146 , 



Fore-tvings, pale, straw-yellow, with from 18 to 20 small chocolate-brown spots, some- 

 what varying iu size, number, and distribution; not arranged in rows, except in 

 so far as those on the outer half of the wing have a tendency to exhibit two 

 oblique lines running parallel to the apical margin ; the base of the costa tinged 

 with chocolate-brown. Under side, brownish with pale cilia. 



Head-wings and cilia, cinereous gray. Under side, jjale grayish. 



Abdomen, cinerons; uncus, sliort, obtuse, apex curved over in a semicircular form; 

 lateral clasj^ers, projecting nearly their whole length beyond the uncus, elongate, 

 upturned, the upper angle of the posterior margin turned inwards, the margin 

 itself rather oblique, with a sharp, short, projecting point at its lower angle ; 

 towards the base, the whole lower edge of the claspers is turned under and in- 

 wards almost at right angles with its outer surface, which itself appears to be 

 of about equal width throughout. 



Exp. aL, 15™"^. 



HaMtat, Rouge EiA'^er, southern Oregon, May 7, 1872 ; Mendocino County, Cal., May, 

 1871. 



Types, $ 9, Mus. WIsm. 



Incurvaria solenobiella Wlsm. 



Abdomen, uncus short and obtuse ; lateral claspers bulged on their outer sides, up- 

 turned posteriorly and pointed inwards at the apex ; they are much wider in thej 

 middle than at the ends; the line of their lower edge is somewhat undulating, 

 with a faint indication of a projecting point posteriorly. They differ very de- 

 cidedly in form from those oi punetiferella Wlsm. 



Incurvaria politella sp. n. 



Antennw, grayish-fuscous, pubescent in the ^ . 



Palpi, mouse-gray. 



Head, mouse-gray, sometimes paler towards the thorax. 



Thorax, shining, grayish. 



Fore-xvings, shining, pale grayish, sometimes with a slight neneous tinge, especially in 

 the 9; the seneous tinge is evenly diffused over the wing-surface; cilia gray 

 along their bas3, tips whitish. 



Hind-wings, gray, rather darker than the fore-wings, with a slight purplish irides- 

 cence. 



Abdomen, -pale grayish-fuscous; uncus, short and obtuse; lateral claspers elongate, 

 wider at the base than apex, with a small projecting excrescence at their upper 

 edge, close to the base, and a well-developed tooth projecting inwards from half- 

 way along their lower edge ; the posterior ends are rounded and somewhat turned 

 upwards. 



Legs, pale gray. 



Exp. al., ^ 17™'", 9 14-15 



Habitat, The Dalles, Oregon, April 21, 1872, and Rouge River. Oregon, May 7, 1872 



Types, $ 9 , Mns. Wlsm. 



Incurvaria humilis sp. n. 



This is a small, inconspicuous, unicolorous species, of a uniform grayish-brown color. 



The hind-wings very slightly darker than the foro-wiiigs, owing to an excess of the 

 gray tinge. The legs are scarcely paler. The abdomen is of the same color as the 

 fore-wings. The genital organs are peculiar; ashort, obtuse, straight uncus, not bent 

 over, is overshadowed by the strongly upturned lateral claspers, which have the ap- 

 pearance of hooks on either side; they have a slight tooth-like projection below, and 

 a Hinall excresccuice above at their base, but arc of a totallj^ different shape from 

 those of the larger allied species. 



I 



vmni 



