CHAMBERS ON TINEINA OF COLORADO. 135 



dusting almost equally dispersed over the head, thorax, and fore wings, 

 but infresh specimens it appears to bea little moredense above than below 

 the fold, and is not quite so dense on the head. Palpi of the general hue, 

 the second joint dark brown externally, with the tip and a band across the 

 middle whitish third joint with twoannuli, and the extreme tip fuscous; 

 antennae of the general hue, annulate with fuscous to a point beyond the 

 middle, and thence to the tip fuscous, with only four or five wide whitish 

 annuli. (Thus far the species from the Arkansas agree with those from 

 Colorado Springs, except that the former have only two whitish annuli 

 in the apical brown part of the antenna.) The dusting is a little more 

 dense on the wings of two of the six specimens than on the others ; in 

 all there is a distinct though faint goldeu ocherous streak along the fold, 

 interrupted in one specimen by two fuscous dashes and in the others by 

 one; there is another pale golden oeherous streak parallel to the fold, 

 beginning on the disk and extending to the apex, interrupted by two 

 brown dashes in four specimens and by only one in the other two, one 

 of these two being the same that has two dashes on the fold; cilia 

 whitish, those of the dorsal margin with a fuliginous tinge; hind wings 

 of a smoky hue. Abdomen of the general hue, densly dusted above with 

 fuscous, and with the posterior margin of each segment white without 

 dusting; anal tuft whitish; legs dark gray-brown, annulate with white. 

 Evidently this is much nearer prceangusta than salicipomonella, but the 

 alar expanse scarcely exceeds five lines, nearly that of salieipomnoslla, 

 which Mr. Staiuton gives as 5} lines, while he gives that of prwangusta 

 as seven lines. 



The first thing which strikes one on comparing with the above the two 

 specimens from the Arkansas (clemensella) is the much greater size and 

 darker color of the latter. The expanse of wings of these is a little over 

 seven lines, and while the Arkansas species appear to the naked eye as of 

 a dark gray hue, those from Colorado Springs appear whitish. In the 

 one, the dusting almost obscurest he ground color ; in the other, it is 

 scarcely apparent to the unaided eye. Indeed, I would describe the 

 Arkansas specimens as having the thorax rather densely dusted above 

 with dark gray-brown, and the wings dark gray-brown, sparsely dusted 

 with white, with a narrow white streak from the base to the middle of 

 the disk, a creamy spot on the fold almost surrounding a dark gray-brown 

 spot, and a row of somewhat confused white spots (eight or nine in num- 

 ber) more or less confluent, and one a't the apex ; but the two specimens 

 differ somewhat, one of them ( S ) having the whole basal part of the 

 wing above the fold creamy-white and only a little dusted with fuscous. 

 Abdomen dark gray-brown, each segment margined behind with silvery- 

 white, except that in the $ the anal segment is entirely brown and tuft 

 silvery -white. 



Cottonwood Creek (Upper Arkansas, near Mount Howard), altitude 

 about 8,000 feet. 



A specimen of Batravhedra clemensella and two of the supposed B. 



