SYNOPSIS OF NORTH AMERICAN SYRPHID^. 125 



Baccha dimidiata. (Plate V, fig. 10.) 



i>yrj)hus diwldiatua Fabricius, Species Insect., ii, 434, 64; Eut. System., iv, 310, 



118; Wiedemaun, Anss. Zw. Ins., ii, 140, 42. 

 Scaeva dimiditata Fabricius, Syst. Antl., 254, 25. 

 Oeypiamua dimidiatus Scliiner, Novara Exped., 34G ; Osten Sackeu, Cat. Dipt. 



Eahitat.—West Indie.s ! Brazil (Scbiuer). 



$ . Leugtb, G™'". Front sliiuiug violet black, very narrow above, with 

 short blackish pile. Antennae brownish black, third joint subtriangu- 

 lar. Eyes nuich convergent below. Face yellowish white, obscurely 

 blackish in the middle, and on the oral margin; sometimes wholly yel- 

 lowish white and extending up on the sides of the front below. Thorax 

 shining brownish black; pleurse whitish pollinose. Abdomen bare, 

 deep shining, somewhat metallic brown, only a little elongate, not reach- 

 ing to the tip of the wings, broadest at tip of second segment, thence 

 gently narrowed to the tip of the fifth segment. Venter obscurely 

 brownish yellow. Legs blackish brown. Wings blackish brown on the 

 basal half, hyaline on the outer portion ; the border of the brown extends 

 across nearly straight from before the tip of the first longitudinal vein to 

 the tip of the sixth. 



Four specimens, San Domingo (G. F. Frazar). 



ADDITIONAL NORTH AMERICAN SPECIES. 



Baccha clavata Fabricius, Syst. Autl., 200, 3; Wiedemann, Auss. Zw. Ins., ii, 94, 4; 

 Schiner, Novara Exped., 341. S. Am. (Schiner) ; W. Indies (O. S.). 

 Syrjihus clavatits Fabricius, Ent. Syst., iv, 298, 73. 

 Baccha cochenillivora Gueriu, Rev. Zool., 1848, 350; Bull. Soc.Ent., 1848. Guatam. 

 Baccha conformis. 



OcyptatHua conformis Loew, Ceutur., vii, 67. Cuba. 

 Baccha cubeusis Macquart, Dipt. Exot., 4e Suppl., 161, 5. Cuba. 

 Baccha cylindrica Fabricius, Syst. Antl., 199,2; Wiedemann, A. Z., ii. 92. 



Syri)hus cyliiidricus Fabricius, Spec. lusect., ii, 249, 41; Ent. Syst., iv, 298, 74. 

 Baccha fasciata Roder, Stett. Ent. Zeit., 1885, 342. Porto Rico. 

 Baccha fraterna Bigot, Ann. Soc. Eut. de Fr., 18S3, 324 {Oeyptamus). Mexico. 

 Baccha funebris. 



Oeyptamus funebris Macquart, Hist. Nat. Dipt., i, 554, 1; Dipt. Exot., ii, 105; 



Bigot in Ramon de la Sagra, etc., 807; Schiner Novara Exped., 346 ("Ob 



sie mit Macquart's Oeyptamus fascipennis [B. fuscipennis] identisch ist, 



vermag ich nicbt zu entscheiden.") 



Baccha infuscata Bigot, Anu. Soc. Ent de Fr., 1883, 324 {Oeyptamus). Mexico. 



Baccha lineata Macquart, Dipt, Exot., ler suppl., 139, 4; pi. 20, fig. 5. Yucatan, 



Texas ? 

 Baccha luctuosa Bigot, Ann. Soc. Ent. de Fr., 1883, 334. Mexico. 

 Baccha marmorata Bigot, Ann. Soc. Ent. de Fr., 1883, 333. Mexico. 

 Baccha notata Loew, Centur., vii, 65. Cuba. 



Baccha parvicornis Loew, Wieu. Ent. Monats. v, 41 ; Centur., vii, 64. Cuba. 

 Baccha rufiventris Bigot, Ann. Soc. Eut. de Fr., 1883, 'Si'b {Oeyptamus). Caba. [=z.B. 



dimidiata f ] 

 Baccha scutellata Loew, Centur., vii, 69 {Oeyptamus). Cuba. 



