146 



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

 what varying in 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-will f/s and cilia, cinereous gray. Under side, jjale grayish. 



Abdomen, ciuerous; nncus, short, obtuse, apex curved over in a semicircular form ; 

 lateral claspers, projecting nearly their whole length beyond the nncus, 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 ai^pears to be 

 of about equal width throughout. 



Ex^. al., 15'"™. 



Habitat, Rouge River, southern Oregon. May 7, 1872; Mendocino County, Cal., May, 

 1871. 



Types, $ 9) Mus. JVlsm. 



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 the 

 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 verj' de- 

 cidedly in form from those o^ punetiferella Wlsm. 



Incurvaria politella sp. n. 



Antenna', grayish-fuscous, pubescent in the ^ . 



Palpi, mouse-graj'. 



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



Thorax, shining, grayish. 



Fore-wings, shining, pale grayish, sometimes with a slight aeneous tinge, especially in , 

 the 9 ; the aeneous tiuge is evenly diffused over the wing-surface ; cilia gray | 

 along their base, tips whitish. 



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

 cence. 



Abdomen, j)ale 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- j 

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

 upwards. 



Legs, pale gray. j 



Fxp. ah, $ 17'"m, 9 14-15"^"\ \ 



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



Types, S 9 > -^^ws- Wlsm. 



Incurvaria humilis sp. n. 



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

 The hind-wings very slightly darker than the fore-wings, 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; a short, obtuse, straight uncus, not bent 

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

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

 a small excrescence above at their base, but are of a totally different shape from 

 those of the larger allied species. 



