200 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



Teucliocuemis lituratus. (Plate VIII, figs. 12, 12a.) 

 Pterallasies lituratus Loew, Centiir., i7, 81. 



Teuchocnemix lituratus Osten Sacken, Bull. Buff. Soc. Nat. Sci., 58, 1876; Cat. 

 Dipt., '250. 



Habitat. — Pennsylvania, Connecticut, Missouri ! 



5,9. Length, 10 to 12'"'". Black, moderately shining. Head dilutely 

 luteous or yellow; occiput, except the margin, cinereous, opaque ; cheeks 

 black, shining. AntenntB scarcely darker than the face. Dorsum oftho- 

 rax with grayish or yellowish-gray pollen and thin obscure j'ellowish 

 pile, suboi)aque ; on each side of the middle a slender opaque black stripe, 

 abbreviated both in front and behind ; just above the wing a reddish 

 elongate spot, and the humeri also sometimes of the same color. Scu- 

 tellum luteous, the base blackish. Abdomen black, somewhat shining, 

 with short, thin, white pile. Legs black; front femora at the ends and 

 more or less below, base of their tibia% middle tibise for the larger jiart, 

 and the middle tarsi, except the tip, hind femora at base, along the under 

 sides, the tibine at base and tip, and the tarsi except the tip, light 

 yellow ; in the female the hind legs may be wholly reddish-yellow, except 

 the tip of tarsi. Wings brownish, with an elongate hyaline spot in the 

 first and second basal cells ; narrow clouds along the base of the first and 

 fifth veins. 



Two specimens. New Haven, Conn., and Missouri (Mr. Theo Pergaude). 



Tevichocnemis Bacuntius. (Plate VII, fig. 6.) 



Milesia Bacuntius Walker, List, etc., iii, o6'.\. 



Teuchocnemis Bacuntius Osteu Sacken, Bull. Buff. Soc. Nat. Sci., iii, .58; Cat. 

 Dipt., 13.5, uotes 237, 238, p. 2.50. 



Habitat. — Georgia, Texas! 



$ ,9 . Length, 12™'". Face light yellow, thinly light-yellow polliuose 

 Anteniue reddish yellow ; clieeks and occiput reddish yellow, narrowly 

 whitish ]>ollinose along the orbits. Front of female like the face; pile 

 light yellow. Dorsum of thorax black, the broad lateral margin ex- 

 tending a little inwards at each humerus, and a large triangular spot 

 in front of the scutellum, the scutellum and a large spot on the meso- 

 pleurse yellowish red ; ])ile of dorsum moderately abundant, erect, yel- 

 low. Abdomen brownish black, the lateral angles of the first segment, the 

 second, third, and fourth segments with two very large coalescent s]>ots, 

 extending from the v)osterior nearly to the anterior margin, but broadly 

 connected behind, and the fifth segment wholly reddish yellow ; in 

 some specimens the picture is not distinct, and the yellow more or less 

 broken up in brown, in part perhaps due to the effect of drying. Legs 

 reddish yellow, the base of all the tibiae pure yellow. Hind femora in 

 the male very much swollen ; in the same sex the coxje are provided 

 with an obtuse tubercle, and the tibiie on the front side, near the mid- 

 dle, have a strong projecting tubercle ; in the female the femora are 

 only a little thickened, and the tibia^ are not provided with the spine. 

 Wings strongly tinged with brownish, especially in front, a streak along 

 the first basal cell nearly liyaline ; third longitudinal vein with a rather 

 deep curvature into the first posterior cell. 



