PAPILIO VII. 



hilar spots disappear almost entirely. The single female H'li^pocrafcs examined 

 lias the yellow area very much restricted on upper side, all the discal spots on 

 primaries being separated by wide black spaces, and the basal area is black to 

 middle of cell ; so is the .space between cell and lower branch of median nervure 

 to both margins, except a small ^-ellow triangle at the extremity. There is the 

 same absence of lilack in cell beneath primaries as in the male. All of both 

 sexes have the black border of primaries scarcely, if at all, dusted yellow, and 

 •all show the blue lunule meeting the fulvous anal spot with no intervening color; 

 on secondaries beneath, the black portion of the border to hind margin is very 

 much less dusted than in Machaon, in which species the black area is usually 

 hidden by the yellow scales, and tlie blue spots stand in the middle of the Ijlack, 

 on each interspace. 



Much of Felder's description will apply to Orefjoiiia as contrasted with 3Ia- 

 chaon ; but the former differs from ///}:yjoc/'o/f.S' in several particulars. In Ore- 

 ffonia the yellow discal spots of primaries are larger, the black intervening 

 spaces being narrower than in Hippocrates, and the yellow spots in the cell are 

 both much smaller ; the yellow area is broader on secondaries, and as in Macliaon 

 and ZoUcaon ; on the under side there is much more black in the cells, which is 

 about as in Ifachaon ; and the tails are .shorter, narrow, and not sub-spatulate. 

 These are between Mcichaon and Hippocrates in length and shape, and precisely 

 as in ZoUcaon. In both my $ , the length of the tail measured on posterior side 

 is .32 inch ; the three Hlppocrrites show .44, .48, and .54 inch, respectively. 

 In fact, Oregonla is nearer to ZoUcaon than to either of the others. A large 

 female of the last named species in my collection, expanding very nearly four 

 inches, which is unusual, placed side by side Avith one of the female Oregonla, 

 cannot be distinguished from it b}- the appearance of the upper side, except by 

 the round and separated black spot in the fulvous anal spot, while in Oregonla 

 the corresponding black spot is a continuation of the black stripe which edges 

 the inner margin, turned in ami thickened so as to have an oval shape rather 

 than round. On the under side I can see no difference, except that the same 

 black spot is present in ZoUcaon, and the cell of primaries is wholly black, with 

 a terminal and central yellow spot. There is a marked difference, however, 

 between the bodies in these two species, in ZoUcaon the wliole abdomen being 

 black, with only a yellow side stripe, whereas in Oregonla the body is yellow, 

 with black on dorsinn and with four narrow black stripes on sides and beneath, 

 just as in Machaon. Oregonla bears much the same relation to ZoUcaon which 

 Hippocrates Ijcars to Machaon. In the same district with Oregonla, 3fachaon 

 also flies, of the same type with the Hudson's Bay and Alaskan examples, which 

 are verv like ^'ar. Aslatlcus, Menetries. 



