1915] Aldrich — New American Species of Asteia ani Sigalosssa 97 



row of minute hairs; notopleurals 2; scutellars two pairs, the inner larger; post- 

 alar 1; intra-alar 1 small behind; sternopleural 2. 



Abdomen (shriveled) black with yellow markings, of which the most evident are 

 on the first and fourth segments, in the form of more or less distinct crossbands; 

 fifth segment shining black. 



Legs pale yellow, slender. 



Wings hyaline, venation as figured. 



Length, 1.6 mm.; of wing, 2.4 mm. 



9 . Face even more excavated, yellow with black mouth margin; segments 1, 2 

 and 3 of abdomen broadly black above, the rest whitish; hairs of abdomen quite 

 long. 



Length, 2 mm.; of wing, 2.8 mm. 



One male, two females, collected on window in the large sawmill 

 of the Potlatch Lumber Company at Potlatch, Latah County, Ida., 

 on September 6, 1912. 



Sigaloessa hirta sp. nov. 



9 . Yellow, the mesonotmn except borders, the vertex and occiput, a spot on 

 halteres, and a stripe on lower part of mesopleura, black. 



Vertex including ocellar triangle black, front rather pure yellow, wider than one 

 eye, covered with comparatively coarse black hairs; two small fronto-orbitals on 

 each side high up, close to the orbit, leaning outward and a little backward; post- 

 verticals and oceUars distinct, the former divergent; two pairs of verticals of good 

 size; antermse partly concealed by the overhang of the front and the excavation of 

 the face, moderately large, yellow, third joint round, brown on outer and apical 

 part, arista long, with minute pubescence; face wide, entirely yellow; proboscis, 

 palpi, bucca and posterior orbit yellow; the hind edge of bucca on each side bears 

 half a dozen noticeable small bristles, from these a row of hairs extends forward end- 

 ing in a distinct \'ibrissa. 



Mesonotum shining black with a yellow lateral border including the humeri and 

 extending to the corner of the scutellum; pleura yellow except the stripe noted 

 above; scutellum yellow; metanotum dark brown; halteres yellow with large black 

 spot on outer side of the knob; hairs and bristles quite strongly developed. There 

 are two dorsocentrals on each side, with a row of strong hairs extending forward 

 from them, acrostichals in a single row; notopleurals 2; post-alar 1; humeral 1 

 small; sternopleural 2; scutellars two pairs, the inner large and divergent. 



Abdomen yellow, gradually blackish toward apex, extreme tip light yellow. 



Legs yellow, slender. 



Wings hyaline, venation as in lineata. 



Length, 2.1 mm.; of wing, 2.6 mm. 



Described from a single female, taken September 9, 1912, on a 

 ^andow in the sawmill at Potlatch, Ida., where I captured the 

 type materia] of lineata and many other rare Diptera. 



