LIST OF DIPTERA. 639 



Asilus melanacrus, Wied. Auss. Ziveifl. i. 472, 72. 

 Brazil. 



69. Erax senilis. 



Cinerascens ; thorax vittis fuscis ; abdomen nigricans, incisuris 

 lateribusque late albis ; pedes nigri ; alee limpidce. Mas. — 

 Abdomen apice argenteum. 



Asilus senilis, Wied. 



Monte Video. 



70. Erax flavidus. 



Foem. Pallide flavidus ; antenna nigrce ; thorax fusco vittatus ; 

 abdomen utrinque albidum ; pedes fusci, tibiis flavescentibus 

 apice fuscis ; aim limpidce, vix fluvescentes. 



Asilus flavidus, Wied. Auss. Zweifi. i. 473, 74. 



Brazil. 



71. Erax hyalipennis. 



Mas. Ater ; abdominis segmenta duo apicalia argentea ; alee 

 hyaline?., venae cubital is f urea antica ramulum non rejiciens. 



Erax hyalipennis, Macq. Dipt. Exot. i. 2, 114, 17. 



Brazil. 



72. Erax parvus. 



Foem. Obscure cinereus, mystace antennisque nigris; thorax vittis 

 duabus dorsalibus maculisque lateralibus nigris ,• abdomen 

 nigrum, segmentis cano late fasciatis, triente apicali sty lata ; 

 pedes nigri, femoribus apice tibiisque fulvis ; alee iyalinee, 

 vix subcinereee ; halteres testacei. 



Dark cinereous. Head and pectus hoary. Head clothed be- 

 neath with white hairs. Face very convex. Mystax not thick, 

 with black bristles, and towards the mouth with whitish bristles. 

 Third joint of the antenna? long, conical, a little shorter than 

 the first; arista nearly thrice the length of the third joint. Thorax 

 and base of the abdomen with a few bristles on each side. Thorax 

 with two black dorsal stripes and with six lateral black spots. Ab- 

 demen with a broad hoary band on the hind border of each segment ; 

 apical third part stylate. Legs black, stout, spinose, slightly hairy ; 

 tibiae and tips of the femora tawny. Length of the body 6 lines; of 

 the wings 8 lines. 



a, b. Sautarem, Brazil. From Mr. Bates' collection. 



PART III. 3 K 



