18 WILLIAM G. DIETZ, M. D. 



S EM IOTA gen. n. 



Type inammiella. 



Head as wide as long; scales appressed, occiput rough haired. 

 Second joint of labial palpi not obviously flattened, roughened with 

 scales beneath and with lateral seta?; terminal joint ascending, flat- 

 tened, obtusely pointed. Eyes rather small, but slightly visible 

 from above. Antennae setaceous, nearly as long as the forewings, 

 simple. Forewings lanceolate; 11 veins, 7 and 8 out of 9, V> fur 

 cate. Hindwings ovate-lanceolate, as wide as the forewing; cilia 

 1 ; 7 veins, vein 2 remote from angle of cell, 5 and 6 stalked, 

 1* narrowly forked at base. 



The reasons for establishing this genus have been noted under 

 Setomorpha. The three species recognized are distinguished as fol- 

 lows : 



Larger, 18.0 mm.; forewings wider; transverse lines near base extend from 



costa to dorsum operosella. 



Smaller, 10.0-15.0 mm. ; forewings elongated, pointed at apex. 



Pale ochreous; without transverse lines in apical part of wing. 



inamcenella. 

 Ochreous brown; transverse lines in apical part of wing. 



transversestrigella. 



X. operasella Zell. — Dyar's List, p. 575, No. 6549. 

 The author describes this species as follows : 



" Alis ant. oblongis. dilute luteis, fusco-nebulosis, costa fusco-punctata et pos- 

 tice-maculata. 9 • 



"Thorax pale ochreous, dusted with brown, patagia pale, brown anteriorly. 

 Ifead grayish, dusted with fuscous; antennae with close-set joints, pale brown, 

 somewhat shining; first joint brown, yellowish at the apex. Labial palpi 

 strongly flattened, pale yellowish above, second joint brown beneath, with sev- 

 eral bristles on the sides, third more than one-half longer than the preceding, 

 narrower, obtuse at apex and almost entirely pale yellowish. Femora and tro- 

 chanters of anterior legs gray, tibiae and tarsi brown, former spotted with white, 

 apices of tarsal joints paler, posterior legs sordid pale yellowish gray, tibia? rough 

 haired ; feet shining, pale gray externally, joints broadly pale at their ends. Ab- 

 domen gray above, whitish beneath, rather robust, long, acuminate with long 

 ovipositor. 



"Forewings four lines long (about 8.0 mm.); apparently widened by the 

 cilia, rounded at the apex, pale ochreous, with blackish brown dusting, the latter 

 forming a pale shading near the base and a strong though not sharply defined 

 dash on the fold before, its middle; in the middle of the disk above the outer 

 third of the fold are several confluent, longitudinal stripes; several spots on the 

 internal margin ; on the basal half of costa are eight unequal dots, on the distal 

 half six less approximate, the four last of these extend into the cilia. Cilia yel- 



