LYCAENINAE: ERORA LAETA. 



821 



continuous spots formini; a tortuous narrow stripe, with no interior black borderiii!; ; 

 it is usniilly rontinuous only from the upper subcostal to the upper median nervules, 

 and its course is as follows; it crosses the costo-subcostal interspace at its middle; 

 the upper subcostal further out, in the middle of its basal two-thirds ; the next inter- 

 space just below tliis and the following removed outward by its own width ; tlie upper 

 median interspace at the very base and the lower on a line with the spot of the sub- 

 costo-median interspace; the interspaces below, asain as a sli!2;htly curved or sinuous 

 stripe, on a line with the spot in the upper median, and in tlie middle of the medio- 

 submcdiau interspace; the outer series of spots is pretty regularly arcuate, subparallcl 

 to the outer border and removed from it by about the width of an interspace, that in 

 the upper lialf of the medio-submediau interspace a little further from tlie base; the 

 spots are small, triangular, or sf)metiuies rounded, decrease in size upwardly above 

 the lower median, are found in each interspace below the upper subcostal nervule and 

 are faintly and narrowly bordered with mingled black and whitish scales, the black 

 seldom present on the sides ; the wing is slenderly edged with a pale line bordered 

 exteriorly with blackish and the fringe is reddish orange at base, pale at apex, and 

 below tipped witli black. Abdomen black above tinged with pale blue anil pale brown 

 on the sides; beneath whitish or silvery gray. Appendages not studied. 



Measurements in millimetres. 

 Length of tongue, 3 mm. 



Length of fore wing 



antennae 



hind tibiae and tarsi... 

 fore tibiae and tarsi . . . . 



Described from 13,3?. 



Egg (65:8). Pale pea green, the raised points hoary, about. 03 mm. apart and 

 about .02 mm. in height. Micropyle .1 mm. in diameter, consisting of about live 

 unequal, kite shaped, central cells surrounded by a crowded mass of pentagonal cells 

 with their shorter axis about .01 mm. in length, directed toward the centre. Height 

 of egg, .32 mm. ; diameter, .72 mm. 



Distribution (23 : -). This is aii exceedingly rare butterfly iu the east, 

 having been taken on very few occasions, but these show it to be widely 

 spread. It has been found at St. Joachim, twenty-five miles from Quebec 

 (Bowles), London, Ontario (Saunders), the Catskills, N. Y. (Edwards), 

 Atlantic City, N.J. (Aaron) and Cualburgh, Kanawha Co., W. Va. (Ed- 

 wards). Single specimens only have been taken at any one time. In the 

 west, however, it has latterly come to light in considerable numbers on Mt. 

 Graham, Arizona, some thousands of miles from its nearest known rela- 

 tives. 



In New England it has been taken in two localities in Maine, Streaked 

 Mountain near Paris (Smitli) and Oi-ono (Fernald). On my last collect- 

 ing tour in the Graylock Hopper at W'illiamstown, ilass., where I first 

 began my chase for butterflies more than thirty years ago, musing over the 

 butterflies whose early stages were unknown, my thoughts turned to the 

 present species, and recalling thereby the lines I had already placed at its 

 head in this work, I repeated them aloud, almost imconsciously. I had 

 not gone half a dozen steps before I came to a damp spot in the road. 



