1882.] 139 [Hagen. 



stripes have darker blackish dots, three on each segment. The 

 proof that there was an overcrowded hurried brood is shown by 

 the fact that some seems not to have shed the skin of the cater- 

 pillars of the abdomen or only partially. The chrysalis belongs 

 more to the Terias type. 



There were found among parasites a large ichneumon, probably 

 a Pimp la, and some larvae of a Tachina. But parasites were 

 scarce. 



A species of Simulium swarmed eagerly and incessantly around 

 some trees, which had the furrows of the bark filled with thou- 

 sands of chrysalids. The flies were so eager that by taking a 

 bunch of chrysalids some could be almost caught by hand. 

 Many of the chrysalids were dead. I believe that the chrys- 

 alids are sucked by the fly, as I saw them near the suspensory 

 silk bands. The fact is not yet mentioned that Simulium will 

 live upon insect blood, but by no means improbable. Certainly 

 it would explain how the myriads of Simulium can live in places 

 where red-blooded animals are comparatively scarce, even if pre- 

 sent shunning as much as possible such places. May not the 

 same manner of life apply to Culex ? 1 



Pieris Beckeri. 



Near the Columbia River at Umatilla, Or., and on the opposite 

 side in Washington Terr., June 24 to 26, were collected 26 speci- 

 mens $ , $ ; one very old female, July 20, at Ainsworth, W. T., 

 higher up near the same river. The species is very wild in 

 flight. 



Concerning the supposed identity with P. Chloridice (Strecker, 

 H; Edwards) I have compared all figures and descriptions, as I 

 have no Russian specimens. 2 Fischer, Entom. n, Lepid. pi. 8, f. 2, 

 a, c, gives the female on both sides and f. 6 the male underside, 

 from Yolga and Ural. — Esper. I, p. 177, pi. 90, f. 1, gives the 

 male from Siberia; I consider it to be a female. Herbst. Lepid. 

 pi. 93, f. 4, 5, gives both sides of the female. Huebner pi. 141, 

 f. 712 to 715 figures male and female, both sides ; but there is 

 no description in the copy seen by me. Boisduval, Icon, hist., 

 pi. 6, f. 5, 6, p. 31, the female from Moscow. 



1 See: The Entom. Monthl. Mag., Vol. xix, p. 254. 

 2 1 have since compared five. 



