1865.] 217 



2. Colias Scudderii, now sp. 



Male. — -Upper surface, lemon-yellow; strongly powdered with green- 

 ish black atoms at the base of both wings, and along the inner margin 

 of the secondaries. 



Primaries have a broad black marginal band, slightly curved before 

 the apex, and terminating obtusely upon the costal margin ; on the 

 inner margin, much as in Philodice and Alexandra, except that the 

 small angular projection is rather less protuberant ; this band is crossed 

 to the margin by fine yellow nervules, and its outline is more or less 

 irregular interiorly, though always nearly parallel with outer margin ; a 

 short narrow black arc at extremity of the cell; costa reddish at base. 



Secondaries have a narrow black margin, having a short obtuse pro- 

 jection just below the apex; it is crossed by yellow veins, and very 

 slightly scalloped within, terminating acutely before the anal angle. 

 There are two paler spots, opaque, of the same color at the extremity 

 of the cell, of which the outer is much the least; expanse 2.05 inches. 



Under surface; primaries colored as above, costa marked with black 

 atoms; discal spot, dilated, sagittiform, — apex pointing outwardly. — 

 and contains a silvery white pupil. 



Secondaries, greenish-yellow, thickly covered with black scales; a 

 marginal space, somewhat deprived of these, has the appearance of a 

 lighter colored marginal band ; two silvery-white geminate, diseoidal- 

 spots, of which the outer is the least, bordered by a narrow, common, 

 ferruginous line, which is prolonged outwardly into a short reddish- 

 brown dash ; a short ferruginous line at the base, and a small spot of 

 the same color upon the costa. 



Fringe upon the upper side, pale yellowish-red ; below, distinctly 

 roseate. Thorax and abdomen, greenish-black, covered with long hairs; 

 a reddish brown collar on the pro-thorax; palpi, greenish yellow ; un- 

 derneath, greenish-yellow; tibiae and tarsi, roseate. Antenna; roseate, 

 club, ferrugin us above. 



Female. — Upper surface, sulphur-yellow; costa of primaries and 

 base of both wings strongly powdered with black atoms; discal spot, 

 black upon the primaries, larger than in the male; orange-yellow upon 

 the secondaries. Expanse, 2.U7 inches. 



Under surface, primaries as in the male, but more sprinkled with 

 black atoms, particularly on the costa, and near the apex. 



Secondaries, have the light marginal bands more distinct, and but 

 one discal spot, silvery, sub-quadrate, surrounded by a ferruginous line; 

 a basal streak and costa roseate. Fringes of both wings, above and 

 below, roseate. 



