350 S. H. SCLTDDER ON THE SPECIES OF 



beiii"' white, nearly square and equal, and forming a belt, bent in the middle almost exactly 

 at a right angle, or in the females at slightly less than a right angle ; in the males the belt 

 is almost wholly continuous, although sometimes Ijroken at the lower subcostal nervure, but 

 in the females it is usually broken both here and at the upper median nervule ; the ground 

 color in both sexes is a greenish griseous. Upper organ as in P. Colorado, but considerably 

 stouter. Clasps not large, extending nearly as for as the upper organ, nearly or quite as 

 long as broad, the upper border furnished with a slight swelling next the base, but other- 

 wise tapering regularly ; the posterior margin well rounded, extending considerably be3'ond 

 the apical tooth, as in P. comma ; this is slightly shorter than the preapical tooth, and sep- 

 arated very narrowl}^ from it by a deep rounded excision ; both the teeth are incurved, but 

 nearly erect ; the inner anterior edge of the apical tooth is sharply denticulated, but it 

 hardly extends forward into a serrated lamina. 



This butterfly occurs in California and in the neighborhood of Salt Lake City, Utah. 



6. Pamphila comma. 



Pl. X, c? Figs. 12, 13, 9 Figs. 14, 15. Pl. xi, Figs. 10, 11. 



Pamphila comma Fabr., 111. Mag. Ins., vi, 287. 

 Hesperia comma Linn., Syst. Nat., Ed. x, 484. 



This species is too well known to require a description of the ornamentation of the w'ings 

 (see, however, the description of the succeeding species) ; but the abdominal appendages 

 are now described for the first time. 



Upper organ strongly arched, rather deeply sulcate al)0ve, posteriorly ; hook one-third 

 the length of the centrum and slightly curved downward ; together with the centrum 

 it is very broad at the base above, tapers roundly to a rounded apex, and is but little 

 longer than broad ; viewed from the side the hook is nearly equal, the apex pointed be- 

 neath ; lateral arms equal, cylindrical, tapering a little at the tip, not very widely separated 

 from the centrum at their base, curving slightly upward, of equal length with the hook. 

 Clasps about twice as long as broad, extending fuU}^ as far back as the upper organ, nar- 

 rowing pretty regularly from the base, the upper margin incurved and deflexed, the 

 posterior border rounded, extending beyond the apical tooth, and of a somewhat ragged 

 outline ; the preapical tooth is somewhat longer than the apical, but is incurved to such a 

 degree as to appear of the same length on a lateral view ; otherwise they are both nearly 

 straight, upturned and narrowly separated by a very dee]? rounded excision ; the irregu- 

 larly serrated lamina supporting the inner anterior edge of the apical tooth possesses five 

 or six slight serrations, and the lamina terminates abruptly opposite the anterior edge of 

 the preapical tooth. 



The appendages of the northern form (Catena) seem to differ from those of the normal 

 type only in sometimes having the preapical tooth no longer, or but very slightly longer 

 than the apical ; and in that the two teeth are always separated by a slightly wider interval 

 than in the normal form, approaching in this respect P. Nevada, and departing more widely 

 from P. Ilanitoha. 



This insect occurs in the north temperate zone of the Old World ; some details of its dis- 

 tribution are given in the introduction. 



