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 teguU^ 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 cog?iatus by the green vertex, violet thorax, and shorter plum- 

 osity of the arista. 



From /meahis it differs in the coloration of the thorax, the sub- 

 pedunculate hypopygium and the lighter coloured lamellae. 

 7. Paradius hybridus, n. sp. (Figs. 4, 5.) 



J/a/^.—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. Antenna; 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 wing 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. 

 Cox* with black hairs ; fore coxk yellow, except extreme base ; middle 

 coxas 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. Tegulse and halteres yellow; 

 halteres with black cilia. 



^ i^mrt/^.— Length 3. 7 5-+ 7 5 mm., wing 3.25-4.25 mm. Coloration 

 as in male. 



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

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



This species was taken in the same netful with another Paradius and 

 a Pdastoiieurus. The proportions taken were r 



