128 BULLETIN 132, UNITED STATES NATIONAL MUSEUM 



show, however, that it must go there. It also has the secondary 

 character, though not so prominently as confxana. The two species 

 are very close. 



Male and female genitalia figured from specimens in National 

 Collection from Plummer Island, Md. (Busck, July, male), and 

 Washington, D. C. (Busck, July, female, reared from Sassafrass). 



Distribution. — Massachusetts, Connecticut, New Jersey, Pennsyl- 

 vania, Maryland, Virginia, District of Columbia, North Carolina, 

 Florida, Arkansas, Missouri, Illinois. 



Alar expanse. — 14^-17 mm. 



Type. — In National Collection. 



Type locality. — Pennsylvania. 



Food plants. — Sassafras (also UaTnamelis according to Kear- 

 fott). 



16. Genus EXARTEMA Clemens 



(Figs. 11, 14, 18, 42, 204) 



Exartema Clemens, Proc. Acad. Nat. Sci. Philadelphia, 18G0, p. 356. 

 Genotype. — Exartema nitidana Clemen.s (North America.) 



Thorax with posterior tuft. 



Fore wing smooth; termen convex; 12 veins; all separate; 7 to 

 termen; 8 and 9 approximate at base; upper internal vein of cell 

 from between 10-11 ; 3, 4, and 5 not approximate at termen ; 2 from 

 cell at or beyond % but before %, straight or very slightly bent. 



Hind wing with 8 veins; 6 and 7 approximate toward base; 3 

 and 4 connate; 5 approximate to 4 at base; in male with termen 

 more or less notched at veins 5, Ic and 16 and with inner margin 

 developed into an extended lobe (fig. 18). 



Hind tibia of male with long hair pencile from base. 



Male genitalia with harpe elongate and with a row of flat, thin, 

 hair-like spines along outer surface; cucuUus elongate, narrow, 

 densely sj^ined; a cluster of extra heavy spines at base of cucuUus 

 (xS'^c^); sacculus extended in an arch over and pocketing neck; 

 spine cluster {Spc'-) always present and frequently upon a finger- 

 like process (digitus) projecting from the neck; spines at base of 

 sacculus short and weak. Uncus developed; weakly chitinized; tip 

 weakly spined. Socii developed; oval; broad; hairy and flexible. 

 Gnathos normal, a simple band with Aveakly chitinized subanal 

 plate. Aedoeagus short or only moderately long; straight or very 

 slightly curved; cornuti normally absent, sometimes one, two, or 

 three short rather weak ones present. 



Female genitalia witli signum present or absent; if present a single 

 small, weak, scobinate patch. Doctus bursae moderately long; un- 

 chitinized except near genital opening. 



