( 628 ) 



b. P. backus chrysomelus subsp. nov. 



rupUio harlnis, Staudinger, Exot. Tagf. p. 15 (1S84) (Peru) ; Weeks, Ilhislr. Diurii. Lep. p. 20 

 (1905) (Chulumani, Bolivia). 



? . Basi-iliscal area of forewing orarifre above and below, more or less creamy 

 yellow at costal margin ; discal streaks R- — M- distally less acuminate on underside 

 than in the preceding subspecies. 



The individual variability is considerable. Some specimens have hardly any 

 cream-colour on the upperside, while in others the costal half of the subapical 

 cell-patch, the patches outside the short cross-veins and the distal portion of the 

 streak R^ — R^ are creamy. The amount of tawny orange on the hindwing is 

 very variable. 



Hab. Pern ; Bolivia. 



In the Tring Museum 24 cjc? from: Poznzo, Hn^nnco, 8U0— lUOO m. 

 (W. HoflFmanns) ; Chanchamayo (Schunke ; Hoffmanns) ; Montanas, R. Madre 

 de Dios, September 1901 (Oekenden) ; R. Slucuri, S.E. Pern, June 1901, 2500 ft., 

 dry season (Oekenden) ; La Union, R. Huacamayo, S.E. Pern, 2000 ft., November 

 1904, wet season (Oekenden) ; R. Songo to R. Suapi, Bolivia, 1100 m., March — June 

 (Garlepp) ; Salinas, R. Beni, June 1895 (Stuart); Mushay, R. Beni, August 1895 

 (Stuart) ; S. Augnstin, R. Mapiri, 3500 ft., September 1895 (Staart) ; Charuplaya, 

 May 1901, 1300 m., some rain (Simons). 



XI. Scamander Group. 



Dentition of costal margin of forewing vestigial. 



Of all the species of Subsection D a member of the presnt group, namely 

 P. hellanichus, appears to us to stand in pattern nearest the ancestral form. 

 The mimetic Zagreus Group is probably an ofiPshoot from some such insect as 

 P. hellanichus. 



The dentition of the costal edge of the forewing is very feebly developed, but 

 on denuding the margin small teeth become visible, being especially distinct 

 towards the base of the wing. 

 Key to the species : 



a. A yellow band of spots across the upperside of both wings b. 

 No yellow band on upperside ...... r. 



b. Hindwing, upperside, with large yellow spot in cell, discal 



spots more or less orange distally .... Sjiecies No. 108. 

 Band of hindwing, ujiperside, not entering cell, or cell-spot 



very small Species No. 109. 



c. Abdomen with large creamy side-band or patch . . Species No. 111. 

 Abdomen black Species No. 110. 



108. Papilio hellanichus Hew. (1868). 



Papilio hellanichus Hewitson, Exol. Butt. iv. Paj). t. 9. fig. 27. 28 (1868) (Uruguay) ; Kirby, Col. 

 Dlurn. Lep. p. 5C6. n. 323 (1871) (Uruguay) ; Oberth., El. d'Eiit. iv. p. tj'.l. n. I'JG (1W80) 

 (Brazil); Haase, Untcmuch. Mimicry i. p. 92 (18y3) (belongs to the •' Machaon Group"); 

 Eimcr, Artb. Vcrxi-dmllseh. Schmett. ii. p. 138. t. 7. fig. 5. (J (1896) (near /'. aii,ericu.'<) ; id., 

 Orthogen. p. 37 (1897) ; Christ, Milt. Schweiz. Ent. G«.i. ix. p. 272 (1897). 



Papilio hellauicus (!) Hewitson, l.r. Itulex (1871). 



Papilio cleotas, Burmeister (n™ Gray, 1832, err. det.), Dc^ci: Rep. Ardent, v. p. 61. n. 3 (1878) 

 (mouth of R. Paranii ; Entre Rios ; Rrsario ; Gualeguaychu ; Cordova ; Las Couclias ; 

 P. hellanirux ! sub sjn.). 



