LIST OF DIPXERA. 493 



341. DaSYPOGON FENESrnATUS. 



Frem. Flavidus; antennm omnino P ferruginecB ; thorax vix vil- 

 tatus ; abdomen ferruginosum ; pedes flavi, femoribus sujna 

 nigris ; aim fuscanee, vitta ad basim limpidissima. 



Diisypogon fenestratus, Wied. Auss. Zweifl. i. 377, 18. | 



342. Dasypogon diffigilis. 



Flavidus; antennce iiigrte ; thorax vix vittatus ; abdomen nigri- 

 cans, incisuris fermgineis ; pedes ftaii, femoribus supra 

 nigris; alee fuscance, vitta ad basim limpidissima. 



Dasypogon difEcilis, Wied. Auss. Zweijl. i. 378, 19. 



Genus 4. PSEUDORUS. 



Antennarum avticulus 3us dilatatus, lo et 2o conjunclim fere 

 triple longior. Thoracis dorsum gibbosuin, antice porrectum. 



Pseudorus, Diptera Saundersiana, Pt. 2, 103. 



Third externd-medial vein approaching very near to the fourth 

 on the border of the wing ; subaual united to the anal at some dis- 

 tance frono the border. 



1, Pseudorus piceus. 

 Pseudorus piceus, Diptera Saundersiana, Pt. 2, 103, pi, 4, f. 5. 

 South America. 



Genus 6. BRACHYRHOPALA. 



Corpus breve, fere nudum. Mystax simplex. Proboscis por- 

 recta. Palpi breves, tenues. Antennae vix capitis longiludine, basi 

 vix villosffi ; articulus 3us lotriplo longior, supra fere rectus, subtus 

 paullo convexus, basi attenuatus. Abdomen obclavaiura. Tibia 

 anticEB calcaratSB. Alarum vense exierno-mediae 3a et 4a apud 

 marginem reraotae ; subanalis et analis valde approxiniatae, non 

 conjunctae. 

 Brachyrhopala, Macq. Dipt. Exot. Suppl. 2,35. 



