346 S. II. SCUDDER ON THE SPECIES OF 



5. Aj)icfil teeth of clasp very closely approxlinateil, oftoii appeaiiiis iit Krst sight as if single ; anterior inner 

 edge of apical tooth but little produced as a slightly and bluntly toothed lamina ; a distinct notch in 

 advance of the preapical tooth; posterior border of clasp sul):iugulated, scarcely produced beyond the 



apical tooth 6. 



5. Ai)ical teeth of clasp less closely approximated, readily distinguishable ; anterior inner edge of ajiical 

 tooth produced as a sharply and distinctly denticuhite lamina; no distinct notch in advance of the pre- 

 apical tooth; posterior border of clasp roundeil, jiroduced considerably beyond the apical tooth . 7. 

 6. Apical teeth of clasp very closely crowded together, the preapical slightly the longer ; lamina con- 

 tinuing the inner anterior edge of the apical tooth moderately high Colorado. 



6. Apical teeth of clasp not so closely crowded together, and of equal length; lamina continuing the 



inner anterior edge of the apical tooth very low and inconspicuous Manitoba. 



7. Posterior margin of clasp smooth, rounded ; inner anterior edge of apical tooth forming a denticulate 

 lamina, more nearly transverse than horizontal in its relation to the clasp, the largest dcnticulations 

 above, the lamina terminating gradually, opposite the posteiior border of the preapical tooth . Juba. 

 7. Posterior niaro-iu of clasp ragged and irregular; inner anterior edge of apical tooth forming a denticulate 

 lamina, more nearly horizontal than transverse in its relation to the clasp, the dcnticulations as 

 larii-e below as above, the lamina falling abruptly oft' at its anterior extremity opposite the anterior 

 border of the preapical tooth comma. 



DESCRIPTIONS OF THE SPECIES OF PAMPHILA. 



1. Famphila Sassacus. 



Pl. X, t? Fig. 5, ? Fig. G. Pi., xi, Figs. 9, 12, 14. 



Pamphila Sassacus Kirb., Syn. Cat. Diurn. Lep., 599; Scucld. ! Syst. Rev. Am. Butt., 56. 

 Hesjyeria Sassacus Harr. ! Ins. iiij. Veg., od ed., 315. 



This familiar species is I'eadily distinguislied from tlie others ; the wings are broadly and 

 distinctly bordered above with dark brown, wliicli does not gradually merge into the 

 oran"-e-tawny 1jase ; and l:)0th sexes have a distinct longitudinal dash of dark brown in the 

 basal half of the mterspaces beyond the cell, barely separated from the dark border of the 

 Mv'imr, and much more distinct than in the other species ; it is present in the others to a 

 greater or less extent, but is generally wliolly absent from the extreme base of these inter- 

 spaces, and is never conspicuously contrasted with the neigliboring parts ; while here it 

 resembles Napa Edw./ to which species this bears a strong resemblance upon both its 

 upper and under surface. The under surftice of the hind wing differs from most of the 

 species in the faintness of the mesial band ; it is not, however, so faint as in P. Ottoe, and it 

 is larger than these, consisting, when most conspicuous, of a faint series of pale, quadrate, 

 equal spots of moderate size in the suljcostal and median interspaces, longer than broad, 

 forming a regular curve, their outer edges removed by the length of the spots from the 

 outer border, and those of the two areas connected by a similar spot in the subcosto-median 

 interspace, removed from the border by only half, or less than half, the distance to Avhich 

 the others are distant from it. Upper organ strongly arched, very deeply sulcate above pos- 

 teriorly ; hook two-thirds the length of the centrum (or the mass of the horizontal portion 

 of the organ), nearly straight, equal and very slender, as viewed above, tapering deUcately 



^ Ilesperia Napa Edw., does not belong to this genus, from Liinocliores. Tlie two species form a group liithcrto 

 as asserted in my Systematic Revision, but is congeneric unchiiractei-ized, and to which I apply the name Pyrrho- 

 witb Hesperia Mi/slic Edw., which again must be_ separated sidia with Ilcqwia Mystic Edw. as the type. 



