( 728 ) 



In the Tring Museum 20 c? t? from : (!arillo, Costa Rica, 3000 ft., October 

 1904 (A. Hall); Chiri.ini; R. Dagna, West Colomliia (Rosenl)erg) ; "Bogota"; 

 Pambelar and Paramba, West Ecuador ; Cachabi, W. Ecuador, low country, 

 January 1897 (Rosenberg). 



158. Papilio thyastes Drury (1782). 



Papilio Eques Achiims thyantes Drury, IHiistr. ExnI. Ins. iii. p. 47. t. 35. aud In<!i:r (1782) (Rio de 



Janeiro) ; Fabr., Eiil. Si/sf. iii. 1. p. 2C.. n. 77 (1793). 

 Iphiclhks diajjhorus Hiibner, Samml. ExnI. S'-lun. ii. t. 93 (1820?). 

 Papilio thi/astc.'<, Godart, Em: Meth. ix. p. 54. n. 83 (1819) (Brazil). 



c?. Similar to P. calliste ; ground-colour of npperside varying from maize- to 

 chrome-yellow ; one red anal spot on hiudwing, a spot M' — M- occasionally 

 vestigial ; yellow submarginal spot R^ — M' much smaller than spot M' — M-. 

 Red bars R^ — M- of underside of hindwing broken up into dots. Hairs on frons 

 short. Yellow dorso-lateral line of abdomen broader than the blaclv lateral line. 



Scent-organ : wool buffish, scales beneath it denticulate, mostly broad, those in 

 front of fold mostly entire, acuminate. 



Gen ita lia : . No ventral ijrocess on clasper ; central ridge of harpe almost 

 square, its ventral angle not produced basad, the tooth at this angle large, conical ; 

 no row of teeth across the lateral surface. 



? and early stages not known. 



Hab. Ecuador to Bolivia ; Brazil. 



Three subspecies. 



The most striking feature in the pattern of P. thi/aMes and P. calliste appears 

 to us to be the development in different directions of the yellowish ad- and sub- 

 marginal spots R' — M= in the hindwings of the two species. In P. calliste there 

 are on the upperside of the hindwing no ad- and submarginal spots M' — M' or only 

 traces of them, while P. thyastes has a large submarginal spot M' — M^. On the 

 other hand, in cellnle R' — M' there is in P. calliste a large submarginal spot and 

 a shar])ly defined admarginal curved bar, P. thyastes bearing in this cellule only 

 a reduced submarginal spot. A similar contrast is observed on the underside of the 

 two insects. We find in P. tliyastes between the discal area of the forewing and 

 the so-called submarginal line a yellowish line which represents the true submarginal 

 interspaces ; on the hindwing there is a corres2)onding row of spots between and 

 R-. These markings are entirely lost in P. calliste, while in this species the 

 admarginal spots R- — M^, which are vestigial in P. thyastes, are large. 



a. P. thyastes thijastini(S Oberth. (1880). 



Papilio thyastiiiiis Oberthilr, Et. d'Eiit. iv. p. 75. n. 235. t. 2. fig. 3 (1880) (Ecuador) ; Hahnel, Iri.i 

 iii. p. 282 (1890) (Pebas) ; Michael, ibid. v. p. 214 (1894) (Sao Paulo de Olivenga). 



Papilio tlnjasles, Staudinger, Exol. Ta(jf. i. p. 18. t. 12 (1884) (Pebas, tln/tistiiiiis = ihi/itstes) ; Haenscb, 

 Serl. Ent. Zeitsclir. xlvii. p. 154 (1903) (Arcbidona, 640 m.). 



(?. Submarginal spot R2 — R^ of forewing separate from the discal spot; discal 

 band usually broadly interrupted at R^ ; first submarginal spot absent from n])i)erside 

 or ill-defined. Ape.x of cell of hindwing black. 



In some of our Peruvian specimens the snliapical cell-bar of the forewing 

 above, and the discal costal bar arc interrupted. The position of the central red 

 spots on the underside of the liindwing is variable ; many specimens have an 

 additional red spot situated in the cell. One Peru specimen has the spots buffish 

 pink instead of liright red. 



