230 BRITISH GUIANA TIPULIDAE 



Rhamphidia albitarsis Osten Sacken 



1887. Rh mphidia albitarsis Osten Sacken, Berl. Ent. Zeitsch., xxxi, 184. 

 1896. Rhamphidia albitarsis Williston, Trans. Ent. Soc. Lond., 1896, 288, 

 pi. 10, fig. 59. 



One typical specimen, ad', from Bartica, November 26, 1912, 

 A second specimen, 9 , from the same place on February 8, 1913, is 

 quite normal but the tarsi are not whitish, being of a very light 

 brown, 



Rhamphidia uniformis sp. n. 



Wings with crossvein r-m present; veins Sc and Ri close together at their 

 tips; inner end of cell 1st Mo about on a line with the base of Rs; tarsi light 

 brown. 



Female. — Length, 5-5.3 mm.; wing, 4.4-4.6 mm. 



Rostrum rather long, slender, about as long as the head, dark brown, the 

 palpi dark brownish black. Antennae short, very dark brown. Head ver}^ 

 dark brown. 



Pronotum and cervical sclerites dark brown. Mesonotum rather light 

 brown, shining, the postnotum much paler, yellowish brown, this color 

 suffusing the pleuritcs except the more dorsal ones which are brown ;sternites 

 pale like the ventral pleura, Halteres rather short, pale, the knob darker. 

 Legs; coxae yellowish brown, the trochanters and femora dark brown, the 

 latter a little paler at the base, tibiae dark brown, tarsi light brown, in some 

 specimens quite pale. Wings almost hj-aline, the veins brown, a faint 

 brownish tinge in the region of the stigma. Venation: (see pi. Ill, fig, 4) 

 Sci and Ri rather approximated at their tips; crossvein r-m present and dis- 

 tinct, situated far out toward the distal end of cell 1st M« and in this 

 respect suggesting the condition that obtains in the Old World Conosia; cell 

 Isl M« unusually long, its inner end about on a line with the origin of the 

 radial sector. 



Abdomen dark brown, the genital segment elongate, the valves very 

 slender, the upper pair acicular. 



Habitat. — Bartica, January 28, 1913 to February 8, 1913, 



Holotype, 9 , Bartica, February 1, 1913, 



Paratypes, 2 9 , topotypic, January 28, 1913; February 8, 1913, 



Rhamphidfa mirabilis sp. n. 



Pale reddish yellow, the wings banded with brown. 



Male. — Length, 5-5.6 mm.; wing, 5.1-5.3 mm. 



Female. — Length, 5.8-6 mm.; wing, 4.8-5.3 mm, 



Male: Rostrum elongate, much longer than the head, dark brown, the 

 palpi brownish black. Antennae light brown, the verticils on flagellum 

 long, black, conspicuous. Head blackish with a sparse gray bloom. 



Pronotum light yellow, Mesonotal praescutum reddish yellow without 

 apparent stripes; scutum with the outer cephalic half of each lobe dark 



