188 



Californian species. Amoug the large number of species from the Pacific coast, 

 which I have examined, I have never seen anything approaching near enough to 

 either of these to warrant the positive assertion that it waa the species referred to 

 by them. P. vtnosa is the most nearly allied, for which I cannot but think they 

 have mistaken it, sad as the blunder may be. P. callidice, leucodice, and auto^ice are 

 represented by P. protodice, belonging to an entirely diflerent section of the genus 

 from P. venosa.] 



PlERIS MARGINALIS (n. sp.) 



This species is most closely allied to the preceding, P. venosa. The 

 ground color is. as in venosa, but almost devoid of markings ; base of 

 all the wings black ; costal border of primaries with a narrow black 

 band, extending about half its length ; a few grayish scales at the 

 tip of wings ; outer edge of primaries, and posterior edge of secon- 

 daries with a very fine black line, slightly swollen at the tips of the 

 nervures ; fringe white ; beneath as in P. venosa, with the secondaries 

 and apex of primaries more yellowish ; males and females alike in 

 their markings. 



Body black, with some white hairs above, and a considerable num- 

 ber of yellowish white ones beneath ; antennae as in P. venosa. The 

 wings expand two inches. 



I have seen only two specimens (1 $ , 1 Q ) which are in the 

 Museum of Comparative Zoology. The male came from the Gulf of 

 Georgia, and the female from Crescent City, California. They were 

 obtained by Mr. Agassiz. 



PlERIS PALLIDA (n. Sp.) 



Above, very pale-yellowish, nearly white ; base of both wings and 

 basal half of costal border of primaries dotted with grayish scales ; 

 whole costal edge of primaries black ; the male has, in addition, a band 

 of grayish scales on the posterior border of primaries as in the male 

 of P. venosa, turned abruptly towards, and sometimes interrupted at 

 the angle, extending to the third inferior nervule ; and in the middle 

 of the space between the first and second inferior nervules, as in both 

 sexes of P. venosa, a cluster of grayish scales. • 



Beneath, secondaries and apex of primaries yellowish, with some- 

 times a few indistinct grayish scales scattered along the nervures, 

 otherwise quite immaculate. 



Body, above black, with scattered yellowish hairs ; beneath yellow ; 

 antennae as in P. venosa. The wings expand two inches. 



This species was obtained by INIr. Alex. Agassiz, at the Gulf of 

 Georgia. I have had before me five specimens (3 (5 , 2 g), which 

 are in the Museum of Comparative Zoology. 



PlERIS Tau (n. sp.) 

 Above, pure white ; costal border of primaries with a broad black 

 band, suddenly bending downwards and outwards, and following the 



