1893.] ME. E. E. ATJSTEN ON NEW DIPTEEOUS INSECTS. 133 



Neotropical Region. 



Ocyptamus iris, p. 133 Jamaica. 



BuMcha sagittifera, p. 144 ,, 



„ signifera, -p. \Ab Brazil. 



„ levissima, p. 146 • „ 



„ inconipf a, p. 14:7 > „ 



„ pumila, p. 148 ,, 



,, silacea, p. 149 ,, 



„ (yultrata, p. 151 ,, 



,, flavens, p. 153 „ 



„ gilva, p. 154.^ 



,, crocata, p. 155 „ 



„ crocea, p. 157 , 



„ fervida, p. 158 „ 



Salpingogaster virgata, p. 159 „ 



„ wjj'nor, p. 161 „ 



Bacchini, Williston. 

 Synopsis N. Amer. Syrphidse, Bull. 31, U.S. Nat. Mus. p. xv. 



OcxPTAMUS, Macq. 



OcYPTAMUS lEis, sp. n. (Plate IV. fig. 1, $ .) 



2 . Length 7| mm. 



Face and cheeks pale yellow ; face with a sharply defined metallic 

 bronze median stripe, reaching to the oral margin ; vertex bluish 

 purple, front metallic greenish black, poUinose on the sides and in 

 the middle ; pile black. Antenniferous projection yellow in front, 

 below. Antennce orange-yellow, brown above ; third joint oval. 

 Tliorax dull purplish black on the dorsum, steely blue on the sides 

 and pleurae ; scutellum metallic, bluish in front, bronze-green 

 behind. Ahdomen metallic iridescent, with dull velvety black 

 markings ; first segment magenta, brilliant steel-blue on the sides ; 

 second segment magenta in front, merging into purplish golden 

 behind, with a reniform velvety black transverse patch in the 

 middle, not reaching to the sides ; lateral margin of the segment 

 blue ; third segment a mixture of magenta and bronze, with a 

 quadrate velvety spot on each side in the middle ; fourth segment 

 somewhat darker, golden bronze in front, greenish in the midde, 

 magenta on the posterior angles, with a quadrate velvety spot on 

 each side in the middle, more widely separated one from the other 

 than the previous pair ; fifth segment prune-purple, bluish on the 

 anterior angles : the sides of the abdomen are fringed with short 

 pale hairs, the posterior angles of the fifth segment with black 

 hairs, which project backwards. Legs yellow; posterior tibiae 

 brownish on the inner side ; the last four joints of the tarsi 

 brownish. Wings hyaline, with a conspicuous brown blotch at 

 the tip, above the third vein ; subcostal cell pale yellowish brown ; 

 tliird longitudinal vein straight : cdidce rudim.entary. 



Cinchona, Jamaica ; June : one specimen, collected and pre- 

 sented by W. Tawcett, Esq. 



This species is allied to Ocyptamus {Bacclia) cceruleus, Will. 



