LEPIDOPTERA 



497 



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

 the spots confluent ; hind vvino^s, discal spots very distinct, black ; outer 

 line of spots more distinct than above. 



Viri2^in Bay, Prince William Sound, Alaska, June 25. 



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



Eustroma silaceata Hiibn. 



Eusironia silaceata HiJBN., 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. 



Tiphroclystis zyganidata 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 miseridata Grt., Proc. Ent. Soc. Phil., 2, 32, 1863. 



Twro 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 Jiebilis sp. nov. 

 Expands 24 mm. Palpi front and antennas 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 o\'er 

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

 cross lines, and bi'oadened 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. 

 Proc. Wash. Acad. Sci., December 1900. 



