratomin with Isogramma 

 and Cklaenogrammn. 



Ilnb. Eastern parts of tlie Nearctic Region. 



Three species. 



Key to the species : 



a. Postdiscal band of hindwing, below, sharply 



dentate ......... b. 



Postdiscal baud of hindwing not dentate . . bil. C. catalpac. 



b. Pale fringe-spots of forewing very much smaller 



than the brown spaces between them . . 79. C. amyntor. 



Pale friuge-spots of forewing the same size about 

 as the brown spaces between them . . . 8U. C. tnnlulosd. 



79. Ceratomia amyntor. 



Agriiix amyntor Hiibner, Stimiiil. Er. Schm. iii. t. 39 (1824?). 



Ceratomia quailricornis Harris, in SiUim., Journ. Set. Art xxxvi. p. 29.S (1839) (I. on Vlmus 

 americuiia) ; id., Ins. Inj. Veget. p. 227 (1841) {I., p.) ; Walk., Lid Lep. Ins. B.M. viii. p. 268 

 (1856) (Mass.); Clem., Juiirii. Ac. Nat. Sci. Philail. iv. p. 179. n. 82 (1869) (Mass.; Penn. ; 

 Michig. ; l.,ji.) : Morris, Cat. Lep. N. A7n. p. 20 (1860) ; Clem., in Morris, Si/ii. N. Am. Lep. 

 p. 206 (18r,2); Pack., R,pl. N. Hist. <i- Geul. Maine ii. p. 167 (18G2); Lint., iVoc. Ent. Soc. 

 Philnd. i. p. 286 (1863) (metam. ; Ulmm) ; Jaeg., Life N. A?n. Ins. p. 192 (1864) ; Lint., Proc. 

 Ent. Soc. Philad. iii. p. 664 (1864) (pupa) ; Harris, Ent. Curresp. p. 282 (1869) {l.,p.) ; Andr., 

 Canacl. Ent. viii. p. 40 (1876) (Brooklyn, brown I.) ; Bunk., ibid. viii. p. 12U (1876) 

 (Rochester, N.Y., brown I., Engl. Elms) ; French, Trans. Dipt. Agric. Win. XV. p. 107 (1877) ; 

 Fletch., Camid. Ent. xii. p. 212 (1880) (Ottawa); Mart., Trans. Drpt. Agr. Illin. xviii. App. 

 p. 102 (1880) (larva) ; Hag., Papilio iii, p. 61 (1883) {quadr. to be retained) ; Harris, ed. Flint, 

 Im. Inj. Veget. p. 323. fig 148 (1883). 



Ceratomia amyntor, Grote & Rob., Proc. Ent. Soc. Philad. v. p. 164. 190 (1865) ; Beth., Camid. Ent. 

 i. p. 71. n. 20 (18G9) (Canada) ; Minot, ihid. ii. p. 28 (1870) (egg, /.) ; Bowl., ibid., iii. p. 143 

 (1871) (Quebec, vi.) ; Lint., Ent. Cmitr. i. p. 192 (1872) (N. York, ;. : vi. n. vii., viii.; l: 

 E. viii. ix.); Thaxt., Psijche i. p. 30 (1874) (Mass., E. vi.— B. vii.) ; Grote, Ball. Buffalo Soc. 

 A'. Sci. i. p. 24(1874) ; id.. I.e. ii. p. 227. n. 46 (1875) ; Caulf., Catuid. Ent. vii. p.241. n. 11 (1875) 

 (Montreal, common, vi.) ; Boiad.. Sjiec. Gen. Lep. Hit. i. p. 53. t. I. f. 2 {I.) (1875); Butl., 

 Trans. Znnl. Soc. Land. ix. p. 621. n. 1 (1877) {Mass., Mexico!) ; Grote, I.e. iii. p. 224. n. 47 

 (1877) (Canada ; Mass. ; Penn. ; Mich.) ; Pil, Papiliu ii. p. 66 (18x2) (Dayton, O., not rare) ; 

 Good., Psi/rhe iii. p. 368 (1882) (Mass. ; Ulmus, Bstulu) ; Reed, Rept. Ent. Soe. Ont. xii. p. 64 

 (1882) (larva) ; Druce, Biol. Centr. Amer., Lep. Net. i. p. 24 (1883) (N. Am. ; "Mexico" teste 

 Mus. Brit.) ; Fera., Canad. Ent. xvi. p. 21 (1884) (Orono, Maine, rare) ; id., Sphing. N. Engl. 

 p. 24. n. 9 (1886) (metam.) ; Grote, Hawl.- Moths A'. Am. p. 38 (1886) ; Smith, Tram. Amer. 

 Ent. Sue. XV. p. 201. t. 10. f. 5. 6 (genit.) t. 11. f. 1. (leg) (1888) (Canada to Virginia, westw. to 

 Missouri, Iowa) ; Edw., Bnll. U. St. Nat. Mus. xxxv. p. 44 (1889) (lit. rel. to metam.); Pack., 

 ['. St. Dept. Agr., lipt. Ent. Comm. v. p. 242 n. 28. t, 11. f. 1 (/.) (1890) (metam.) ; Dyar, in 

 Riley, Ins. Life iii. p. 322 (1891) (N. York, electr. Ught) ; Kirby, Cat. Lep. Met. i. p. 695. n. 1 



