( 73'J ) 



F. F. Fenii. x. p. (i. u. ilf) (18G9) ; Heyl., Tijihrhr. KnI. xiii. p. Ud. u. 74. t. (1. f. 1 (1870) 



(Breda, var.) ; Voll., /T-W. p. 158(1870) (same var.) ; Gooss., .1 ««. .SV. /i«^ Frame p. 118 (1871) 



(larva var.) ; Siebke, E,i. Jm. Non: in. p. 24. n. 3 (1874) ; Megn., BiiU. Sor. But. Fmitce p. 53 



(1875) (grey var. ; Digne) ; Bell., ihul. p. 78^(1875) (grey var. ; Digne) ; Staud., Hor. Sor. But. 



Rim. xiv. p. 2'.I8 (18,8) ; Fall., Bull. S«,: But. Fntnre p. 71'. (187H) (var. ; not red) ; Kill., Jahrb. 



Nat. Ges. Grauh. xxiii. p. 45 (188(J) ; Albr., Bull. Mosnju p. 379 (1882) (Moscow) ; Eom., Mem. 



Lqi. i. p. 71 (1884) (Tiflis ; Borjoum ; v. vi.); Lampa, But. Tuhkr. vi. p. 27. n. 117 (1885) ; 



Kill, I.e. xxix. p. 8 (18811) ; Amel, Bed. But. Zeitschr. xxxi. p. 2(;i (1887) (Dessau) ; Hofm.. 



Baup. Grossxrhm. p. 29. t. 8. f. 2, t. 50. f. 18 (18i13) ; id., Grossschm. p. 30. n. 12. t. 18. f. 1 



(1894) ; Kill. & Cafl., Jnhrh. Nat. Gen. Gmub. xxxviii. App. p. 20 (1895) ; Vos, Tijihrhr. But. 



xli. p. 80 (1898) (Apeldoorn) ; Bartel, in Eiilil, Gmsssrhm. ii. p. 123 (1900). 

 Theretra porrcllus, Hiibner, Verz. hek. Schm. p. 135. n. 1448 (1822). 

 SphjiLC porcellus, Vogel, Schuietl. Cub. ii. p. 19. t. 7. f. 5. a. b (1822). 

 Choeroraiupa purcellus, Duponchel, in God., P(ij>. Franrr, Suppl. ii. p. 160 (1835) ; Westw. & 



Humpbr., Brit. Moths i. p. 23. t. 23. f. 9. 10 (1843) ; Wallengr., Skand. Met. Fjar. p. 4(5. n. 2 



(1803) ; Boisd., Sper. Gin. Lep. UH. i. p. 280. n. 78 (1875). 

 Pergr.m purrellu.i, Walker, Li.-<t Lep. Ins. B. M. viii. p. 150. n. 1 (1856) ; Butl., Traii". Zunl. Sm\ 



Lund. ix. p. 547. n. 1 (1877). 

 Chiteroriimpn jxjrrelbis, Barrett, Li^p. Brit. Is. ii. p. 55. t. 52. f. 2. 2a (1893) ; Weism., ed. Meld., 



Stud. Theor. Desr. i. p. 184. t. 4. f. 24—28 (1882) (larvae). 

 Mctopsilus purcelhis, Duncan, in Jard., Nat. Libr. xl. p. 163. t. 11. f. 2 (1843); Kirby, Cat. Lep. Hct- 



i. p. 660. n. 11 (1892) ; id., in Allen, Nat. Libr., Moths iv. p. 26. t. 98. t 2. 3 (1897) ; Staud. 



& Reb., Cut. Lep. ed. iii. p. 104. n. 761 (1901). 

 Deilephila porcrlliis var. suellus, Oudemans {iion Staudioger, 1878), Tijdsrhr. But. xlii. p. 21 (1899) 



(Holland). 



(?¥. The three insects porcdhtu, s>telli(s, and a,%hoUlcmis come so near each 

 other that we were at first inclined to treat them as geographical races of the same 

 species. Suellus connects porceUus completely with askoldensis when closely 

 compared, combining characters of the one with characters of the other. However, 

 jjorrtUus and suel/us occm together and are always different. From this we must 

 conclude that they are indei>endeut of one another, i.e. are specifically distinct. If 

 the differences between porrcllus and suiHlus are of specific value, then we have no 

 right, we think, to regard the diiferonces between suellus and askoldensis otherwise 

 than being also specific, although the similarity of sudlus with askoldensis is a 

 little more marked than between suellus and porcellus. Sexual armature scarcely 

 different in the three insects. 



Red colour of forewing occasionally absent. Marginal band of hindwiiig, above, 

 rarely blackish. 



S . Tenth tergite convex at tip, feebly hooked in lateral asjjcct, aliout half the 

 width of the sternite ; this truncate with the angles rounded. Clasjicr broad; 

 about a dozen friction-scales; process of harpe rather shorter Ihaii in vl/icnor 

 elpenor ; dentate ridge of jienis-sheath also sliorter. 



Ocelli of larva rounded ; horn vestigial. 



I'npamuch slenderer than that of elpenor, more than three limes as long as 

 hroail ; tiiljerclo in front of eye pointed ; abdominal belts of tubercles curved basud 

 in middle, the tubercles here less high and more numerous than laterally. 



Hull. Europe, eastward to Asia Minor and Transcaucasia. 



A series of larvae, pupae, and imagines in the Tring ftluseum from various 

 places. 



(iNs. Pergesa suellus. 



Ikilephilapornlhu var., i.eder, .!»». Sor. B,il. IS.t.,. \m. \>. 28 (1H69) (Hunk.) udii ; .\». m.). 

 Ilrilephihi porrrlliis var. ? melius Staiidinger, llor. Sor. Bid. Boss. xiv. p. 298 (IK78) (.\iiianH). 

 /Je.lephila /jorrelluH var. suellus, UomuuolT, Mru,. Lfp. i. p. 71. t. 4. f. 1 (1884) (Tilli8 ; liorjoum ; 

 Lttgodekhi ; I»li»9U ; Suanetie ; together with porrrllus I). 



