600 list of diptera. 



'2. Cabasa Venno. 

 Dasypogon Venno, Cat of Diptera, Pt. 2, 359. 



Genus 10. SENOBASIS. 



Antennae arista brevi. Oculi remoti. Abdomen petiolatuni. 

 Altc areola mediastinali aperta. 



Seuobasis, Macq. Dipt. Exot. i. 2, 52, 9. 



Third externo-medial vein united to the fourth, and subanal 

 vein united to the anal, at some distance from the border. 



1. SeNOBASIS ANALIS. 



Mas. Nigra ; antennm basi testacecB ; thoracis latera fulvo vit- 

 tata ; abdomen fulvum, apice nigrum; pedes fulvi"; alee 

 flamda., apice fuscce. 



Senobasis analis, Macq. Dipt. E.vot. i. 2, 53, 1, pi. 5, f. 1. 

 Brazil. 



* 



2. Senobasis fenestrata. 



Foem. Nigra ; thoracis latera, scutellum, abdomen basi, pedtsque 

 fulva; alafuscce. 



Senobasis fenestrata, Macq. Dipt. Exot. i. 2, 53, 2. 

 Brazil. 



Genus 11. PLESIOMMA. 



Antennae breves. Oculi fere contigui. Abdomen peliohituni. 

 Aiae areola mediastinali aperta. 



Plesiomma, Macq. Dipt. Exot. i. 2, 54, 10. 



Third extenio-niedial vein much inclined to the fourth, and 

 approachinp; near to it on the border; subanal united to the anal 

 verv near the border. 



