( 594 ) 



oblique, dorsal edge dentate, tlie number and size of the teeth variable. ? no 



dissected. 



Early stages described by Schaus, I.e., nearest to those of P. Iroilus. 



Hah. Arizona to Gnatemala. 



In the Tring Museum 28 cJc?, 1 ?, from : Arizona ; Monterey, Mexico ; Las 

 Vigas, Mexico, June 1896 (W. Schans); Orizaba, May 1896 (W. Schaus) ; Jalapa, 

 February 1896 (VV. Schans); Oaxaca; Guerrero (0. T. Baron) ; Palin, AV. Guate- 

 mala, 2500 ft., August— September 1904 (A. Hall) ; La Antigua, W. Guatemala, 

 5000 ft., August 1904 (A. Hall). 



VII. Troilus Group. 



Closely allied to the Anchisiades Group. 



SO- of forewing in middle or at two-fifths between SC and SO' ; lower angle 

 of cell not much more obtuse than upper angle ; D- shorter than D' ; basal cellule 

 of hindwing longer than in the Ancliiaiados Group, PC more strongly curved. Two 

 widely separated rows of spots on underside of forewing; hindwing below with 

 metallic blue patches. 



Genitalia : S- Harpe with ventral tooth and apical process, resembling the 



harpe of the Anchisiades Group. ?. Vaginal armature also of the type of 



P. anchisiades. 



Larva with eye-spot on each side of thorax. 



Two species. 



Antenna and legs black Species No. 85. 



Antenna tawny, tibiae and tarsi pale yellowish green . . Species No. 86. 



85. Papilio troilus L. (1758). 



PajiiVo Efjiies Trnjamis IroUns Linne, Syst. Nat. ed. x. p. 459. n. 6 (1758). 



The close relationship between P. troilus and P. palamedes becomes at once 

 evident on comparing the pattern and structure of the two insects. The pale 

 snbbasal band on the underside of the hindwing so characteristic of P. palamedes 

 is sometimes rejireseuted in southern sjiecimens of P. troilus by a line which is 

 continued across the forewing, there being a ditfase yellow costal streak at tbe base 

 of the forewing in all specimens. The subapical cell-spot, usually double, on the 

 underside of the forewing corresponds to the bar oi P. palamedes ; it is occasionally 

 missing. While most specimens have on the disc of the forewing above and below 

 only one row of spots, which are usually small on the npperside, being often absent, 

 some females bear two rows. These rows are in some males represented anteriorly 

 by a dot in the subcostal fork and a more proximal dot before the fork. Besides 

 the orange costal spots the npperside of the hindwing bears sometimes in the female 

 a small orange spot behind SC-. One of the most interesting features in the pattern 

 of P. troilus is the disappearance of the orange spot W — M' on the underside of 

 the hindwing. Most siiecimens bear a few orange scales where the spot has been, 

 sometimes there is even a distinct bnt small orange spot, but in the majority of 

 specimens the spot is suppressed, the scales having assumed a glaucous buff tint. 



First protarsal segment longer than the other four together. 



The variability in the dentition of the scaling of the underside is of some 

 interest. The scales have in most females one tooth less than in the males, being 

 on the anterior area of the forewing tri- or (jnadridentate and in the 'posterior area 



