66 WILLISl'ON: NEW DIPTERA. 



pile of the terminal segments longer, black. A\'ings nearly uniformly 

 dark brown, the cells posteriorly a little lighter colored. 



Length, 7-8 mm. 



Four specimens, California. 



Eclimus lotus, n. sp. 



Male, ^^ertical triangle, face and basal joints of the antennae with 

 black pile; occiput with yellowish white, the mentum with white pile. 

 First joint of the antennae a little shorter than the third. Mesonotum 

 opaque, with erect, dusky white hair and more recumbent, bright 

 yellow, somewhat curly tomentum or pile. Scutelliim with long 

 blackish hair and shorter yellow tomentum. Pleurae and pectus 

 densely white pollinose and with white pile. Halteres yellow, the 

 knob brown. Abdomen deep o])uque velvety black, with longer white 

 and blackish hair, and short, curly, bright yellow pile. Wings 

 brownish, deeper along the costa; costa finely denticulate. Dorsum 

 of thorax muricate. 



Length, 12 mm. 



One specimen. California. 



Eclimus auratus, n sp. 



Female. Front shining, clothed with black hair antl shorter, bright 

 yellow pile; on the lower part, and the sides of the narrow face, when 

 seen from the side, silvery. The rather broad third joint of the 

 antennae as long as the first two together. Occij)ut with bright 

 yellow, the mentum witli white pile. Mesonotum and scutellum 

 shining, clothed with bright yellow hair and pile. Pleurae and coxae 

 densely white pollinose, and with white hair. Abdomen moderately 

 shining, clothed with recumbent, bright jellow pile, intermixed with 

 black on the distal segments. ^Vings nearly uniformly brown. 



Length, 9-10 mm. 



Two specimens, Washington. 



Cyrtopogon dasyllis, n sp. 



Male. l^>lack, thickly pilose; pile of face wholly black. Abdomen, 

 except the tip, with long, dense, erect, yellow pile. Tarsi red. 

 Wings hyaline; just before the tip a large, deep brown spot. Face 

 and front with long and dense, deep black pile; beard black. First 

 two joints of the antennae black, the third red; style short and 

 thick. Thorax black, thickly black-pilose; dorsum deep opaque 

 brown, on the sides narrowly, and behind, shining. Scutellum thickly 

 black pilose, sub-shining, convex. Abdomen nearly parallel on the 

 sides, shining, but its shape and color largely concealed by the long, 

 erect, yellow pile; the first segment sparingly black pilose on the 



