THE CANADIAN ENTOMOLOGIST. 141 



lower outer surface below the usual preapical one. Wings with typical 

 neuration ; the anterior region along the veins with a distinct darkening ; 

 posterior cross-vein inclines rather toward outer part of the fourth vein ; 

 anal angle full, almost rectangular. Cilia of the yellow tegulje black. 

 Halteres yellow. 



One male taken along the Colorado River, south of Austin, Texas, 

 October 7th, 1899, by Dr. Wm. M. Wheeler. 



From allied forms the present species may be readily recognized as 

 follows : 



From cognaius by the green vertex, violet thorax, and shorter plum- 

 osity of the arista. 



From lineatus it differs in the coloration of the thorax, the sub- 

 pedunculate hypopygium and the lighter coloured lamellae. 

 7. Paraclius hybridris, n. sp. (Figs. 4, 5.) 



Male. — Length 3.75-4.25 mm., wing 3.5-4 mm. Face and palpi 

 covered with a golden-gray dust, partially shining, face rather broad. 

 Proboscis prominent, piceous, gray-dusted. Antennas red ; third joint 

 slightly longer than broad, bluntly pointed, infuscated, especially towards 

 tip ; arista tapering, moderately plumose. Front cupreous, dusted with 

 golden. Post-ocular cilia yellowish below. Dorsum of thorax and 

 scutellum bronzed, opaque-dusted. Immediately above base of wirg a 

 black spot extends forward. Abdomen bronzed, somewhat shining, gray- 

 dusted, especially towards sides. Hypopygium subsessile; lamellae small, 

 triangular, piceous except at base on dorsal side, where pubescence is also 

 lighter. The usual lamellar filament is wholly wanting. Pleura glaucous. 

 Coxfe with black hairs ; fore coxje yellow, except extreme base ; middle 

 coxae glaucous largely, and hind ones less so, on outer side. Legs reddish 

 yellow ; tarsi darkened from tip of first joint ; hind femora ciliate with 

 short black hairs below. Wings grayish-hyaline ; bend of fourth vein less 

 sharply angulate than in propinquus. Tegulae and halteres yellow ; 

 halteres with black cilia. 



Female. — Length 3-75-4. 75 mm., wing 3.25-4.25 mm. Coloration 

 as in male. 



Seven males and five females taken at Woods Holl, Mass., July 14th 

 to 27th, 1899, by Dr. Wm. M. Wheeler. 



This species was taken in the same netful with another /'a/'^fr/w and 

 a Pelastonenrns. The proportions taken were : 



