92 DIPTERA OF NORTH AMERICA. 



1. T. lichtensteinii WIED. (Auss. Zweifl. II, 497, 31.) . (Tab. 

 II, fig. 25.) 



Clay-colored ; wings with the tip, a square spot on the hind border, an 

 oblique band and some dots, brown. Long. corp. 0.2. 



Front and antennser rather bright yellow, all the other parts 

 more or less honey-yellow, turning to clay color on the thorax. 

 The fuscous color of the apex of the wing extends farther along 

 the anterior than on the posterior border, and forms a little tooth 

 on the fourth longitudinal vein ; a large square fuscous spot is 

 situated on the hind border, and includes the posterior transverse 

 vein. Between this spot and the brown apex there is a triangular 

 almost hyaline space, having a very limpid drop in each corner, 

 and including a small fuscous spot on the hind border of the wing. 

 The anterior corner of the square fuscous spot is connected with 

 the stigma by an oblique fuscous band, including the small trans- 

 verse vein ; there are besides a small fuscous dot above the fifth 

 longitudinal vein, and another slightly larger below this vein, and 

 also a brown margin of the small basal transverse veins ; some 

 pure limpid drops of a rather large size are seen near the borders 

 of the larger brown spots. 



Hob. Mexico. 



Observation The bristle of the antennae is thickened near the 

 base in a striking and peculiar manner. In each of the sinuses of 

 the large hyaline spots of the wing there is a large whitish drop, 

 not a clear one, as Wiedemann states. 



2. T. scutellaris WIED. (Auss. Zweifl. II, 484, 13.) % and . 

 (Tab. II, figs. 26, 27.) 



Thorax with the lateral border spotted with black ; scutellum polished, 

 brown with a reddish stripe ; abdomen marked with blackish-brown 

 bands ; wings with brown bands and spots. Long. corp. 0.26. 



Antenna3 pale ochreous ; front Isabella-colored, with the upper 

 part gray. Middle of the thorax grayish, with two darker stripes 

 and some little dots. Scutellum polished, with the lateral borders 

 dark brown and the middle reddish. Abdomen very pale gray at 

 the base, with a fuscous band, a little interrupted in its middle ; 

 the third, fourth, and fifth abdominal segments each with a similar 

 band at the base, but more interrupted in the middle and attenuated 



