PAPILIO X. 



Under side blacki.sh brown ; the si^ots repeated, the sub-marginal enlarged, 

 especially on primaries ; tlie sub-apical area on costa of jirimaries largely dusted 

 with yellow ; the middle of the black space between the band and the outer 

 spots is also dusted, so as to form a band or stripe of scales ; secondaries have 

 the outer ends of the discal spots more or less suffused with yellow-fulvous, usu- 

 ally only the two or three spots next the end of cell, Ijut sometimes all are so 

 colored ; the black extra-discal space is nearly occupied by clusters of yellow 

 scales, on the anterior edges of which are clusters of blue scales. 



Body black ; on either side of the thorax a deep ochre-yellow stripe to the 

 insertion of the wings ; on the abdomen a sub-dorsal row of small yellow spots 

 on either side, and another row which is lateral; there is also a lower lateral row 

 from middle of the abdomen to last segment, and a vertical row of about the 

 same length ; legs black, the outer side of the tilure and tarsi buff ; palpi yel- 

 low and black ; frontal hairs black, at the sides yellow ; on either side, between 

 the ej'cs and back of the antennse, is a yellow spot ; antennte and' club black. 



Female. — Expands 4 inches. 



Upper side black ; the discal band represented by imperfect spots on both 

 wings, corresponding to the outer portion of the spots of the male ; there may 

 be three or four of these on primaries, on the anterior part of the wing, or none 

 at all ; on secondaries, either a few small clusters of yellow scales, or nothing, 

 except on costal margin, where there seems always to be a large and usually a 

 distinct spot ; all the yellow paler than in the males, rather buff" ; the clusters of 

 blue scales sometimes large and conspicuous, sometimes obsolescent. 



On the under si<le the spots are generally more distinct, and on secondaries, in 

 all individuals examined, form a complete series across the wing, but of single 

 width, the spot in cell being obsolete in all cases ; the spots are more suft'used 

 than in the male, either with dull fulvous or ochraceous, and the spots of sub- 

 marginal row are often more or less fulvous ; in some cases the extremity of the 

 abdomen is yellow, and the central side largely so. 



This species inhabits Arizona, and probably Southern Colorado and Utah. The 

 example described by me in 1866 was a male, which I found in a badly damaged 

 state at the Smithsonian, and it was several years before other examples were 

 received, taken in Arizona by the Wheeler Expedition. These were in bad 

 condition and of little use for descriptions or figuring. Fortunately, Mr. B. 

 Neumoegcn received, in 1878, several fresh examples of both sexes, and has 

 kindly allowed me to use them. The males dift'er much in the discal band, some 

 having this of twice the breadth of others. In some the spots of this band are 

 close together, in others there are wide black spaces between them ; all have 



