SOUTH AMERICAN DIPTERA. 291 



wings, by the shorter, more broadly oval, distal portion of the ab- 

 domen, which in all the specimens forms a strong angle with the 

 second segment, directed downwards, etc. 



Dedicated to the dipterologist, Mr. F. R. v. d. Wulp, of Hague, 

 Holland. 



94. Ceria Bigotii n. sp. 



% 9 • — Length 10 — 11 mm. Closely allied to C. barbipes, but is smaller, the 

 style of autenna' is shorter, the abdomen is much more contracted on the second 

 segment, and less expanded distally, the distal portion is more shining and not 

 noticeably with pubescent, and the male wholly lacks the brush of hairs on the 

 middle tibife. 



Two specimens, Chapada. The simple middle tibife will at once 

 distinguish the male of this species from that of C. barbipes. In the 

 female of C. barbipes the second segment of the abdomen has three 

 sides straight and of nearly equal width, with a short cylindrical 

 stem ; in C. Bigoiii the cylindrical portion forms nearly half the 

 length of the segment, and its posterior side is distinctly less in width 

 than that of the nest segment. The antennal styles in the female 

 do not differ much. The legs in my specimens are deeply tinged 

 with red. 



Dedicated to Mr. J. F. M. Bigot, of Paris. 



Additions to the Caialogne of South American Syrphidce, 

 Trans. Amer. Ent. Soc. xiii, 308-324. 



Microdon cyaiieus Perty, Delectus, etc. — Brazil. 



fiilgeiis Wiedemann, Auss- Zw. Ins. ii. 82; Williston, Synopsis N. A. Syr- 

 phida?, 11; Macquart, Dipt. Exot. ler Suppl. 122. — N. and S. America. 

 Syrphiis albitarsi, e.i:cavatus, albiveiitris Rondani, Dipt. Osculati 

 — S. America. 

 octogiittatus Jaennicke, Neue Exot. Dipt. 90. — Chili. 

 similis Blanchard, Gay's Hist. fis. y pol. de Chile, vii. 410 ; Philippi, Verb. 



Zool. Bot. Gesellsch. xv. 745. — S. America. 

 alboinaciilatus Smith, Proc. Zool. Soc. Loud. 1877, 84. — Galapagos. 



a$2;oiiis Walker, List, etc., iii. 538. — Galapagos. 

 spleiirteiis Thomson, Eugenics Resa, 501. — Galapagos. 

 Teniuocera nietalloriiin, fiilvoliicus, Walker, Dipt. Saunders, 252. — 

 Brazil. 



