180 THE CANADIA.N ENTOMOLOGIST. 



nearly uniform seal brown (very near Ridg. iii., i, perhaps of a colour 

 between figs, i and 2). Expanse, 31 mm. Described from 2^^, 

 Portland, Multnomah Co., Oregon, April 23. 



Ichthyura albosigma. Fitch., var. specifica n. var, 



I apply this name to the form of /. albosigma from the Rocky Moun- 

 tains, which differs from the type by its much paler colour. Specimens 

 taken at Manitou, Colorado, May 2. 



In accordance with my custom in describing new forms, I give below 

 a table to separate the species of the genus. Under the term " vau Fitch 

 and allies," I refer to the nominal species mversa, Pack., van Y\X.c\\,brticei, 

 Hy. Edw.. bifiria, Hy. Edw., astorice, Hy. Edw., ornata, G. & R., and 

 inortiata, Neum. I have not at present the necessary material to form 

 a positive opinion as to the synonymy involved here, but I doubt if there 

 are more than three good species, the other names referring to geographi- 

 cal varieties of much the same rank as the var. specifica above described. 



The names apicalis, Barnst., and incarcerata, Bd., included in Prof. 

 Smith's list, I have not considered here ; but I hope to be able to offer a 

 complete revision of Ichthyura at a subsequent time. The following table 

 will show the relationships of the new forms described in this paper. 



§1. Third transverse line running from internal margin at or near the 

 origin of the fourth line and joining the second line at or about its 

 middle. 



Fourth line widened and white at costa. 



A series of subterminal interspaceal dots. 



Lines generally straight, - - inclusa, Hb. 

 Lines more or less, waved, vau. Fitch and allies. 

 Same produced into a series of dashes. 



With usual thoracic mark, - - strigosa, Grt. 



This mark absent on thorax, incuienia, Hy. Ed. 



No white on fourth line at costa - j'ocosa, Hy. Ed. 



§2. Third transverse line free from internal margin to costa. 

 General colour, dark grayish or clove brown. 



Fourth line not widened on costa, multnoma, Dyar. 



Fourth line widened and forming a white S-shaped 



mark, . - - - albosigma, Fitch. 



Qeneral coloiir, much paler, -^ - var. specifica, Dyar, 



