( 346 ) 



xxxvi. p. 2;i2. n. 5 (18.19); Walk., Lht hep. Im. B. M.Mm. p. 247. n. 9 (1856) (N. York; 



Florida ; Orilla, Can.) ; Fitch, Rfpt. Ins N. York iii. p. 4G2 (1850) ; Me'n^tr., Emim. Corp. 



Anini. Petr., Lip. p. 94. n. 1508 (1857) ; Clem., Joimi. Ac. Nat. Sd. Phihid. iv. p. 185 d. 90 



(1859) ; Morris, Cut. Lep. iV. Am. p. 20 (18G0) ; Clem., in Morris, Syii. Lep. N. Am. p. 213. 



D. 7 (1862) ; Lintn., Prtic. Eiil. Soc. FhUiul. iii. p. 068 (1804) (life hist. ; on Ostryii, Juglans, 



Carya) ; Harr., ed. Flint, Inn. Iiij. Veg. p. S'iS (1805) ; Streck., I^eji. Rhnp. IIH. p. 53. t. 7. 



f. 12 ( (J). 13 ( ? ) (1873) ; Boisd., Spcr. Ghi. Lip. Hit. i. p. 27. n. 14 (1875) (descr. of larva 



and pupa) ; Pilate, PapUh ii. p. 06 (1882) (Dayton, 0.). 

 Bomhyj- (r)jiiyl(i,irlis. Emmons, Nat. Hist. N. Y. v. t. 45. f. 9 (1854). 

 Ciessonia jiig)<ni(lh, Grote & Rob., Pme. Eiil. Soc. Fhihul. v. p. 101. n. 74 (1865) (Atlantic distr.) ; 



iid., l.c. p. 180 (1865) (figs, of wings) ; Saund., Caruul. Ent. i. p. 48 (1869) (sound of larva); 



Lintn., Ent. Contr. i. p. 192 (1872) (N. Y., ii. vii.); Grote, Bull. Bnffalo Sue. X //. i. p. 24 



(1874) ; id., /.<■. ii. p. 50. 227. n. 45 (1875) { = pal/ens); Thaxt,, P^^yrhe i. p. 30 (1874) (Newton, 



Mass., E. vii.) : Grote, I.e. iii. p. 223. n. 46 (1877) (Canada to Southern States) ; Butl., Trans. 



Zonl. Soc. Land. ix. p. £90. n. 1 (1877) ; Pack., Ins. hij. Forest Trees p. 84 (1881) ; Reed, Rei>t. 



Ent Soc. Onl. xii. p. 03 (1882) ; Edw., Popilin iii. p. 25 (1883) (N. Jersey) ; Edw. & Ell., ibid. 



p. 127 (1883) (larva); Fern.. Spliing. X. Engl. p. 81. n. 40 (1886); HoU., Cnnad. Ent. xviii. 



p. 105 (1880) (W. Pa. and S. Ind., larva common) ; Grote, Hawk Moths N. Am. p. 36 (1886) ; 



Smith, Ent. Amer. iii. p. 2 (1887) (struct, of ant.); id., Trans. Amer. Ent. Soc. xv. p. 230. 



t. 12. f. 1 (genit.). 2 (ant.). 3 (genit.), t. 13. f. 1 (venat.) (1888) (Canada to Georgia ; westward 



to Mississippi, Texiis) ; Edw., Bnll. U. St. Nat. .Vus. xxxv. p. 44 (1889) (lit. relat. to metam.) ; 



Kirby, Cat. Lcp. Net. i. p. 713. n. 1 (1892) ; Brehm, Ent. News viii. p. 21 (1897) (eggs 



May 20th) ; Beutenm., Ball. Amer. Mns. N. II. vii. p. 317. t. 7. f. 8 (1897) (larva, pupa : on 



hickory, walnut, and Ostrga ; N. York, two broods) ; Hanh., Canad. Ent. xxix. p 292 (1897) 



(Manitoba) ; Row]., Ent. A'ews ix. p. 190 (1898) (Missouri ; walnut, hickory) ; Hanh., Cnnad. 



Ent. xxxi. p. 52 (1899) (Manitoba) ; Heath, ihid. xxxiii. p. 99 (1901) (Manitoba). 

 Cressmiia pallrns Strecker, Lep. liliop. H,t. p. 54. t. 7. f. 14 (?) (1873) (Texas) ; Butl, l.c. p. 590. 



n. 3 (1877) ; Kirby, l.c. p. 713. n. 4 (,1892). 

 *Cressonia rohiusoni Butler, l.c. p. 590. n. 2 (1877) (N. York ;-Mu8. Brit.) ; Kirby, l.c. n. 3 (1892). 

 Cressonia hyperbola Slosson, Ent. Amer. vi. p. 59 (1890) (Florida) ; Kirby, l.c. n. 2 (1892). 



(J ? . There is only one species of Cres.wniu ; it varies in the tint of the ^ronnd- 

 colonr and also in the ]iosition of the lines. The iudividnal described as Injperhola 

 has the last antemedian and the first discal line fused behind ; such aberrant 

 individuals occur also in other genera, for instance in Manimba. We have 

 examined sjteciraens from various states of the South and North, and failed to find 

 any local difference. 



cj. Tenth tergite triangular (PL XXII. f. 17j, elongate, gently curved, with 

 almost parallel sides in apical half, convex above, concave below at end, apex 

 rounded ; sternite also triangular, pointed, slightly curved upwards at apex. 

 Clasper sole-shaped, dorsal edge rather obviously concave basally ; harpe jiroduced 

 into a triangular, obtnsely pointed, distal process, which projects very little and 

 has the dorsal edge denticulate (in Prof. Smith's description the harpe is erroneously 

 said to project from the superior edge of the clasper). Penis sheath compressed, 

 with an apical patch of minute tubercles or teeth which point distad. 



?. Eiglith abdominal tergite sinuate, membranaceous mesially, more strongly 

 chitinised laterally. Vaginal plate with a ridge before the orifice ; the ridge cleft, 

 the two halves strongly rounded ; postvaginal part of plate membranaceous distally, 

 rounded. 



Early stages see above. 



Hah. Canada to Florida and Texas, westwards to the Mississippi basin. 



In the Tring Museum (J larvae and 2 pupae, 23 tjc?, 12 ¥ S from : Toronto, 

 Canada ; N. Hami)shir(! : N. Jersey ; Quincy, Illinois ; San Antonio, Texas ; 

 Sanford, Florida. 



