82 BULLETIN 48, UNITED STATES NATIONAL MUSEUM. 



streak. A series of blackish terniinal dots, sometimes forming a nearly 

 continuous line. Orbicular small, browu ringed and white centered, 

 often wholly wanting. Keniform narrow, upright, marked as a white 

 lunule, reduced to two white dots, or entirely wanting. So far as the 

 ornamentation is concerned the sexes are alike, except that in the uiale 

 the cleft of the primaries interrupts the course of the subterminal 

 line, this line is much more angulated below the ajiex, and the shade 

 preceding it is blackish at that point. A black spot marks the lower 

 angle of the upper lobe, and a prominent black lunule marks the inner 

 limit of the incision. Secondaries luteo-fuscous, darker in the male, 

 l^aler at the anal angle, crossed by a dark median and a i)ale subtermi- 

 nal line. There is also a narrow, sometimes interrupted black terminal 

 line, and a dusky discal luiuile, the latter often absent. Beneath, paler, 

 reddish gray, both wings with a dusky extra median and a pale sub- 

 terminal line, the latter frequently in great part obsolete. A dusky 

 discal lunule on the primaries, and a rather prominent black lunule on 

 the secondaries. 



Expanse of wings, L'-J to 25 mm. =0.1)0 to 1 inch. 



Habitat. — Canada to Texas; Central States; jS'ew York, JMay and 

 August. 



There is little variation in this species except in ground color, and 

 that is extremely slight. The most prominent ornamental feature is 

 the broad, outwardly diffuse transverse anterior line, and in the male 

 the black mark termiiuxting the incisure. On comparison a very close 

 correspondence will be noted between the markings of this species and 

 those of Heterogramma puramnsalis^ and the genera are certainly related. 



The other peculiar features of the species have been alluded to under 

 the generic heading. It is rather common in most i^ortions of its range. 



Genus DERCETIS, Grotc. 

 1878. Grote, Bull. U. S. Geol. Suiv,, IV, 186. 



Head moderate; eyes large but hardly prominent; front smooth, 

 with a distinct interautennal tuft. Ocelli distinct, situated close to the 

 compound eye and to the base of the antennse. Palpi long, projected 

 straight forward or a little oblique, practically alike in both sexes, with 

 the usual upright vestiture, the terminal joint pointing upward, the 

 vestiture coarse and somewhat imperfectly truncated at the tip, making 

 it somewhat triangular. Tongue moderate, or rather weak. Antennfe 

 moderate in length, set well u]) on the vertex and not encroaching at 

 all on the front. In the female they are simide, in the male pectinated, 

 the pectinations proportionately very stout and coarse, not extending 

 to the tip, differing quite markedly in the species and without special 

 modifications. Body moderate, abdomen conic, cylindrical, slightly or 

 not at all exceeding the anal angle of the secondaries. Legs long, 

 closely scaled, the tibne spurred as usual. In the male the fore tibia is 

 somewhat shortened, with a moderate extended process anteriorly, not 



