NYMPHALLNAE: POLYGONIA FAUNUS. 353 



the frout base of the crowning thorns; whole head covered with scattered, pale warts, 

 each giving rise to a long, tapering, pale, brownish yellow hair; next the neck the 

 head is mottled with dull luteous; crowning thorns black, as well as their spinules, 

 their hairs like the rest of the hairs on the head. Mouth parts brownish fuscous. 



Body dull brownish yellow in great part, especially on the sides ; the dorsal surface, 

 as far as and including the laterodorsal spines, is paler, and on the third to eighth 

 abdominal segments white, in certain lights snowy white, l)ut genei'ally dull, and 

 always forming a striking contrast to the other portions ; hinder part of body above 

 blackish ; on the sides of the abdominal segments there is a double, chain-like, dull 

 orange band, the spiracles seated in black spots occupying alternate links; frequent 

 slender, dusky or black transverse lines alternating with pale brown or whitish lines 

 are found on the front and rear of each segment, least conspicuous above : on the side 

 of each segment, most conspicuous on the abdominal ones, are three velvety black 

 spots, one, already mentioned, enclosing the spiracle, longitudinally obovate, another, 

 the most conspicuous, on the anterior halves of the segments, occupying the space 

 betAveeu the laterodorsal and suprastigmatal spines, longitudinally or a little obliquely 

 sublunate ; the third, smallest, consisting of an oblique dash, separated from the sublu- 

 nate spot by an oblique white streak, running forward and curving a little downward 

 from the laterodorsal spine. Beneath, the body is dark grayish brown with numerous 

 blackish fuscous, transverse lines and dots, and encircling the prolegs wreaths of dusky 

 or blackish blotches ; outside of the prolegs wholly blackish, paler at tip ; spines (86 : 82) 

 all white, with whitish spinules and whitish, occasionally a little dusky, needles, with 

 the exception of all the spines above the stigmatal line on thoracic and first and second 

 abdominal segments, which are pale brownish yellow, a little paler than the ground 

 color; legs black; claws luteous; spii'acles black, encircled by livid in a black field. 

 Length, 30 mm. ; breadth of body, 4 mm. ; of head, 2.85 mm. ; length of head spines, 

 1.25 mm. ; of body spines, 2.15 mm. 



It diflers from P. comma in the possession of a W on the frout of the head and in 

 lacking the ferruginous spots on the body ; and from P. progne and P. c-album of 

 Europe, iu not having a pale, supraorbital band on the head ; from the latter, with 

 which it agrees closely iu ornamentation, it differs strikingly in the character of the 

 spines, which x'esemble rather those of P. comma. It is readily distinguished from 

 all other New England species in the contrast of colors upon the back. 



Chrysalis (83:31, 33-35). Pale wood brown, streaked with greenish dusky; the 

 tubercles are generally dusky upon one side, pale tipped ; but the outer, posterior sur- 

 face of the laterodorsal tubercles of the second abdominal segment are silvery or 

 nacreous, extending in a patch to the hinder edge of the segments; similar nacreous 

 spots occur on the first abdominal segment and on the metathorax ; the abdomen is 

 tinged considerably with dark green, which is, however, nearly or quite absent from a 

 narrow dorsal streak and lateral triangular patches on each segment between the 

 suprastigmatal and laterodorsal tubercles, broad at the extremity and narrow at the 

 base of each segment; there is a broad, greenish fuscous, stigmatal streak on the fifth 

 to eighth abdominal segments, darkest, almost black, beneath, and pale along the 

 middle, extending, beneath, a short distance upon the fourth segment; under surface 

 of cremaster longitudinally streaked with black and pale salmon; there are also slender, 

 curving, subventral streaks of the latter, most distinct upon the fifth and sixth abdomi- 

 nal segments ; each pair of legs marked at the middle and just before the tip with 

 black. Mesonotal tubercle low, twice as long as high, well rounded iu front, abrupt and 

 angulated behind, the edge parallel to the slope of the mesonotum ; ocellar prominences 

 very long and slender, equal, with the inner angle of the tip prolonged, tapering and 

 turned a little inward, resembling exactly the apical half of that of progne; as there, 

 too, a broad U is foi-med by the inner edges of the ocellar prominences, but it is deeper 

 than iu that species. Extreme length, 23.5 mm. ; ocellar prominences 28 mm. apart 

 at tip ; width of thorax, 0.6 mm. ; height of same, including tubercle, fi.25 mm. : width 

 of abdomen, 7.2 mm. ; height of abdomen, fi. 15 ram. 



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