AMERICAN DIPTERA. 229 



Soc, XXXIII, pages 274 and 275, describes two other species, 

 without specific names, which he beheves to be new, but 

 which present considerable variation; these should be taken 

 into consideration before other species are created. 



Laplii.sta tlavipes. 



Laphystia flavipes Coquillett, Proc. Ent. Soc. Wash., VI, 180, 



July, 1904. 

 Laphystia flavipes Hermann, Beitrag zur Kenntnis der Asiliden 

 (IV), Dipt., Berl. Ent. Zeit.. LIII, 152, 1908. Quotes 

 orig. description. 

 9. — "Length nearly 10 mm. — Black, the halteres and femora and 

 tibiae, except their apices, yellow, the hairs and bristles whitish; sec- 

 ond segment of the antennae about two-thirds as long as the first, the 

 third as long as the first two taken together, rather slender, gradually 

 tapering to the apex, the second segment of the style wider than the 

 first, only slightly longer than wide; head and body densely gray 

 pruinose, somewhat yellowish on the face, front and mesonotum, the 

 broad front portion of the abdominal segments 2-6, except on the 

 sides and the narrow hind margins of the first five segments, polished; 

 wings hyaline, the axiliary, first vein and bases of the others yellow, 

 remainder of the latter brown." 



Type. — U. S. N. M., Cat. No. 7950. Two male specimens. 

 Habitat. — Montana and North Carolina (H. K. Morrison). 



Laphystia liiuatula. 



Laphystia limatula Coquillett, Proc. Ent. Soc. Wash., VI, 180, 



July, 1904. 

 Laphystia limatula Hermann, Berl. Ent. Zeit., LIII, 152, 1908. 

 Quotes orig. descrip. 

 (^. — "Length nearly 10 mm. — Differs ir ova flavipes as follows: Sec- 

 ond segment of the antennse nearly as long as the first, the third robust, 

 of nearly an equal width; mesonotum not gray pruinose, except along 

 the lateral and posterior margins, that on the abdomen very thin, 

 broad posterior margins of the last five segments reddish-yellow." 



Type.—\]. S. N. M., Cat. No. 7951. 



Habitat. — La Luz, New Mexico (C. H. T. Townsend). 



In appearance linatula and flavipes are very much alike. 



Laphystia opaca (PI. IV, fig. 1; PI. V. fig. 6.) 



Laphystia opaca Coquillett, Proc. Ent. Soc. Wash., VI, 180, 



July, 1904. 

 Laphystia opaca Hermann, Berl. Ent. Zeit, LIII, 152, 1908. 

 Quotes orig. descrip. 

 ^. — "Length 8 mm. — Black, the halteres, bases of tibiae and of the 



TR.A.NS. AM. ENT. SOC, XXXV. JUNE, 1909. 



