STMTTA. — SPILOMTIA. 



73 



SYRITTA. 



Syritta, St.-Eargeau & Serville, Encycl. Method. x. p. 808 (1825). 

 Coprina, Zetterstedt, Ins. Lapp. p. 584 (1840). 

 Planes, Rondani, Archiv. per la Zool. iii. p. 9 (1864). 



l. Syritta vagans. 



Xylota vagans, Wiedem. Aussereur. zweifl. Ins. ii. p. 101 l . 

 Planes vagans, Rond. Archiv. per la Zool. iii. p. 9 \ 



Syritta americana, Schiner, Reise der Novara, Diptera, p.367 3 ; Willist. Trans. Arn. Ent. Soc. xv. 

 p. 285 4 . 



Syritta mexicana, Bigot, Ann. Soc. Ent, k\\ 1883, p. 539 5 . 



Hab. Mexico 5 , Atoyac in Vera Cruz (H. H Smith) ; Costa Rica, Cache (Eogers). 

 — South America 3 , Brazil 1 4 . 



Four specimens, agreeihg closely with those froru Brazil mentioned by me in the 

 above-cited paper 4 . Bigots description applies well. 



CERIOGASTER. 

 Ceriogaster, Williston, Trans. Ani. Ent. Soc. xv. p. 285 (1888). 



The generic clescription given by me will only require some minor modifications to 

 include the Mexican species described below. In C. auricaudata the face is obtusely 

 carinate, nearly straight in profile ; the scutellum is small, but not thinned ; the hind 

 femora are only a little thickened ; ancl the front tarsi are but feebly dilated. 



l. Ceriogaster auricaudata, sp. n., s 2 . (Tab. II. figg. 10, 2 ; 10 a, head.) 



Face and cheeks shining hlack,the forraerwith a lateral, oblique, yellowish-pollinose stripe. Frontal triangle 

 yellowish-grey-pollinose on its margins, shining black in its middle • front of the female opaque black, 

 shining below. Antenna? brownish-red $ third joint trapezoidal in shape. Thorax opaque brownish- 

 black ; along the suture on each side a narrow opaque velvety-black spot ; pile very short, yellowish. 

 Abdomen : first segment deep opaque velvety-black, shining on the sides, narrowly fringed with yellow 

 pile behind; second segment with a narrow band in front, and a large triangle posteriorly, opaque black, 

 the sides, and in front of the triangle, shining metallic, the posterior margin with a narrow fringe of 

 yellow pile ; third segment opaque brownish-black, with a broader margin behind of yellow pile ; fourth 

 segment shining, but its surface mostly concealed beneath the recumbent, light sulphur-yellow pile. Legs 

 black ; knees yellow. Wings in front brown ; behind, including the anal angle and cell, and the discal 

 and posterior cells, except the anterior part of the first posterior cell, nearly hyaline. 



Length 12-13 millim. 



Hab. Mexico, Omilteme in Guerrero 8000 feet (//. Smith). 



Two specimens. 



SPILOMYIA. 



Spilomyia, Meigen, in llliger's Magazin, ii. p. 273 (1803). 

 Miwtemyia, Macquart, Hist. Nat., Dipt. i. p. 491 (1834). 



BIOL. CENTR.-AMEK., Dipt., Vol. III., May 1892. I 



