Diptera of St. Vincent {West Indies). 347 



VOLUCELLA. 



1. Volucella ohesa. 



Syrpliiis ohesus, Fabridus^ Syst. Ent., 763. (For 

 synonymy, see Williston, Biol. Centr.-Amer. Dipt., 

 iii., 50.) 



Six typical specimens of this cosmopolitan insect are 

 in tlie collection. 



Volucella, sp. n. ? 



Three specimens belonging to the difficult group of 

 pallens, vesiculosa, etc. I cannot find any description 

 that will apply well to the specimens. They differ from 

 V. pallens, Wied., in the presence of a median and two 

 lateral facial stripes, in the hair of the mesonotum being 

 for the most part black, and in the presence of a large 

 black spot on the scutellum. From both V. vaga, Wied., 

 and V. hyaloptera, Gigllo-Tos, the facial stripe vvill dis- 

 tinguish the species, as well as other characters. 



Baccha. 

 Fabricius, Syst. Antl., 199, 1805. 



1. Baccha clavata. 



Syrphus clavatus, Fabricius, Ent. Syst., iv., 296. 



Baccha clavata, Fabricius, Syst. Antl. 200 ; Wiedemann, 

 Auss. Zw. Ins., ii., 94; Schiner, Nov. Exped., 341 ; 

 Wulp, Tijdschr., v., Ent., xxvi., 1 ; Eoeder, Stett. 

 Ent. Zeit. 1886, ^42 ; Williston, Trans. Amer. 

 Ent. Soc, XV., 270; Biol. Centr.-Amer. Dipt., iii., 

 33 ; Giglio-Tos, Ditt. del Messic, ii., 57 ; Austen, 

 Proc. Zool. Soc. Lond., 1893, 159; Hunter, Can. 

 Ent., xxviii, 96. 



Baccha huhista, Walker, List, iii., 549 ; Williston, 

 Synopsis N. A. Syrph. 117, pi. iv., fig. 9 (Willis- 

 ton, Austen). 



Baccha varia. Walker, List., iii., 549 (Austen). 



Paragus scutellatus, Y/alker, Trans. Linn. Soc. Lond., 

 xvii., 342 (Austen). 



Baccha facialis, Th.om.sou, Eugenics Eesa, 504 (Willis- 

 ton). 



Spardg aster hacchoides. Bigot, Ann. Soc. Ent. Fr., 1883, 

 326 (WilHston). 



