ALDRK H AND DARLFNCTON. 75 



AXORO^iT<»MA Loew. 

 A humeral and a propleiiral brii^tle ; three j^upra-alar ; one pre- 

 sutiiral ; two notopleural ; one large and one small mesopleural 

 bristle; four dorsocentral bristles ; two fronto-orbital bristles. Eyes 

 transversely ovate ; cheeks broad ; face receding, the front edge of 

 the mouth entirely obliterated (i. e. the lower part of the face is 

 not set off from the oral cavity by a sharp margin). The sixth 

 longitudinal vein extends to the margin of the wing. The distinct 

 mesopleural bristle seems to be a valuable generic character. 



TABLE OF SPECIES. 



1. With only one sternopleural bristle -• 



With three or four sternopleural bristles graiidis n. sp. 



2. Wing with a black spot covering both cross-veins opaca Coq. 



Cross-veins with separate spots ^• 



3. Thorax black in ground color, with gray dust iiiaculala n. sp. 



Thorax yellow in ground color, with yellowish dust niargiiiata Lw. 



AnoroNtoma grandis Darlington, n. sp. 



Length 7.3 mm. ; of wing, the same. 



Large, blackish species, pulvilli long and conspicuous (in the male); hind 

 femora exceptionally stout. 



Occiput and front lirownish ; a black stripe extends from the ocellar bri.stles to 

 the occiput; front densely pubescent below; cheeks straw yellow, about the 

 widtli of the eye; eyes transversely oval ; antennte brownish, third joint oval; 

 arista short, bare; face strongly receding below ; vibrissa; one on each side, close 

 together, rather delicate. 



Thorax light brown; dorsum rather densely sprinkled with dark brown dots 

 from which the small hairs arise, and with larger dark brown spots from which 

 the bristles arise; scutellum reddish-brown, bare except the ordinary four bris- 

 tles; besides the one propleural bristle a propleural hair; two bristles and a liair 

 on the posterior margin of the mesopleura, which is otherwise bare ; on the upjier 

 edge of the sternoplenra is a row of from three to four strong bristles (three on 

 one side; on the other four, two of which are a little smaller); sternopleura 

 pubescent below. 



Abdomen black, hypopygium yellow, globose. 



Wings almost hyaline; the end of the auxiliary vein and the small and large 

 cross-veins infuscated ; the cloud on the small cross-vein is preceded and follow* d 

 by whitish areas, and there is another of these on the costa beyond the end of 

 the auxiliary, also a few faint ones in the base of the wing. 



Legs yellow; front femora infuscated, middle femora comparatively sleiidei-, 

 hind ones exceptionally stout ; the la.st with a black siiot near the distal end ; all 

 the pulvilli long and conspicuous, dirty white in color. 



One male specimen. Aldricii : Pacific (irove, Cal., May 'Jth ; 

 collected in a wet mea(h)\v in the woods near the seashore al)out a 

 mile south of Pt. Pinos I^ight. 



TEANS. AM. ENT. SOC. XXXIV. MARCH. 1 90S 



