30 



DIPTEKA. 



OCYPTAMUS. 

 Ocyptamus, Macquart, Hist. Nat. Ins. Dipt. i. p. 554 (1834). 



1. Ocyptamus funebris. 



Ocyptamusfunebris, Macq. Hist. Nat. Ins. Dipt. i. p. 554 >; Dipt. Exot. ii. 2, p. 105, t 19. J 

 Schiner, Reise der Novara, Diptera, p. 346 3 ; Bigot, in Ramon de la Sagra's Hist fis. poht. y 

 nat. de Cuba, vii., Ins. p. 338 4 ; r. d. Wulp, Tijdschr. v. Ent. xxvi. p. 9 5 ; Willist. Trans. 

 Am. Ent. Soc. xv. p. 265 e . 

 Eab. Mexico, Venta de Zopilote, Xucumanatlan, Amula, Acaguizotla, Tepetlapa, 

 and Rio Papagaio, all in Guerrero, Cuernavaca in Morelos, Atoyac in Vera Cruz 

 (E. E. Smith), Santiago Iscuintla in Jalisco (Schumann).—So\JTR America, Brazil 1 3 5 6 ; 

 Cuba 4 ; Teneeiffe 12 . 



Numerous specimens. This species differs from 0. fuscipennis (Say) in the larger 

 size, the more pure bronze of the thorax, and the more uniform blackish tinge of the 

 wings, the latter with a less distinct hyaline space ; the abdomen of the male is wholly 

 shining, not black. From the description, one cannot feel assured that 0. infuscatus, 

 Bigot, is really distinct from 0. funebris. 



2. Ocyptamus dimidiatus. 



Syrphus dimidiatus, Fabr. Spec. Ins. ii. p. 434 1 ; Ent. Syst. iv. p.310 2 ; Wiedem. Aussereur. 



zweifl. Ins. ii. p. 140 3 . 

 Scava dimidiata, Eabr. Syst. Antl. p. 254*. 



Ocyptamus dimidiatus, v. d. Wulp, Tijdschr. v. Ent. xxvi. p. 10 5 ; Willist. Trans. Am. Ent. Soc. 

 xv. p. 265 6 . 



Baccha dimidiata, WiUist. Synopsis N.-Am. Syrphidse, p. 120, t. 5. £. 10 \ 



Eab. Mexico, Tierra Colorada 2000 feet, Rio Papagaio 1200 feet, Venta de 

 Zopilote 2800 feet, Acapulco, Eincon 2800 feet, all in Guerrero, Cuernavaca in 

 Morelos, Atoyac in Vera Cruz, Teapa and Frontera in Tabasco (E. E. Smith), 

 Temax in North Yucatan ( Gaumer).— South America, Brazil 6 ; West Indies 1 2 3 4 , 

 San Domingo 7 , Guadaloupe 5 . 



Numerous specimens. The males differ in having the outer part of the wings much 

 less hyaline. 



3. Ocyptamus trigonus. 



Syrphus trigonus, Wiedem. Aussereur. zweifl. Ins. ii. p. 126 l . 



Ocyptamus trigonus, Schiner, Reise der Novara, Diptera, p. 346 2 ; Willist. Trans. Am. Ent. Soc. 

 xv. p. 265 3 . 



Baccha torva, Willist. Synopsis N.-Am. Syrphidse, p. 124 4 . 



Eab. United States, Texas 4 — Mexico, Dos Arroyos 1000 feet, Xucumanatlan 7000 



