AMERICAN MICROLEPIDOPTEHA. 117 



triangle between the above mentioned costal and dorsal patches; outer half of 

 wiug more densely dusted with brownish fuscous. Stigmata at end of cell very 

 distinct, a short dash immediately below on the fold ; a line, not sharply defined, 

 extends obliquely from beginning of costal cilia towards middle of wing before 

 the apes, reflected thence to the dorsal margin ; apical part of wing and adjacent 

 cilia sprinkled with white scales. Hind wings and cilia grey. Abdomen above 

 mouse-grey. Under side of body silvery ; legs more or less fuscous externally. 

 Fore wings fuscous, hind wings much paler. 

 Expanse 12.-13. mm., 48.-52. inch. 



Hab.—Fsi. ; Mo. ; S. Dak. 



Markings of fore wings almost identical with ochrocoviella and 

 fuscosuffusella, from both of which it differs by the different ground 

 color of fore wings. A well-marked specimen in the National 

 Museum collection, No. 743, is without locality label. 



D. fuscosuffusella sp, n. (PI. VII, fig. 13).— Thorax, abdomen above, 

 head and antennal eye-caps pale greyish ochreous, with feeble lustre. Labial 

 palpi ochreous, dusted with fuscous, terminal joint minute, dark fuscus in the 

 male, more distinct and not darker in the female ; antennas fuscous. Fore wings 

 ochreous, with dark fuscous dusting and shadings; costa dark fuscous from the 

 base, an elongate triangular costal patch at one-third ; dorso-basal space and a 

 quadrate dorsal patch dark fuscous, the latter a triflle nearer the base than the 

 opposite costal one, both these patches shade off gradually externally ; basal 

 space limited externally by a straight line, broken and interrupted in the 

 middle, conspicuously dusted with white scales outwardly, especially before the 

 quadrate basal patch ; outer part of wiug mottled with paler and while scales, 

 especially in dorsal half of wing ; stigmata illdefined ; cilia greyish. Hind wings 

 pale greyish, tinged with fuscous, cilia greyish strartiiineous. Under side: body 

 and middle and hind legs within silvery, tinged wicii ochreous, rest more or less 

 fuscous; fore wings pale fuscous, hind wings silvery white. 



Expanse 10.-11.5 mm., .40-.46 inch. 



fia6.— Missouri (St. Louis). 



A male and female si)ecimen in my collection. 



The white dusting of fore wings less pronounced in the female. 

 Two other specimens in my collection have the outer two thirds of 

 fore wings densely dusted with dark fuscous; costo-dorsal patches 

 not defined, white scale dusting absent. However, do not feel war- 

 ranted to consider them specifically distinct. 



D. ochroeomella Clem.— Ochreous: head, eye-caps, thorax and abdomen 

 above paler. Labial palpi pale ochreous, terminal joint dusted with fuscous, not 

 depressed. Fore wings ochreous, costa and adjoining space brownish fuscous, a 

 small, semi-oval costal spot at two-fifths, and on opposite larger dorsal patch of 

 the same color; apical part of wing and adjacent cilia dusted with brownish and 

 a sprinkling of very small whitish scales; two fuscous dots at end of cell and a 

 short dash immediately below on the fold; cilia pale greyish ochreous. Hind 

 wings pale grey, washed with pale fuscous, cilia greyish stnmiineous. Under 



TKANS. AM. ENT. SOC, XXVII. OCTOBER, 1900. 



