commenced, so that but imperfect notes can be given, but as the 

 collection of the Cambridge Museum, contains a large number 

 of species, determined by the best authorities, the notes based 

 upon a careful comparison of the Washington Territory species 

 with those in the collection may be acceptable. 



The specimens were collected from June 24 to July 27, from 

 Umatilla to Spokane Falls. Some were taken near the Falls and 

 at Umatilla, on the Oregon side of the Columbia River, where 

 Mr. Morrison collected for a few days. After July 27 some were 

 collected in Western Montana. In Washington Territory we 

 crossed the desert opposite Umatilla, and followed the Yakima 

 River and the valleys on the right side to the fork in the Cascade 

 Mountains, returning via Ehensburgh, and through the desert 

 to Ainsworth and Spokane. 



Papilionid^. 



P. ZOLICAON AND P. OrEGOXIUS, 



The large number of specimens of both sexes (74) approves 

 the statement that both species cannot be separated. Half of 

 them were collected June 24, 25, at Umatilla, on the Oregon side 

 of the Columbia River; the other half in Washington Territory, 

 just opposite Umatilla, June 26. One old and torn specimen 

 July 18, at Lone Tree Camp, near the Yakima River. Some 

 collected at Spokane are in the collection of Mr. Ricksecker. The 

 main part of the specimens belongs to Pap. oregonius. The typ- 

 ical P. Zolicaon is only represented by half a dozen specimens 

 flying promiscuously with the others. 



The true P. Zo/icaon is to he recognized — I — by the black spot 

 in the anal rufous spot entirely isolated above and below; II — by 

 the cell of the primaries on the under side wholly black , III — by 

 the abdomen being black, with only a yellow side stripe ; IV — by 

 smaller size (of W. H. Edwards). Concerning the black isolated 

 spot (I.) I find among the Californian specimens in the collection 

 one female with a continuation of the spot on the under side to 

 the black stripe which edges the inner margin. Mr. W, H. Ed- 

 wards has figured pi. 6 f. 4 exactly the same for the female of P. 

 Zolicaon, without mentioning it in the description. The speci- 

 mens from Washington Territory have the spot either isolated or 

 connected below. Some specimens of the true P. oregonius pos- 

 sess isolated black spots, sometimes only in one wing. There are 

 before me all intermediate forms of a spot entirely isolated, or 

 partly or wholly connected with the black stripe of the edge. 

 Concerning the cell of the primaries (II.) some P. oregonius with a 

 connected spot and a yellow abdomen have the cell partly or even 

 entirely black as P. Zolicaon ; on the contrary, some P. Zolicaon 

 (with a largely black abdomen) have the cell yellow as P. ore- 

 gonius. The color of the abdomen (HI.) is, indeed, largely black 

 in P. Zolicaon ; but sometimes true P. oregoniiis (with the spot 



