GENUS PIERIS 97 



In this plate I have given a good series of the species figured, 

 to show the various forms, and the distinguishing characters of 

 each; as just one figure of each kind would not give the student 

 a fair idea of the distinguishing features of the different species. 



44. Pieris Ochsenheimeri. 



No figure. 



I have never seen a specimen of this butterfly. It is said to in- 

 habit the country along the Pacific Ocean to the north of Puget 

 Sound, on the west coast of British Columbia. I have hunted but- 

 terflies along that coast, but did not get anything of this kind. 

 From the description it would seem to be a form of Rapae. The 

 description reads : 



"White, costa blackish-gray, apices blackish ; a round black 

 spot in space between last costal and first discoidal nervure. 

 Nerves with faint gray scales. Bars of the wing black. Hind 

 wings white, with one spot on outer third of costa. A very nar- 

 row sub-marginal line on all wings. Underside, same as above, 

 apices yellowish, and an indefinite spot below the third discoidal 

 nervure. Hind wings have mixed gray and yellow spots as in 

 Bryonae. The female has veins rather more heavily marked with 

 gray, also the apices and the bases." 



45. Pieris Venosa. 



Plate VI ; Figures 45, a, b, c, cc. 



Fig. 45, Male, Tenino, Wash., August 9, 1891 ; Author. 



a, Male, underside, Tacoma, Wash., May 3, 1890; 



Author. 



b, Female, Tacoma, Wash., May 6, 1890; Author. 



c, Female, underside, Tacoma, Wash., May i, 1890; 



Author, 

 cc. Female, underside, Mt. St. Helena, Cal., April, 



1894 ; Author. 

 All Pierids have a weak, gentle flight, stopping often to feed on 

 the blossoms of flowers, and so are easily taken, and Venosa is no 

 exception to the rule. The wings of Venosa are all white on the 

 upper side and have but few black scales at apices or elsewhere. 

 Beneath, all veins of the females are positively margined with 

 black scales, whence the specific name, Venosa, or veined, and all 

 wings are more or less tinted with yellow, especially the hind ones, 

 on underside. 



