292 AMERICAN LEPIDOPTERA. 



dark scales. Hind wings grayish-fuscous, cilia concolorous. Abdomen grayisli- 



fuscous; anal bush grayish. Ventral segments edged with silvery gray. Legs 



dark fuscous, femora and tibiae spotted with silvery white; tarsi whitish, joints 

 dark fuscous at their apices. Expanse 8 mm. ; .32 inch. 



Hab. — Penna. (Hazleton). 



Larva pale yellowish-green, with greenish dorsal line, i with four 

 transversely placed spots. On Vaccinium corymbosuvi (swamp 

 huckleberry) ; August and September. Imago April and May. 



O. cratsegifoliella Clem. — Palpi whitish, a spot on the second joint ex- 

 ternally and a broad annulus of the third joint dark fusco\is. Head grayish- 

 white, tufts dark fuscous, mixed with gray, somewhat tinged with russet Fore- 

 wings brown, with purple lustre ; eight or nine costal striae, outer six or seven 

 distinct; fifth stria, from the apex, extends in a straight line, more or less dis- 

 tinct to the dorsal margin, bisecting a dark dash in middle of wing, another dark 

 line on the disk before the middle. A heavy dark line in basal part of fold ; 

 plical spots elongate triangular, conspicuous, not reaching the dorsal margin ; 

 subplical space white, speckled with fuscous. Cilia around the apex not tipped 

 with dark fuscous scales. Expanse 8-8.5 mm. ; .32-.34 inch. 



Hab. — Eastern States. 



Type in fairly good condition, in the Academy of Natural Scien- 

 ces, Philadelphia, Dr. Clemens' description, however, does not 

 tally well with the former, as he describes the labial palpi as whit- 

 ish, without mentioning the dark spot on the second or the annulus 

 on the third joint. 



Larva on Cratcegus tomentosa (Hawthorn ) ; 0. imisitatumella Ch., 

 which Chambers, misled by Clemens' description and also by the 

 habit of the larva, which does not leave the mine to pupate, con- 

 sidered as distinct, is according to Mr. Busck, identical with cratce- 

 gifoliella, the latter having seen the type. The food-plant being 

 the same. 



O. diibitella n. sp. — Pi. IV, fig. 4. — Very closely related to the preceding 

 and from which it differs as follows: Absence of basal streak in the fold ; plical 

 spots less distinctly triangular, the outer one in one specimen consisting of two 

 distinct lines or streaks. The subplical space more distinctly white towards the 

 base ; a dark fuscous or blackish spot on the extreme base of dorsal margin and 

 another just behind the anal angle. Its very distinctly larger size. Expanse 10 

 mm. ; .4 inch. 



Hab. — Penna. (Hazleton). 



Five specimens bred from a shrub, unknown to me. The larvae 

 were collected in August, 1899, the moths appearing the following 

 May, The only note on the primary stages states "larva at first 



