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Amphidasis cognataria fortitaria var. nov. (PI. XXVI, Fig. 2). 



The race of cognataria found in Colorado beyond the divide, 

 besides being generally somewhat larger in size is characterized by a 

 diminution of the heavy black peppering of the nimotypical form ; this 

 is especially noticeable on the basal and median area of secondaries, 

 the discal dot showing up very distinctly ; the t. p. line of both wings 

 is heavier than in average Eastern specimens and is bent back on the 

 primaries from vein 5 almost to the base of vein 2 whereas in the 

 typical form the normal course of this line is considerably further out- 

 ward than the base of this vein ; this feature however is not absolutely 

 to be relied upon as Eastern specimens quite frequently occur with as 

 strong a bend as is found in Colorado specimens. We propose the 

 name fortitaria for this race, our types being 5 S's and 1 9 from 

 Glenwood Spgs., Colo, apparently representing two generations as the 

 dates of capture range from June 15-Sept. 1. 



Amphidasis cognataria form swettaria form. nov. (PI. XXVI, 



Fig. 6). 



Corresponding to the form doubledayaria of the European species 

 bctularia L. we have in our collection a single melanic S of cognataria 

 from New Brighton, Pa. in which both primaries and secondaries on 

 both sides are entirely suffused with black, rendering the maculation, 

 with the exception of the discal lunule, practically obsolete. We pro- 

 pose to name this interesting form after our friend, Mr. L. W. Swett, 

 whose work on the Geomctridae is too well known to need further 

 mention. 



Phaeoura Mexican aria Grt. (PI. XXVI, Fig. 1). 



This species was described from a $ taken in Gallinas Canon, 

 Las Vegas, N. M. by Prof. Snow; Grote also doubtfully associated 

 a 5 with this $ , following the description ; both $ and 9 types 

 are in the Snow Collection at Lawrence, Kansas and were recently ex- 

 amined by Dr. McDunnough. It is doubtful if the $ , which is a worn 

 specimen and difficult to place accurately, belongs to the same species 

 as the $ ; it would be well therefore to restrict the type to the S spe- 

 cimen. This type proves to be different to the usual conception of 

 mexicanaria as distributed by Dr. Hulst; Grote in the description makes 

 particular note of the long projecting tooth of the t. a. line in the 

 cell and this feature is borne out by the type specimen ; we have a 

 single $ from Pinewood, Colo, which agrees with mexicanaria type 



