obscured by blackish scales. Another feature is in the sexual spot on 

 the primaries of the male ; i& the first species this is rounded obovate, 

 scarcely twice as loUg as bi'oad, slightly darker than the ground color 

 of the wing; in the second, it is oblong obovate, three times as long 

 as broad,, obscui'e dark gi-eyish fuscous. 



To the former species Messre. Grote and Robinson, in their first 

 discussion of the species, apply the name of Thecla Falacer God. and 

 Boisd. and Lee; and to the latter that of T. calanus (Hiibn.). In 

 a subsequent paper they claim that Falacer (iod. and calamis Hiibn. 

 are the same species, so that the former name must be dropped; and 

 that the first species, formerly considered by them as Falacer, is un- 

 dcscribed; they therefore characterize it under the name of T. irwrata] 

 they also come to the conclusion that, under the name of Falacer, 

 Boisduval and LeConte have described Falacer and figured inorata. 

 " It seems to us," say these authors, " that T. calanus and T. Falacer 

 [inoratal are distinct species, the former to be distinguished by its 

 paler, more brownish color above, and by the fulvous marks of the 

 upper surlace of secondaries near anal angle." And again : '• From 

 this latter species Icalanus'} T. inorata differs by its smaller size, its 

 more blackish color, darker fringes and the absence of the orange 

 lunule on the upper surface of secondaries before anal angle." No 

 mention is made of any trenchant mark of distinction drawn from 

 the discal band of the under surface; we have seen, however, that 

 this forms one of the most important points of separation, while the 

 presence or absence of the colored spot near the anal angle of the 

 secondaries above is but of relative importance, from its want of 

 uniformity. 



It is probably owing to this fact that these authors have fallen into 

 the error of supposing that the second of the species which we have 

 briefly characterized above has been figured by Iliibner and described 

 by Godart. The very reverse is the fact; and while the first of tliesc 

 species has been described in full, or figured no less than three times 

 under as many diSerent names, the second is yet undescribed, except- 

 ing by the short compai'ative phrases which we have just used, and 

 by Messrs. Grote and Robinson, as quoted above. I propose, there- 

 fore, that the latter shall retain the name of T. Edwardsii, suggested 

 for it by Mr. Saunders, who probably first recognized its title to 

 independence. 



If we examine the illustrations of Hiibner in detail, we shall find 

 that his representation of the color of the upper surface of the wings i3 



