( 346 ) 



xxxvi. p. 2112. n. 5 (18?,'.() ; Walk., Lhl I.ep. lux. li. .»/. viii. p. 247. n. 9 (IH.OG) (N. York; 

 Florida; Orilla, Can.); V\ic\i, li-i>l. Ins N. York iii. p. 462 (185G) ; M^n^tr., Ennm. Cirp. 

 Aiiim. Petr., Lip. p. 94. n. VM'A (1857) ; Clem., Journ. Ac. Nat. Sci. PhUad. iv. p. 185 n. 90 

 (18f)9) ; Morris, Cut. Lep. N. Am. p. 20 (1860) ; Clem., in Morris, %». Lep. N. Am. p. 213. 

 n. 7 (1862) ; Lintn., Pmc Kiil. Sue. rii'ilml. iii. p. 668 (1804) (life hist. ; on Oslrya, Jiiglaiis, 

 C<iri/u); Harr., ed. Flint, fns. I,ij. Veij. p. 328 (18C)0) ; Streck., Li-ji. Kliop. llet. p. 53. t. 7. 

 f. 12 ( (j). 13 ( ? ) (1873) ; Boisd., Spe.,: (i,hi. Up. IIH. i. p. 27. n. 14 (1875) (descr. of larva 

 and pupa) ; Pilate, Pnpilio ii. p. 66 (1882) (Dayton, ().). 



Bombyx l?)Ju<jlwi(IU, Emmous, .\,il. Hixl. N. Y. v. t. 4:'). f. 9 (1854). 



Cressoiiia juglundh, Grote & Rob., Pioc. Eiit. Soc. Phihid. v. p. 101. n. 74 (1866) (Atlantic distr.) ; 

 lid., ;.<-. p. 180 (1865) (figs, of wings) ; Saund., Canad. Ent. i. p. 48 (1869) (sound of larva); 

 Lintn., Ent. Conlr. i. p. 1112 (1872) (N. Y., n. vii.) ; Grote, Bull, linfah, So,: y. II. i. p. 24 

 (1874) ; id., I.,: ii. p. 50. 227. n. 45 (1875) { = pallenx); Thaxt., Pxyrh- i. p. 30 (1874) (Newton, 

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

 Zonl Soc. Land. ix. p. £90. n. 1 (1877) ; Pack., Im. I„j. Forest Treex p. 84 (1881) ; Reed, Kt-pt, 

 Ent Soc. Onl. xii. p. 63 (1882) ; Edw., Papili,, iii. p. 25 (1883) (N. Jersej) ; Edw. & Ell., ibid. 

 p. 127 (1883) (larva); Fern., ,S>/»n^. A'. EmjI. p. 81. n. 40 (1880); Holl., Cinad. Ent. xviii. 

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

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

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

 to Mississippi, TexHs) ; Edw., Bull. U. St. Nat. Mu.i. xxxv. p. 44 (1889) (lit. relat. to metam.) ; 

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

 May 20th) ; Beutenm., Bull. Amer. J/».s. N. II. vii. p. 317. t. 7. f. 8 (I81I7) (larva, pupa ; on 

 hickory, walnut, and Ostri/a ; N. York, two broods) ; Hanb., Canad. Ent. xxix. p 292 (1897) 

 (Manitoba) ; Rowl., Ent. News ix. p. 190 (1898) (Missouri ; walnut, hickory) ; Hanh., Canad. 

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



Cressonia pallms Strecker, Lep. Rhop. H,t. p. 54. t. 7. f. 14 ( ? ) (187.3) (Texas) ; Butl., I.e. p. 590. 

 n. 3 (1877) ; Kirby, I.e. p. 713. n. 4 (imi). 



*Cressonia rohinsonl Butler, I.e. p. 590. n. 2 (1877) (N. York ;-Mu8. Brit.) ; Kirby, I.e. n. 3 (1892). 



Cressonm hyperbola Slosson, Ent. Amer. vi. p. 59 (1890) (Florida) ; Kirby, I.e. n. 2 (1892). 



c? ? . There is only one species of Cressonia ; it varies in the tint of the groiind- 

 colonr and also in the position of tlie lines. The individual described as lajperhola 

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

 individuals occur also in other genera, for instance in Maramha. AVe have 

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

 any local difference. 



c?. Tenth tergite triangular (PI. XXII. f. 17), elongate, gently curved, with 

 almost ])arallel 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 produced 

 into a triangular, obtusely 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. 



? . Eighth 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. 



Hab. Canada to Florida and Texas, westwards to the Mississipjii basin. 



In the Tring Museum 6 larvae and 2 pupae, 23 SS, 12 ? ? from : Toronto, 

 Canada ; N. Hampsliire : N. Jersey ; Quincy, Illinois ; San Antonio, Texas ; 

 Sanford, Florida. 



