1158 THE BUTTERFLIES OF NEW ENGLAND. 



broader than higli, the summit broadly rounded ; deepest below the front, scarcely ap 

 pressed; sutures narrowly im|)ressed, trianffle ooiisideral)ly liiglier th.an broad, extend- 

 ing about thrce-flfths way up the front ; head covered, esi)ecially on upper half, with 

 rather distant, small, conical warts bearing a not very long, moderately stout hair, 

 and, especially on lower half, with numerous minute warts each bearing a not very long, 

 delicate hair, .\ntennae with tlie first joint very plump and short, the second exceed- 

 ingly short, scarcely discernible, the third as large as the second and as long as broad, 

 the fourth exceedingly minute. <)celli six in number, the four prominent ones arranged 

 exactly as in Pieris, with the impressed line in front of them, the fifth behind and a lit- 

 tle above the first and as f.ar removed from it as tlie third from the fourth, the sixth be- 

 hind tlie row and at equal distances from the first and fourth, with which it forms 

 sliglitly more tlian a right angle. Labrum large and moderately broad, the front ex- 

 cised in tlie middle Ijy the meeting of the well-rounded curves which border the front 

 of each lateral half. Mandibles rather small,, moderately broad, not stout, the edge 

 strongly curved, dentate above, denticulate below, the teeth not very delicate, tliough 

 small. Maxillary palpi exceedingly short, the joints all much shorter than broad. 

 Spinneret very small, short and tapering. 



Body nearly uniform throughout, though tapering to an exceedingly slight degree 

 toward either end, the segments divided by slightly imjiressed transverse Hues into 

 sections, of which there are five on the second and third thoracic and first abdominal 

 segments, six, of which the first is largest, on the second to sixth abdomin.al seg- 

 ments, three or four only on the seventh and eighth abdominal segments; each 

 section is furnished with a transverse row of small conical warts pretty regularly 

 disposed, each bearing either a short, stout, equal iDristle, often scarcely longer than 

 itself and abruptly docked, or a moderately long, tapering hair; besides, the liody is 

 thickly clothed with very minute warts, bearing each a short, very delicate hair; the 

 posterior edge of the last segment is produced backward a little at the outer angle and 

 armed with a number of hair bearing warts. Spiracles small, scarcely half as long 

 again as broad. Legs pretty long, stout, tapering, the joints moniliform, the last two 

 a little appressed, tlie claw very small and delicate, slightly curving, heeled at the 

 base. Prolegs pretty large, moderately stout and plump, tapering somewhat and regu- 

 larly, each armed at the tip with twenty to twenty-four booklets, ^vhich are not very 

 long, rather stout, tapering, not greatly curved, bluntly pointed and arranged in a 

 double and in the middle of each series a triple row in a gentle curve. 



Chrysalis. The head is well rounded, the central prominence conical, bluntly pointed, 

 no longer than broad, stout; the prothorax bears on its anterior edge a pair of small, 

 conical, bluntly pointed, forward directed, subdorsal tubercles, nearly twice as long as 

 broad, projecting over the extreme base of the antennae. Median ridge of thorax high, 

 especially on tlie mesonotum, where it is pretty strongly compressed and elevated into 

 an angular pi'ojection in the middle, the front slope of which is nearly straight, tlie 

 posterior at a little more than a right angle to it and slightly convex, only a little raised 

 above the direction of the whole dorsum of body behind. The lower surface from 

 eyes to wing tips is nearly straight, continuous with the ventral surface of abdomen ; 

 the sides of the wings straight and parallel, the basal wing tubercle much as in Pieris, 

 but a little and narrowly protuberant. From the upper border of the eye a slight ridge 

 runs backward in a straight course through the basal wing tubercle toward but not to 

 the upper posterior portion of the wing. First three abdomin.al segments very broadly 

 rounded above, just within the edges of the wings furnished on either side from the 

 base of the second segment backward with strongly compressed, somewhat divergent 

 ridges, elevated to a little tooth at the anterior limit of the third segment and beyond 

 this forming a distinct and slender but not greatly elevated suprastigmatal ridge reach- 

 ing to the sides of the cremaster; a median carina, distinct but not greatly elevated 

 on the fourth and succeeding abdominal segments ; the sides between the ridges well- 

 rounded. Preanal button much as in Pieris, the apical tubercles broad oval, greatly 

 depressed and recumbent. Cremaster viewed from above long and rather slender, 

 tapering considerably, twice as long as the medium breadth, channelled longitudinally 



