140 INSECUTOR INSCITI^ MENSTRUUS 



black pile. Wings faintly smoky ; squamae white ; halteres 

 brownish. Length 12 mm.; wing 8.5 mm. 



Type.— Cat. No. 25369, U. S. Nat. Mus. 



One specimen, Moore's Lake, Idaho, July 10, 1907 (J. M. 

 Aldrich). 



Chilosia julietta, new species. 



Female. — Fairly large species with rather long dense pile on 

 thorax ; eyes pilose, face protruding downward, bare ; thorax 

 dark aeneous with brownish pile; abdomen dark aeneous on 

 sides, rather inclined to be broadly opaque black in middle ; 

 pile on frons and eyes lutescent to brown; antennae fairly 

 large, reddish brown; third joint quadrate; arista brown, 

 shorter than width of frons. Face shining black, pale pubescent 

 on mouth slopes. Thorax dark aeneous with brownish pile. 

 Femora black with brownish apices; tibiae yellowish basally, 

 darkened on apical half ; tarsi darkened. Abdominal pile luteous 

 to brownish. Wings smoky ; squamae faintly yellowish, halteres 

 reddish yellow. Length 10.5 mm. ; wing 8 mm. 



Type.— Cat. No. 25370, U. S. Nat. Mus. 



One specimen collected at Julietta, Idaho, May 3, 1901 

 (J. M. Aldrich). 



Chilosia orilliaensis Curran. 



Male. — Medium sized species, shining black. Eyes hairy, 

 face bare, blackish pilose with thoracic bristles. Head broadly 

 oval, almost circular in outline; antennae medium, brownish; 

 arista black, slender, longer than frons ; face very slightly con- 

 cave between antennae and the very inconspicuous tubercle. 

 Epistoma but slightly produced. Femora black with brownish 

 apices; tibiae brown with broad medium black bands; tarsi 

 darkened. Second and third tergites broadly opaque. Basal 

 corners of the tergites aeneous with luteous pile, posterior 

 corners black with black pile. Wings smoky; squamae faintly 

 brown, with brown cilia, halteres brown. Length 9.5 mm. ; 

 wing 8 mm. 



Female. — Pile entirely pale, short on mesonotum, fairly long 

 on pleurae. Antennae reddish yellow, normal in size, third 



