26 



Hydriomena crokeri Swett. (PI. IV, Fig. 15; PI. IX, Fig. 3). 



We consider this a good species and not a variety of the preceding 

 as Hsted by Mr. Swett; in type of genitalia it is close to columbiata 

 Tayl. but apart from its yellowish-green coloration which is very 

 constant in our series of eight specimens, it may easily be recognized 

 by the subbasal line which is very strongly bent outward below costa, 

 whereas in cohtmbiala this line is generally quite rigidly oblique, only 

 occasionally showing a slight bend ; another feature is a tendency to 

 show considerable whitish shading in the subterminal dark band, which 

 when present seems quite characteristic. The Uncus also shows points 

 of distinction, possessing a short neck and being rather intermediate in 

 the shape of the forks between columbiata and calif orniata. We have 

 a single ? from Salem, Oregon, our other specimens having been 

 captured in the vicinity of Victoria, B. C, in April and May. 



Hydriomena muscata sp. nov. (PI. IV, Fig. 9; PI. IX, Fig. 4). 



We have three S specimens from Eldridge, Sonoma Co., Calif, 

 captured in February, which, on account of the similarity of Uncus and 

 the fact that the subterminal band shows white shading, may prove to 

 be a southern race of crokeri; as however the general appearance is 

 quite different we treat it for the present as a distinct species. The 

 primaries are dark mossy green, crossed by the usual dark bands and 

 with tlie median area whitish, strongly narrowed toward inner margin 

 and with slight ruddy shading in the fold; the subbasal line is bent 

 below costa much as in crokeri; line 3, bordering the median area 

 inwardly, is rather rigidly oblique, being only slightly waved ; the sub- 

 terminal band shows traces of white shading which in one specimen 

 has spread so as to obliterate entirely the central portion of the band. 

 Our types in the Barnes Collection are the three specimens already 

 mentioned. 



Hydriomena califo'kni.'VTA Pack. (PI. V, Figs. 1, 2; PI. X, Fig. 2). 



On a recent visit to the Cambridge Museum of Comp. Anatomy 

 we were unable definitely to locate Packard's type of this species which 

 was a specimen from California (Behrens), no sex being mentioned; 

 Mr. Swett at the time told us that it appeared to have been lost and 

 after a careful study of the original description we both agreed to 

 accept his identification of the species (C. Ent. 44, p. 229) as correct. 

 Since then he has written us that he has discovered the type in an old 



