LIST OF DIPIERA. 87 



Sargus niger, Wied. Zool. Mag. iii. 52, 17 ; Auss. Zweifl. ii. 



28, 2. 

 a. Brazil. From Mr. Saunders' collection. 



Genus 29. SARGUS. 



Corpus elongatum. Facies declivis. Antennae 9-articulatee ; 

 flagellum suborbiculare ; arista setiformis, subterminalis. Scutel- 

 lum inerme. 



Musca, p., Linn. ; Scopoli ; Fabr. ; Gmel. ; Geoffr. ; Sckr. 



Nemotelus, p., Deg. 



Rhagio, p., Schr. 



Sargus, p., Fabr. ; Meig. ; Lair. ; Fall. ; Macq. ; Zett. 



Mediastinal vein ending at about half the length of the wing. 

 Subcostal ending before two-thirds of the length. Radial ending 

 beyond two-thirds of the length. First branch of the cubital ending 

 at hardly half the length from the radial to the second branch, 

 which ends at some little distance from the tip of the wing. First, 

 second, and fourth externo-medial veins complete; third not reach- 

 ing the border. Subanal united to the anal at a short distance from 

 the border. Discal veinlets forming two sides of the pentagonal dis- 

 cal areolet. Median veinlet distinct, very short. Humeral, subcostal, 

 mediastinal, radial, first cubital, second cubital, praebrachial, pohra- 

 chial, anal, axillary, subapical, discal, and two externo-medial 

 areolets complete. Two externo-medial areolets, axillary lobe, and 

 subaxillary lobe incomplete. Subapical areolet occupying the tip 

 of the wing. 



Europe. 



1. Sargus cuprarius. 



&neus ; oculi fascia purpurea ; abdomen cupreum^ postice viola- 

 ceum; pedes fusci, femoribus nigris ; a la nubecula f us ca. 



Musca cupraria, Linn. 



Sargus cuprarius, Dumeril, Cons. Gen. Lns. pi. 50, f. 8. Zett. 



Dipt. Scand. i. 157, 1. Loeiu, Lsis, 553, 1. Var. robu&tus et 



gracilis. 



a—f. England. From Mr. Stephens' collection. 



I 2 



