20 [July 



form marbling, undoubted specimens of C. Oenn, which have no spots 

 whatever, and of those about which I am in doubt whether to place 

 with one or the other, some have and some have not these black spots, 

 and when in this they approach C. Oeno they are quite as apt in 

 their other characters to resemble C. Also. Neither am I able (the 

 only other resort) to separate those with the nearly uniform marblins 

 from all the rest, since some of the latter have the course of the middle 

 band precisely the same, have the black spots on the secondaries, and 

 show the markings through upon the upper side in some cases as well. 

 So that the result of my comparisons is, that I cannot believe that the 

 individuals separated by Moschler as two distinct species under the 

 names which Boisduval first gave them of C. Oeno and C Also, in 

 reality belong to more than one rather more than usually variable 

 species. 



6. Chionobas semidea. 



Chionobas semidea Edwards, in Morris' Synop. Lepidopt. N. Amer. 351. 

 Scudder, Proc. Essex Inst. III. 169. 



" Bost. Jour. Nat. Hist. VII. 621. PI. XIV, figs. 2-8. 



Hipparchia semidea Say, Amer. Ent. PI. 50. 



" Ent. of N. Amer. (Ed. Leconte). I. 113. PI. 50. 

 Harris, Ins. injurious to Veg. (Ed. 1862), 304, fig. 126. 



Cmnonympha semidea Morris, Synop. Lepidopt. N. Amer. 80. 



Chionobas Also Boisduval, Icones. hist. des. Lepidopt. I. 197. 



" Hist. gen. et Icones Lepidopt. de I'Amer. Sept. 197- 



Satyrus eritiosa ! Harris teste Boisduval, Icones hist, des Lepidopt. I. 197. — 

 (See my remarks on p. 13.) 



Expanse of wings % i.80 — 2.06, average 1.92 in. $ 1.76 — 2.08, ave- 

 rage 1.98. 



Head, thorax and abdomen black with blackish brown and yellowish 

 brown hairs, the latter especially upon the abdomen ; back of head 

 and front of thorax with many grayish scales. Antennae brownish- 

 yellow, generally paler or brighter on the club with a line of black 

 scales above, generally continued to the tip, and of white scales on the 

 stalk below; extreme tip of club often dusky. Palpi with long blackish 

 hairs below, short whitish hairs above. Legs dark brown, femora 

 darker than tibiae or yellowish-brown ; tibiae, especially anterior pair, 

 flecked with gray. 



Wings above nearly uniform dark brown, the markings of the under 

 surface of secondaries appearing through, the whole outer margin deli- 

 cately edged with black; beneath, primaries a little paler, apex nuirbled 



