WM. G. DIETZ, M.D. 293 



makes a nepticula-like tract, later forms a cocoon under the turned 

 oyer edge of the leaf, the form of the latter is ovate." Undoubt- 

 edly distinct. 



O. coiispicnella n. sp.— PI. IV, fig. 5. — Palpi white; apex of second joint 

 and the third joint at middle spotted with dark fuscous, less distinct within. 

 Head whitish, tufts pale fuscous, intermixed with pale yellowish. Forewing a 

 rich, deep brown, with purple lustre; markings very conspicuous; eight or nine 

 costal strise, outer four very distinct, becoming more approximate and effaced 

 towards the base; an oblique dash at end of cell ; first plical spot large, triangu- 

 lar, apex not quite reaching the dorsal margin, second plical spot large, subquad- 

 rate, including the dorsal margin and extending somewhat along the latter 

 towards the base, another dark spot at eud of subplical space, immediately beyond 

 the latter is a curved dorsal streak, the end of which approximates the dark 

 spot at end of wing. Cilia white around the apex, more intermixed with fuscous 

 below, dark lines conspicuous; third coalescing with the second below apex. 

 Expanse 8 mm. ; .32 inch. , 



Hah. — Penna. (Hazleton). 



Bred from Betula nigra (black birch) ; one specimen a female. 



O. arbitrella n. sp.— PL IV, fig. 6.— Palpi white, third joint with a small 

 blackish dot without and within. Head sordid white, tufts dark brown, shading 

 into yellowish fuscous. Disc of thorax sordid white, sides and patagia dark 

 brown, with feeble purplish lustre; seven or eight costal strise, more distinct 

 towards the apex, outer ones reaching to middle of wing; a white spot at end of 

 cell ; first plical spot broadly triangular, not reaching the dorsal margin ; second 

 plical spot large, reaches the dorsal margin and is ill defined externally ; outer 

 part of subplical space almost entirely dark fuscous, basal portion sprinkled with 

 the same. Cilia whitish, basal portion around apex and a broad patch below the 

 latter fuscous; free margin around apex not tipped with fuscous. Expanse 8-9 

 mm.; .32-36 inch. 



Hab. — Penna. (Hazleton), 



Two specimens in my collection were bred from Vacciniwn corym- 

 bosum (swamp huckleberry). Differs from conspicuella, especially 

 by the absence of the curved dorsal line, and from the following 

 species by tlie more strongly marked costal strise. 



O. melanotella n. sp.— PI. IV, fig. 7.— Palpi sordid white, third joint 

 slightly spotted with fuscous externally. Head grayish-white, tufts fuscous, 

 intermixed with gray. Thorax sordid white. Forewings brown, with a feeble, 

 purple lustre ; seven or eight slender costal strife, approximately alike and equi- 

 distant, not reaching beyond one-third of wing breath ; a well-marked spot at 

 end of cell. Plical spots large, quadrate, the first smaller and not attaining the 

 margin, the second very large and including the dorsal margin; remainder of 

 subplical space speckled with fuscous. Expanse 7 mm. ; .28 inch. 



TRANS. AM. KNT. SOC. XXXIII. AUGUST, 1907. 



