LEPIDOPTERA OP NEW YORK AND NEIGHBORING STATES 649 



Montreal to Pennsylvania, Illinois, Vancouver, Idaho, and California. New York: 

 Ithaca, Van Cortlandt Park, New York City. 



4. 0. cineraceus Fish. Grayish to brownish white. Thorax often with the tips 

 of the te"gulse darker; abdomen darker with a pale dorsal band containing dark 

 dots; tibise tufted; tarsi usually annulate. Wings narrow. Fore wing, in dark 

 specimens, with pale veins; dusted with black scales, .sometimes very sparsely; 

 base of cleft white, preceded by the usual black dash; with a spot opposite it 

 and dark subterminal dots on the costa. 28 mm. 



O. cineraceus differs from 0. cretidactylus, and from Adaina ambrosice, which 

 may run to it in the key, by the narrower wings not mottled on the basal half. 

 Pennsylvania; western States. 



5. 0. brucei Fernald. Pure white. Scale tufts on fore and middle tibiae nearly 

 obsolete. Fore wing with more or less gray -brown scaling, becoming a strong 

 gray mottling in dark specimens, with the usual dark spots on cell and costa. 

 Subterminal costal spot confined to membrane. 22-27 mm. (chionastes Meyrick.) 



June to August. 



Pennsylvania, western States. Massachusetts ( ? ; my specimen is not at hand and 

 may belong to another of the light gray species of this genus). 



6. 0. inquinatus Zeller. Similar to Adaina ambrosue, normally larger, without 

 any brownish tint ; costal markings similar, but practically confined to the fringe ; 

 the dorsal fringe with clear white bars, two of those in the dorsal fringe of the 

 second feather conspicuous. Abdomen with paired black dorsal dots, mottled with 

 white. 20 mm. 



June to September. Caterpillar apparently undescribed, on Ambrosia. Of the 

 species confused with this by Miss Murtfeldt, and apparently bred by her from 

 the same food plant, Adaina ambrosice is distinguished by the clay color or light 

 wood-brown shading in the axis of the first feather of the fore wing, and by the 

 unpaired black dorsal dots on the abdomen; and Marasmarcha pumilio by the black 

 tufts on the inner margin, as well as by the structural characters. 



New York to Illinois, Iowa, California, and south. New York : Ithaca. 



7. 0. linus Barnes and Lindsey. White. Fore and middle tibiae with longitudinal 

 gray stripes, not tufted; hind tibiae with gray on spurs, and sometimes at tar sal 

 joints; abdomen with a series of mid-dorsal dots, sometimes connected. Fore wing 

 narrow, more or less dusted with black, especially at the apices of the feathers and 

 on the inner margin; usual postmedial markings present; a few blackish dots 

 at tips of veins, sometimes lost in the black dusting; fringe gray, cut with white 

 at the veins. Hind wing brownish gray. 22 mm. ( brucei in part ? ; lienigiwnus 

 Zeller ?.) 



The coarse black dusting is characteristic. 



June and July. 



Hampton, New Hampshire, to Pennsylvania and Ohio. 



8. 0. homodactylus Walker. Pure white. Fore wing with a little gray shading 

 on under side, and with traces toward costa above. Sometimes with a faint darker 

 dot at base of cleft, and dots at tips of veins. Middle tibiae with a fringe of scales, 

 but no tufts. 25 mm. (elliottii, in part). 



This species is usually confused with 0. elliottii, from light specimens of which 

 it is sometimes only distinguishable by the different tufting of the mid-tibia. The 

 single New York record below is based on specimens determined by Barnes and 

 Lindsey; it is probably not rare, but confused with elliottii. 



Larva on Solidago. Green with yellowish head and a broken irregular yellow 

 dorsal line; a yellow lateral line, above iii, and traces of a stigmatal on the thorax. 

 Hair whitish, slightly barbed; tubercles i and ii contiguous, i with 4 setae and ii 

 with 2 long and 2 shorter ones, ii with two short and a long; iv+v and vi each 

 with about 12 hairs; posterior part of segment with a single hair behind iii and a 

 small wart with 4 hairs behind iv+v. Prothorax with two patches of hair point- 



