834 THE BUTTERFLIES OF NEW ENGLAND. 



near the (jrouml, l)iit often flies to a considerable height. Mr. Faxon remarks 

 that small companies may be seen from six to twelve feet above the ground 

 sporting about cedar trees, and adds that they very much prefer to remain 

 about the same tree. Their habits of moving the hind wings has been 

 observed by many ; Fletcher says "when visiting the flowers of Anten- 

 naria for honey, it has a curious habit of slowly moving its lower wings, 

 while closed, alternately up and down" ; this gives it an appearance of 

 satisfaction at its repast. 



When at complete rest, the wings are held erect, tiie front edge of the 

 hind wing reaching the upper median nervule of the fore pair ; the body is 

 parallel with the surface of rest, and the antennae, as seen from the side, 

 arcuate to the base of the club, the latter straight and parallel to the body ; 

 as seen from the side they are perfectly straight throughout and spread at 

 rijjht angles. 



Desiderata. The intermediate stages of the caterpillar should be de- 

 scribed and its behavior, the food plant being very different from that of 

 other species of the genus. Does it ever feed on the other plants sug- 

 gested as its food, — Juniperus, Lupinus? and what sort of a place does the 

 caterpillar seek for change to chrysalis ? We have much to learn about 

 the distribution of this butterfly, and no parasites are known. 



LUST OF ILLUSTRATIONS.-INCISALIA NIPHON. 



General. Imago. 



PI. 23, fig. 3. Distribution in North America. PI. 6, fig. 21. Female, upper surface. 



Egg. 23. Male, liotb .surfaces. 



PI. 6.5, fig. 7. Plain. 13:1. Plaiu, botli surfaces. 



68:7. Mici-opyle. 34:21. Male abdominal appendages. 



Caterpillar. 39 : 13. Neuration. 



PI. 7.T, fig. 24. Full grown caterpillar. 46:26. Androconiuni. 



Chrysalis. 

 PI. 84, fig. 38, 40. Side views. 



INCISALIA IRUS.— The hoary elfin. 



[Blaeli l)rown bair streak butterfly, swamp brown hair streali butterfly (Abbot); hoary elfin 

 (Scudder) ; pearly streaked butterfly (M.aynard).] 



Polyrtmmatus irus God., Encycl. mi5th., Thecla it'tis var. arsace Edw., Cat. Lep. 



i.x : (;iO, C74 (1S19). Amer., 41 (1877);— Fern., Butt. Me., (1884). 



T/iecla irns Boisd.-LeC, L(5p. Am(!r. sept, Thecla irus var. mossii H. Edw., Pap., i: 



101-in2, pi. 31, figs. .% 6 (1833) ;— Morr., Syn. 54 (ISSl). 



Lep. N. Amer., i)7 [iris] (1862) ;— French, Thecla arsace Boisd.-LeC, L6p. Am(!r. 



Butt. east. U. S., 27:! (1SS6);— Mayn., Butt. sept., 103-104, pi. 32, figs. 1-5 (1S33) ;— Morr., 



N. E., 37, pi. 5, figs. 46, 46a (1886). ' Syn. Lep. N. Amer., 97-98 (1862). 



Incisalia irus Scudd., Syst. rev. Amer. Thecla henrici Grote-Rob., Trans. Amer, 



butt., 32 (1872). ent. soc, i: 174-175 (1867) ;— Scudd., Proc. 



