348 S. H. SCUDDER ON THE SPECIES OF 



that they are usually a little larger and more obviously continuous, often sending out on 

 the exterior border little shoots of white along the nervures. Winnipeg specimens of 

 P. Manitoba seem to approach this species closely in the markings of the wings. Upper 

 organ bent at a right angle in tlie middle and scarcely rounded, deeply sulcated poste- 

 riorly above, along the middle ; hook almost three-fourths the length of the centrum, 

 straight, moderately stout at the Ijase, as seen from above, where it tapers rapidl}', after- 

 wards slender and gently tapering ; lateral arms slender, gently tapering, nearly straight, 

 but little separated at the base from the hook, upturned at the tip to meet the hook, which 

 they slightly exceed in length. Clasps rather small, twice as long as broad, not extendmg 

 nearly so far back as the upper organ, narrowing pretty regularly from the base, the upper 

 margin incurved and sliglitly deflexed, the posterior border rounded and protuberant ; the 

 preapical tooth is longer than the apical, very slender and curved, like the apical, a little 

 forward ; they are separated from each other by a deep, rather wide, rounded excision ; the 

 apical tooth is supported by a serratulate lamina, which is the continuation of its inner 

 anterior edge, and which terminates by a conspicuous serratulate denticle opposite the pos- 

 terior edge of the preapical tooth. 



It has been taken in Colorado by Mr. Mead, on the mountains about the South Park and 

 in the Park itself Mr. W. II. Edwards has also sent me specimens from Nevada, California 

 and Oregon, the last collected by Dr. Gabb. 



3. Pamphila Ottoe. 



Pl. X, S Fig. 6. Pl. xi, Figs. 13, IG. 



Pamphila Ottoe Kirb., Syn. Cat. Diurn. Lep., G02 ; Scudd. ! Syst. Rev. Am. Butt., 57. 

 Ilesperia Ottoe Edw. ! Proc. Ent. Soc. Philad., vi, 207. 



This species differs considerably from all the others, not only in its gi^eater size and paler 

 color, but in the almost total absence of any markings upon the under surface of the hind 

 winws ; faint spots are occasionally visible upon the otherwise uniform yellowish tawn}^ sur- 

 f;ice. It appi'oaches P. Nevada upon the upper surface in the narrowness of the bordering 

 band of dark bi'own, which even on the front wing does not extend fiir from the margin. 

 I have not seen the female, nor has it yat been described. Upper organ verj- stout, 

 strongly arched, rather deeply sulcate above posteriorly; centrum very broad above, 

 scarcel}' narrowing posteriorly until the hook is reached, which is scarcely one-fifth the 

 leno-th of the centrum, when it tapers rapidly to a very bluntly rounded apex ; lateral arms 

 closely resembling those of P. Manitoha. Clasps very large, extending quite as far back- 

 ward as the upper organ, nearly two and a half times longer than broad, not narrowing 

 greatly, the upper margin a little elevated near the base, the posterior margin rounded and 

 a little protuberant, the apical tooth a little incurved next the base, beyond upright, consid- 

 erably shorter than the nearly erect, incurved, stout, preapical tooth, from which it is sepa- 

 rated b}^ a pretty deep and rather wide, rounded excision, widening above ; it is supported 

 within by a low, slightly denticulate, or sinuate lamina, the extension of its inner anterior 

 edge, which terminates in a slight denticle at some distance anterior to the preapical tooth. 



The species has been found in Kansas, Iowa, and according to Mr. Edwards, in the Indian 

 Territory. 



