352 S. II. SCUDDER ON THE SPECIES OF 



This butterflj, wliicli is most nearly allied to the preceding, and is rather smaller than 

 P. comma, differs from all the species of this genus in that the discal dash upon the upper 

 sui'face of the fore wings in the male appears nearly twice as broad as usual, from the pres- 

 ence of a patch of dark brown scales along its inferior surface ; the upper surface of the 

 fore wing of the female also differs from that of any other species in having a quadrate 

 transparent spot in the lower median interspace just below the last divarication of that 

 uervure, and a partially transparent triangular patch at the extreme base of the upper 

 median interspace ; these are not given with sufficient distinctness in the plate ; besides 

 the three little yellowish subapical patches lying one beneath the other next the costal 

 mai'gin, as mentioned by Boisduval, there are two similar but squarer patches in the inter- 

 spaces beyond the cell and nearer the outer margin. The upper surface of the hind wing 

 of the male does not differ from its usual appearance in P. Ilanhoba ; that of the female 

 is mostly dusky, with a tawmy patch near the base, and in the middle of the outer half of 

 the wing a broad, tawny, transverse patch, double the breadth of the belt of the under 

 surflice. Beneath, a silvery white ( c? ) or pale ( 9 ) slender belt of small quadrate spots, 

 similar to that of P. comma, bent at a little less than a right angle, the portion at right 

 angle to the inner border straight and continuous, the other portion sometimes broken, 

 sometimes continuous and straight. Upper organ strongly arched, deeply sulcate above 

 posteriorly; hook about one-third the length of the centrum (but in the only male speci- 

 men at hand, broken ; doubtless of the Comma type) ; lateral arms cylindrical, very slightly 

 tapering, not very widely separated at their base, beyond straight. Clasps about twice 

 as long as broad, not extending so far backward as the upper organ, narrowmg pretty reg- 

 ulai-ly ; the posterior border well rounded, scarcely extending bej'ond the apical tooth, 

 which is pretty large, erect, triangular, pointed and separated, not widely, by a moderately 

 deep, rounded excision, from the preapical tooth ; this is but a slight, triangular, com- 

 pressed denticle, removed from the upper edge of the clasp, the height of which it attains, 

 by a slight excision ; the lamina supporting the inner anterior edge of the apical tooth is 

 distinctly and sharply serrated, terminating some distance in advance of the preapical tooth 

 by a serration twice as large as the others, and much larger than the preapical tooth itself. 



The species has only been taken, and rarely, in California. 



EXPLANATIOX OF PlATES. 



PLATE X. 



The illustrations arc cliromolitliographs drawn directly from specimens ; nine stones having been used by 

 Messrs. Sinehiir and Son of Philadclpliia, to wliom my tlianlcs are due for tlie care tliey liave talien in the pro- 

 duction ot the plate. 



I, , from Colorado. Collected June 12, by T. L. Mead. 

 $ , from Oregon. Received from W. H. Edwards. 

 ? , from Colorado. Collected June 17, by T. L. Mead. 

 a , " " " June 23, " " 



(f , from New England. Collected by S. H. Scudder. 

 $ , from Kansas. Received from W. II. Edwards. 

 § , from New England. Collected by S. li. Scudder. 



