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that the name ajax "Linnt^" caiuidt jiossilily be eiujjloyi'il for the Asimina 

 Swallowtail. lu our opinion the descriiition nndcr the heading (ijnx was meant for 

 the Swallowtail now called poI>/xi'nes or asfcn'^s. Bnt as the descrii)tion is quite 

 insufficient for precise recognition, and as, further, by the reference to Ray yellow 

 specimens oi Fapilio f/lauciis are inclnded in the " species ajax Linne?," we deem it 

 correct to treat the name ajax as a synonym of glaucus* which name is described 

 before ajax, and to quote it again as a doubtful synonym under poh/xenes. A 

 change in the names of the North American Swallowtails is thus rendered 

 unnecessary, except that the name ajax is dropped altogether, the name marcellus, 

 which comes nest in priority, and with which everybody is familiar, being employed 

 instead for the species. The wings of profesilaiis being described by Liuue as white, 

 we restrict this name to the white insect figured by Merian and Glerck. 



(? ? . Antenna tawny, carinate beneath (except club), the two patches of 

 sensory hairs of each segment being impressed; scaling of upperside usually 

 fallen oflF, scales of distal segments brown or black, of proximal segments white. 

 Tibiae and tarsi pale green, the former bearing scales in fresh specimens (the 

 scaling may be present also on the tarsi when the specimen emerges from 

 the chrysalis, but we have no information on this point) ; mid- and hindtibial 

 spurs longer than the tibia is broad. 



Forewing with eight pale bands, the third very narrow, not extending beyond 

 cell, fourth and fifth continnous with the discal band, sixth distally of apex of cell, 

 reaching down to R-, seventh represented by a spot situated before SC-* ^ eighth 

 submarginal, more or less separated into sjiots, of which the posterior ones are 

 Inniform. 



Red line of underside of hindwing bordered with white proximally, distally 

 of the red line and pro.ximally of white one a black band, the distal black band 

 being the thinner one, the white line situated just outside cell, being contiguous 

 with the cross-veins D-. Scales of upper surface nearly all dentate. 



Neuratiou : Praecostal spur of hindwing at three-fourths of basal cellule. 



Scent-organ resembling that of F. protesilaiis, being very diti'erent from that of 

 P. philokms; vein SM^ covered with white scales of the ordinary shape but obliquely 

 truncate at apex, being either more or less dentate or entire ; between this vein 

 and abdominal edge of fold a dense covering of thin, white, long hairs, intermixed 

 with a small proportion of much longer and thicker ones ; these latter slightly but 

 distinctly widening towards apex, which is rather abruptly narrowed to a point. 



Genitalia : S. Tenth tergite narrow, slightly-widened distally, divided into 

 three lobes. Dorso-vcntral ridge of harpe not extending ventrad beyond the central 

 process, being almost continuous with the non-dentate dorsal edge of the apical 

 lobe of the harpe ; central process long, curved ventrad ; ventral process triangular. 



? . Walls of vaginal cavity very strongly wrinkled, the wall elevate in front of 



the vaginal aperture, but there is no sharidy separate process or ridge. 



Early stages well known. Except in first stage, the segments of the caterpillar 

 bear each six black or brown transverse lines, besides a short line in front and 

 another behind which are connected with one amther; the intersj)aces between 

 lines 2 and 3 and between 4 and 5 very narrow, these lines being usually more 



or less merged together. Frontal jiromiuences of chrysalis divergent, carinate 



above, fruns broadly concave between them in dorsal asjject. Thoracic prominence 

 vertical, slightly concave behind, lateral carina coutinueil to cremaster without 



* See page'4H. 



