[497] LEPIDOPTERA 223 



more distinct, middle band much less marked, outer line more distinct, 

 the spots confluent ; hind wings, discal spots very distinct, black ; outer 

 line of spots more distinct than above. 



Virgin Bay, Prince William Sound, Alaska, June 25. 



Type. Cat. no. 4919, U. S. National Museum. 



Eustroma silaceata Hiibn. 



Eustroma silaceata HUBN., Vog. & Schmett., 100, 1793. 



One example : Kukak Bay, July 4. 



Submitted to Dr. Hulst, who called it a very light form of Eustroma 

 atrocolorata Grt. & Rob., but obviously incorrectly. 



Tephroclystis perfusca Hulst. 



Tephroclystis perfusca HULST, Can. Ent., 30, 116, 1898. 



Four examples : Popof Island, July 9-15. 



Determined by Dr. Hulst as a varietal form of this species. 



Tephroclystis zygaenidata Pack. 



Tephroclystis zygeenidata PACK., Mon. Geom., 51, 1876. 



Four examples: Sitka, June 16; Yakutat, June 21. 



This also is a varietal form, not the typical species, according to Dr. 

 Hulst's determination. 



Tephroclystis miserulata Grt. 



Tephroclystis miserulata GRT., Proc. Ent. Soc. Phil., 2, 32, 1863. 



Two examples : Popof Island, July 15. 



Again a varietal form of the Atlantic coast species, according to Dr. 

 Hulst, who examined a specimen. 



Tephroclystis flebilis Hulst. 



One example, which, being new, is described as follows by Dr. 

 Hulst : 



Tephroclystis flelilis sp. nov. 



Expands 24 mm. Palpi front and antennae dark fuscous ; thorax 

 fuscous in front, fuscous gray behind ; abdomen gray, very light later- 

 ally ; fore wings narrow, elongated, fuscous, darker, almost blackish 

 fuscous narrowly along costa and broadly outwardly extending over 

 marginal field ; the black of costa broken as showing the beginning of 

 cross lines, and broadened into a subquadrate spot within outer line ; 

 basal line scarcely evident ; outer line broad, indeterminate, whitish ; 

 an outer scolloped dentate white line on outer field, parallel with 

 margin ; hind wings rather small, rounded, fuscous, the beginnings of 

 dark cross lines showing along inner margin ; marginal lines on all 

 wings black, more or less broken. Beneath much as above, but with 

 a rounded broad extra-discal line on hind wings. 



