CHARLES P. ALEX.A.NDEK 229 



basal two very small, the third, at the stigma, and the fourth, at cross vein 

 r, very large and conspicuous; caudal half of the wings strongly infumed 

 with gray, the tip darker. Venation: (see pi. Ill, fig. 3) Sc ending slightly 

 beyond the origin of Rs,Sc2 at its tip ; Ri long, slightly angulated at origin, 

 about four times as long as the deflection of Ri+',; cell l.t Mn long and nar- 

 row as in clnerehioln Alex. 



Abdomen with the basal tergites dark brown, apical tergites reddish 

 brown wit h a narrow indistinct darker median line ; basal sternites yellowish, 

 apical sternites brown, the hypopygium yellowish brown. 



In the male paratype, the end of Sc is just beyond the origin of Rs. 



Habitat. — Bartica, January 8, 1913, to February 14, 1913. 



Holotyp?, c/', Bartica, January 22, 1913, in deep swamp.s. 



Allotype, 9 , with the type. 



Paratypes, 5 9,1 cf , topotypic, January 8 to February 14. 

 Geranoniyia tibialis Loew 

 1851. Aporosa tibialis Loew, LinnaeaEntom., v, 397. 



Eighteen specimens, from Bartica, January 4, 1913 to February 

 14, 1913, one taken in deep swamps, the others attracted to light 

 at night. 



Geranomyia cinereinota Alexander 



1913. Geranomyia cinereinota Alexander, Ent. News, xxiv, 407, pi. 14, 

 fig. 4. 



Nearly two hundred specimens taken at Bartica from December 

 5, 1912 to April 14, 1913 ; Mallali, March 8 to 20, 1913. This form 

 came in abundance to light and with Gonomyia pleuralis Williston 

 is the most abundant form in the collection. 

 Geranomyia virescens Loew 

 1851. Aporosa virescens Loew, Linnaea Entom., v, 398. 



One dark female that I refer to this species taken at Bartica on 



December 31, 1912. One typical male, Bartica, January 23, 1913. 



Geranomyia pallida Williston 



1896. Gerawmyia pallida Williston, Trans. Ent. Soc. Lond., 1896, 284, 

 pi. ix, fig. 53. 



Three females at Bartica, December 19, 1912 to January 30^ 

 1913, at light. One female from Bartica on February 5, 1913, in 

 the swamps. 



Tribe Antuchini 



Genus RIIAMPHIDIA Mcigen 

 1830. Rhamphidia Meigen, System. Beschr., vi. 150. 



TRANS. AM. ENT. SOC, XL. 



