ADDENDA. 503 



This g;enus is very nearly allied to Dasi/poynn, and especially 

 to the group Microstylmn. 



1. Phelhis glaucus. 



Phellus glaucus, Diptera Saunderfiiana, Pt. 2, 110, pi. 4, f. 6. 

 a, h. Swan River. From Dr. Bacon's collection. 



Page 424. 

 Dasypogon trifasciatub. 

 a. United States? From Mr. Saunders' collection. 



Page 428. 



Dasypogon ? cepphicus. 



Nigra ; fades argentea ; arista biarticulatce. 



Dasypogon cepphicus, Say, Journ. Acad. Nat. Sci. Philad. vi. 158. 

 Mexico. 



Dasypogon nitidus. 



Luteiis. nigro vitlatus ; abdomen utrinqne albidum ; pedes nigro- 

 fusci, femuribus ba.<ii jiavescentibus ; alee infumatce. 



Dasypogon nitidus, Wied. Auss. Zweijl. ii. 643, 60. 

 Mexico. 



Page 432. 



Dasypogon rufiventris. 



Var. ? Nigra ; fades testacea ; abdomen rufum, basi inaculisgue 

 dorsalibus nigricantibus, femora anteriora obscure rufa ; 

 femora tibiaque pnstica rufa., apice nigra; aim cinerece, venis 

 nigris basi et apud cos tarn fulvis. 



Body stout, thinly pubescent, nearly bare. Face slightly con- 

 vex towards the epistoma. Mystax with a few hairs and bristles. 



