8 WM. H. EDWARDS. 



and quite unlike the members of the genus to which it appears to 

 belong. In structure it agrees best with Apodemia, (I might say, it 

 agrees altogether), but the pattern of the under surface is not like 

 any member of that genus known to me, being more like the arrange- 

 ment found in Echenais. If color can be called a structural character 

 therefore, the species belongs to no known genus; but as I do not 

 consider this to be the case, I should certainly refer it to Apodemia, 

 In some respects Nais reminds me of Nemeobius, but the much less 

 developed club to the antennte at once precludes the possibility of 

 referring it to that genus." 



To Apodemia Kirby refers 3Jormo, Virgulti and allies, which in my 

 Catalogue stand under Lemonias. I therefore place Nais with them, 

 in Lemonias, Westwood, which covers Apodemia. 



Melita'a Arachne, Edw., $, Trans. Am. Ent. Soc. ii, p. 372, 1869. 



I described Arachne from a single example taken in Colorado, and 

 expressed a doubt whether it might not be same as Minitta, Edw., 

 Proc. Acad. Nat. Sci. Phila. 18B1, 161. 



Of late years many examples of both forms have been taken in 

 Colorado, Arizona and West Texas. Mr. Neumoegen found Arachne 

 common at Oak Creek Canon, South Colorado ; and I have seen it in 

 his collection. The two forms are equal in expanse of wing in the 

 sexes, the 2 % 's measuring from 1.2 to 1.4 inch, the 2 $ 's about 1.4 

 inch. Both sexes are alike in markings and color. The only permanent 

 diiference which I have been able to discover is in the markings about 

 the hind margins of secondaries on under side. In Minuta this margin 

 is white, without black on the edge ; a little within is a fine black line 

 and en this line rests a series of large white spots, the anterior sides 

 rounded. The posterior side of each spot rests on the black line and 

 therefore is no mere curved than the line itself. 



In Arachne the hind margin is edged wi'h a fine black line; and 

 instead of a submarginal fine line, the spots are placal on black ground 

 and the posterior side of each is largely incurved, sometimes much 

 angulated and this makes a black space quite unUke the mere line of 

 Mhinta. I have before me 6 Minuta % 9 , and 6 Arachne % 9 , and 

 ihcse difi"erences are constant. All the examples which Mr. Neumoesen 

 .--liowcd me Avere of the Arachne type. 80 were four (2 ^ . 2 9 ), for- 

 merly sent me by Mr. Boll from "West Texas, and 1 % which I have 

 from Arizona. This is enough to distinguish one form from the other. 

 and I shall Catalog-ue them as two species. 4'>'achne seems to inhabit 

 a more southern region than Minnta. 



