174 BULLETIN 15 7, U. S. NATIONAL MUSEUM 



wings with four black bands extending downward from 

 the costal margin, only the innermost reaching the lower 

 margin ; hind wings with a long narrow black stripe 

 and the inner margin narrowly black (pi. 33, figs. 1, 2). 



g'laucus (p. 179). 

 &. Upper surface of the wings chiefly brown ; fore wings with a 

 broad band of yellow from the apex to the inner third of 

 the lower border, and a curved row of submarginal 

 spots ; hind wings with a row of large yellow spots in the 

 outer third, and a broad transverse yellow band across 

 the basal portion ; a large yellow spot on the tail (pL 31, 



fig. 1; pi. 32, fig. 1) cresphontes (p. 178). 



6^ Undersurface of the wings chiefly black or blackish brown. 

 &. Undersurface of the wings with a single submarginal row 

 of orange or yellow or orange and yellow spots. 

 d\ Outer half of hind wings below metallic steel blue, this 

 portion carrying a curved row of large rounded 

 orange spots set in black, each with a small silver 

 patch on the upper side ; wings above brown or black- 

 ish brown, becoming metallic steel blue on the hind 

 wings, with a submarginal row of small light spots 



(pi. 30, figs. 1, 2) philenor (p. 174). 



<P. Outer third of hind wings below darker than the proximal 

 two-thirds from which it is marked off by a narrow 

 black line bordered outwardly by a narrow interrupted 

 metallic blue line; submarginal spots consisting of 

 stout orange and yellow crescents near the margin; 

 hind wings above with scattered blue scales which be- 

 come much more dense beyond a conspicuous narrow 

 black line along the outer third ; a conspicuous orange 



spot at the outer angle (pi. 40, fig. 1) g'laucus (p. 179). 



c*. Undersurface of the wings with two rows of conspicuous 



orange or yellow or orange and yellow spots parallel to 



the margin. 



d*. Submarginal spots above clear yellow, on the hind wings 



sometimes tinged with orange ; orange spot at the anal 



angle with a black center ; inner row of spots below 



appearing on the upper surface as bright yellow spots, 



very large (male) or small and more or less obsolete 



(female) (pi. 41, figs. 1, 2) polyxenes (p. 191). 



d^ Submarginal spots above greenish, darkest on the hind 

 wings ; no black in the orange spot at the anal angle ; 

 a large orange spot on the anterior border of the hind 

 wings ; inner row of spots below not appearing on the 

 upper surface (pi. 45, figs. 1, 2) troilus (p. 189). 



PAPILIO PHILENOR PHILENOR Linnaeus 



Bltje Swaillowtail 



Plate 30, Figures 1, 2 



Occurrence. — Common, but irregularly distributed, being abundant 

 in certain places and in others scarce. I have found it most numerous 

 in the meadows west of Cabin John, Md. 



