1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 471 



liue gemiaate, indistinct, interrupted. T. a. line upright, hardly trace- 

 able. T. p. line single, black, strongly dentate, its coarse, as a whole, 

 nearly parallel with outer margin. S. t. line whitish, interrupted, its 

 course, as a whole, nearly parallel with outer margin; a prominent W 

 mark on veins 3 and 4. A row of distinct terminal lunules. In the sub- 

 basal space, iuferiorly, is a faint greenish tint, resembling that of C. occi- 

 dental but much less marked. Claviform outlined, concolorous. Orbicu- 

 lar barely outlined, concolorous, its outer margin touching the t. a. line. 

 Eeniform moderate in size, white, with a central, dark lunule which has 

 the margins irregular, interrupting the white in every direction. S. t. 

 space paler than balance of wing, strigate and irrorate, with ground 

 color; darkest at costa. Terminal space outwardly pale powdered. 

 Head and thorax concolorous with primaries. Secondaries smoky, fus- 

 cous, outwardly darker. Beneath dark gray, powdery, with incomplete 

 extra discal line and distinct discal spot. Expands 1.70 inches (43™™). 



Habitat. — Kittery Point, Maine. 



The type is a perfect $ in Mr. Thaxter's collection. It is passing 

 strange that this peculiar genus should have only two representatives 

 in this country in such widely separated localities. 



UIjOLONCHB Smith, geu. uov. 



Eyes hairy, tibia not spinose or in any way armed. Thorax plump, 

 stout, rather densely clothed with hairy or mixed vestiture, forming a 

 more or less obvious divided anterior crest, and distinct posterior tuft. 

 Abdomen rather elongate, slender, untufted. Head more or less evi- 

 dently retracted ; i^alpi well developed and reaching middle of front. 

 Primaries rather small, short, trigonate, with marked apices and ob- 

 lique outer margin. The $ genitalia in all the species are practically 

 alike, difiering only in minor details. The side piece is narrow, slender, 

 elongate, subequal, terminating in an obliquely-rounded tip, which is 

 inwardly furnished with long spinules. The clasper is long, slender, 

 and curved, nearly equal throughout, and obtuse at tip. The $ an- 

 tennas are simple. 



The species referred to this genus are Mamestra niveiguttafaGrt., 

 Twniocampa modesta Morr., and a new species, U.fasciata Smith. The 

 genus differs from Mamestra by elongate, untufted abdomen, and from 

 both Mamestra and Twniocampa in the short, rather broad, trigonate 

 wings, and from the latter in coarser frontal vestiture. The genital 

 structure also is peculiar, and is not paralleled in any other genus. 



U. fasciata Smitli, sp. nov. 



Primaries gray ; in basal and s. t. space with fuscous powderings ; in 

 median space even, with a bluish tint ; terminal space darker. T. a. 

 liue geminate, brown ; straight from costa to submedian interspace, 

 then with a long inward, followed by an equally long outward, tooth. 

 T. p. line geminate, even, outwardly bent over reniform, then evenly 



