64 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.57. 



dorsum, an irregular, ill-defined black line, making with the black 

 dash on costa a broken, inwardly angulate fascia; a faint dusting of 

 black scales near outer margin of wing; cilia pale ochreous fuscous, 

 about same color as the head scales. Hind wings as broad as fore 

 wings; very pale, semi transparent, whitish fuscous; cilia concolorous. 

 Abdomen whitish ochreous, faintly marked with black above, whitish 

 below. Legs pale grayish fuscous, heavily dusted with black; tarsi 

 banded with black. ]\Iale genitalia of type figured. Alar expanse 

 12 mm. 



Habitat. — Barton, North Dakota. (jM. S. Sudvagen.) 



Food Plant. — Acer negundo. Tlu-ee moths reared (under Hopk. 

 U. S. No. 9905/-2) from larvae tj/ing the leaves. 



Type.— Cat. No. 21807, U.S.N.M. 



An inconspicuous species of the maculimargincTla group very close 

 to nir/rimaculella Busck. It lacks the white markings on the fore 

 wings of typical specimens of that species; but as these are also absent 

 from other eastern specimens of nigrimaculella, the two species are 

 not readily distinguishable in color or markings. The shape of the 

 uncus of the male genitalia of the new species, however, is strikingly 

 different from that of any of the varieties of Busck's species and 

 readily separates the two. In negundella it is bluntly arrovv^-shaped, 

 while in nigrimaculella it is roundly oval (figs. 16-17, pi. 3). The 

 entire genital apparatus is also somewhat larger and stouter in the 

 Dakota species. 



The larva is pale yellowish white, entirely unmarked. Legs, 

 abdominal crochets, thoracic shield and other chitinized parts pale; 

 tubercles small, pale, obscure; body hairs pale. Head light lemon 

 yellow, pigmentation of ocellar area black, continuous; mouth parts 

 pale except mandibles which are brown along the margins and ante- 

 rior region of mentum which is a dark brown. Length full grown 

 larva: 12 to 12.5 mm. 



RECUBVARIA QUERCIVORELLA Chambera 



Plate 5, figs. 25-2G. 

 Recurvaria quercivorella Dyar, List N. A. Lep. No. 5602. 



A large male of this species reared from oak (Hopk, U. S. No. 

 13965.4-2). Larva collected by the writer in Hell Canyon, Manzano 

 National Forest, New Mexico, September 12, 1916. Moth issued 

 April 24, 1917. It is a very large specimen (17 mm.) for this species 

 and for this reason, as well as on account of the locality, I should 

 hesitate to include it under Chambers' name were it not for the fact 

 tliat it agrees perfectly in all characters of the male genitalia with the 

 typical eastern form. 



