ART. 12 



KEYS TO SAPROMYZIDAE MALLOCH AND McATEE. 7 



S. Abdomen without distinct blacli markings on tergites 53 



\bdomen with either round spots or blaclJ vittae on apices of tergites— 10 



9 Costa brown from near base to apex jucunda Loew. 



Costal cell and a space beyond apex of first vein hyaline — arcuata Fallen. 

 10 Abdominal tergites with conspicuous black spots near apices from which 



the bristles arise ; propleural bristles absent superba Loew. 



Abdominal tergites with the posterior margins narrowly and the sides 

 broadly black; propleural bristle present similis Johnson. 



LIST OF SPECIES OF THE DISTRICT OF COLUMBIA REGION. 



P. svperha Loew.— A handsome fly which is fairly numerous in 

 clamp shady localities of the Piedmont region ; it has been collected 

 from June 8 to October 28 ; and is known to come to light. P. I. 



DESCRIPTIONS OF T^SVO WESTERN SPECIES. 



The two following new species have the head, scutellum, abdomen 

 and legs yellowish testaceous, and the thorax black with dense gray 

 pruinescence. In cJaripennis the humeri are also gray, while in 

 iaihusta they are yellowish testaceous. 



PALLOPTERA CLARIPENNIS Malloch, new species. 



j/rt7^._Distinguished from all other species of the genus by the 

 entii-ely clear wings. Structurally similar to ustulata. 



Length, 3.25 mm. 



Type.— V2i\o Alto, California, August 3, 1895, Lot. 84, (Type Cat. 

 No. 26387, U.S.N.M.) 



PALLOPTERA SUBUSTA Malloch, new species. 



.¥aZe.— Differs from usta Meigen in having the fuscous markings 

 of wings smaller, the one at apex of wing being much less distinct, 

 that on outer cross-vein not extending behind fifth vein, and the 

 inf uscation in subcostal cell not extending beyond the veins boundmg 

 the cell. The abdomen is pale yellowish testaceous, not black. 



Length, 4-5 mm. 



Type and one paratype.—V'^\o Alto, California, August 3, 1895; 

 one paratype, Stanford University, California, September 30, 1901. 

 iType Cat. No. 26388, U.S.N.M.) 



Family SAPROMYZIDAE. \ 



KEY TO GENERA. 



1. Basal antennal segment elongated, as long as or almost as long as the 

 elongated second segment, with some minute setulose hairs at apes below ; 

 third segment much more than four times as long as wide, appearing 

 cylindrical; face convex " 



Basal antennal segment short, not as long as second, bare at apex below_ 4 



