Sept. 1899.] DoANE: Descriptions of New Trypetid^. 183 



Habitat : Washington. 



A single specimen in which the abdomen is missing, but the red- 

 dish pile of the thorax, the yellow on the posterior margin of the scu- 

 tellum and the characteristic markings of the wings make it easily 

 recognizable. 



Aciura nigricornis, sp. nov. (PI. Ill, Fig. 7). 



Wholly reddish yellow ; front broad, the lateral portions remarkably produced, 

 each side bearing three large spines and two bristles ; the anterior pair of spines is the 

 largest and more curved ; the posterior pair shortest and straight ; a single pair of the 

 black vertical bristles very long and stout ; face somewhat flattened and receding ; 

 oral opening large ; proboscis and palpi short but prominent ; antennas reaching about 

 to the middle of the face ; third joint rounded ; arista black, yellowish toward base ; 

 thorax with short black pile and black bristles, with a small black spot just above the 

 base of the wings ; the broad somewhat tumid scutellum with two strong black 

 bristles ; legs wholly reddish yellow ; front femora slightly incrassated and with a few 

 weak bristles below. Wings rather broad, rounded, dark brown ; the extreme base, 

 the axillary corner and the following spots whitish hyaline : one in the costal cell ex- 

 tending from the costa to the third vein ; two just beyond the tip of the first vein, the 

 first extending posteriorly a little more than half way across the sub-marginal cell, the 

 second reaching entirely across this cell ; a large somewhat triangular incision in the 

 second posterior cell and a much narrower one in the third posterior cell ; a round 

 spot in the first posterior cell in front of the posterior cross-vein ; another in the discal 

 cell almost behind the anterior cross-vein and another in the first basal cell below the 

 stigma. The hyaline in the axillary corner extends into the third posterior cell and 

 reaches the fifth vein at one point ; first and third veins with bristles. 



Habitat: Pennsylvania. 



I possess only a single specimen of this interesting species and un- 

 fortunately the abdomen is missing. The picture of the wings and the 

 two bristled scutellum show a close relation to the genus Aciura, but 

 the larger size, the broader wing and the remarkably developed front 

 with its strong spines and bristles would seem to furnish sufficient 

 character for the erection of a new genus. This, however, I hesitate 

 to do until I have examined more specimens. 



Acrotsenia otopappi, sp. nov. (PI. Ill, Fig. 8). 



9 . Yellowish ; with very thick white pile ; head whitish yellow ; front with a 

 brownish tinge ; a single pair of frontal bristles white, others brownish ; face whitish, 

 deeply excavated ; oral openings not very large, margins but slightly projecting ; pro- 

 boscis and palpi short ; antennse darker yellow ; third joint rounded ; arista brown ; 

 the black on the drosum of thorax almost wholly concealed by the very thick white 

 pollen and the short pile ; with three indistinct brownish lines ; scutellum yellow with 

 four brown bristles ; metanotuni black with thick white pollen ; legs wholly light yel- 

 low ; abdomen blackish ; the posterior margin of each segment and an intenupted 



