274 



LIST OF DIPTERA. 



Europe. 



1. SlLVIUS VlTULI. 



Ferruginem; antenna apice nigra ; abdomen fuscum, segmentorum 

 marginibus ferrugineis ; pedes flavi ; ala limpida. 

 Tabanus Vituli, Fabr. 



The second branch of the cubital vein is straight in the male, 

 curved and approaching the first externo-medial vein in the female! 



North America. 



2. SlLVIUS ISABELLINUS. 



Late isabellinus ; frons dilute glaucescens ; abdomen incisuris 

 albidis ; ala limpidissima. 



Silvius isabellinus, Wied. 



South America. 



A. Corpus ferrugineum. - Vulpes, Wied. 



B. Corpus fuscum. - - - . , - Esenbeckii, Wied. 



C. Corpus nigrum m Silveirii, Macq. 



3. Silvius Vulpes. 



Ferrugineus ; tibia postica nigro pilosa ; ala saturate flavido- 

 fuscana. 



Silvius Vulpes, Wied. Auss. Zweifl. i. Ill, 1. 

 Brazil. 



4. Silvius Esenbeckii. 



Fuscus ; antenna nigro-fusca, non dentata ; abdomen niveo fas- 

 ciatum ; pedes nigri ; ala basiflavida, apice fusca. 



Silvius Esenbeckii, Wied. Auss. Zweifl. ii. 622, 19. 

 Brazil. 



