214 NATHAN BANKS. 



The species of this section known to me are as follows : 



Trisenodes — ignita, grisea. 



My stacides— nigra, atra, punctata. 4-fasiata. 



Leptocenis — indecistis, resurgens, mentiens, dilutus, transversus, JlaveoJatus, maculatus. 



Leptocella — exqiii.nta, uwarowii, albulus, piffardii, coloradensis. 



GScetina — incerta. parvula, fumosa, Jtoridana, avara, flavida. 



Setodes — americana. 



TriseiiodeN gri!«ea n. sp.— Head ferruginous, vertex rather blackish ; 

 palpi gray; anteunfe pale yellowish, tips of joints blackish, basal joint ferru- 

 ginous, some yellow hairs on head ; thorax black, above with some yellow bail's; 

 abdomen yellowish, slightly brownish above ; legs yellowish gray, paler toward 

 tips, joints of tarsi scarcely darker at tips; wings uniform yellowish gray, 

 scantily clothed with grayish yellow hairs, with darker gray fringe on apical 

 margin of fore pair and on posterior margin of hind pair, veins paler, fore wings 

 moderately long, costal margin rounded, hind maigiu straight, discal cell closed, 

 the upper branch forked nearer to cell than to tip of wiug, the lower brancli 

 simple, terminating before tip of wing, hind wings with discal cell closed, the 

 upper branch forked nearer to tip than to the cell. Expanse 23 mm. 



Denver, Colo. (Baker, Cockerell). 



Leptocerus maculatus n. sp. — Head with a bunch of black and white 

 hairs under and one above each eye, some white bail's on middle of vertex ; palpi 

 brown and white; antennse white, distinctly annulate with black; thorax with 

 several groups of black and white hairs ; abdomen green ; legs white, tarsi all 

 annulate with black, and the anterior tibise black on outside, and intermediate 

 tibife rather blackish on outside also ; fore wings clothed with black hair, with 

 scattered white patches, most prominent on middle and basal part of wings, 

 fringe long and black, hind wings gray, with long gray fringe; antennte scarcely 

 twice as long as wings; palpi long; abdomen short and large, spurs 2-2-2, fore 

 pair short but distinct; fore wings short, rounded at the tip, discal cell about 

 length of its pedicel, first apical cell twice as long as its pedicel, the fourth apical 

 cell has a pedicel rather shorter than itself, while the third apical arises from the 

 middle of the pedicel of the fourth ; hind wings shorter and scarcely broader than 

 the fore pair, first apical cell long pedicellate, fourth apical cell short pedicellate, 

 all of the veins distinct. Expanse 15 mm. 



Washington, Di.strict of Colnmbia, August. 



I.EPTO€EIiL.A n. gen. 



Venation alike in the sexes, fore wings long and narrow, hind 

 wings very broad, veins of costal region of hind wings (before fork 

 live) are obsolete, fork five present, spurs 1-2-2 or 0-2-2, fir.st and 

 fourth apical cells of all wings are pedicellate, second and third 

 joints of palpi long, subequal, fourth smaller and rather shortei', 

 fifth still shorter. 



This genus is easily known by the obsolete veins in costal half of 

 the hind wings. 



Type L. uwarowii. 



