2 Journal New York Entomological Society. fVoi. xxviii. 



Rostrum dark brown, rather elongate, the tips of the paraglossae compara- 

 tively short. Antennae with the scapal segments brown, the flagellum dark 

 brown; basal flagellar segments oval, the terminal segments cylindrical. Head 

 pale reddish, heavily gray pruinose, the gense buflfy. Vertex between the eyes 

 rather narrow. 



Mesonotum dull yellow, the prascutum with three very broad brown 

 stripes that are practically confluent ; scutum with the lobes largely dark 

 brown ; scutellum dark brown, broadly margined with yellow or, in some cases, 

 entirely yellow ; postnotum dark brown. Pleura uniformly dull yellow, the 

 mesonotum whitish pruinose. Halteres brown, the base of the stem paler. 

 Legs with the coxse and trochanters yellow ; femora pale yellowish brown, the 

 tips a little brighter and with a very indistinct and narrow brown annulus ; 

 tibiae light brown, the tips narrowly darker ; tarsi dark brown. Wings sub- 

 hyaline ; stigma oval, dark brown ; veins dark brown. Venation : Sc long, Sci 

 extending to about opposite two thirds the length of the long sector, Sc2 not 

 far removed from the tip of Sci ; a supernumerary crossvein in cell Sc a short 

 distance before the origin of the sector; Rs long, about three times as long as 

 the basal deflection of Ri + ^; basal deflection of C«i some distance before the 

 fork of M. 



Abdominal tergites dark brown, the lateral margins of the tergites more 

 yellowish ; sternites yellowish. Male hypopygium with the ventral pleural ap- 

 pendage large, greatly exceeding the pleurites; two acute needle-like points on 

 either side at the base of the ventral pleural appendage. 



Habitat. — Argentina. 



Holotype, J*, Province of Buenos Aires (C. Bruch). 



Allotype, 5. 



Paratopotypes, S (^>2- 



Geranomyia argentinensis belongs to the group of G. canadensis 

 (Westwood) and is most nearly allied to G. guatemalensis A\Q-x.a.ndtr 

 from which it may be told by the shorter rostrum, the different tho- 

 racic and abdominal pattern, the less distinct brown femoral ring, 

 and other details. 



Genus Dicranomyia Stephens. 

 Dicranomyia amazonica new species. 



Size large (wing of ,^ over 8 mm.) ; general coloration black, the prsescu- 

 tum reddish with a shiny black median stripe ; wings grayish brown, the costal 

 region and narrow seams along the cord darker brown, Sc long, cell ist M^ 

 small, subquadrate. 



Male. — Length, 7.8 mm. ; wing, 8.5 mm. 



Rostrum and palpi dark brown. Antennae black throughout, the last seg- 

 ment elongate subulate. Head dark brown, gray prviinose, the vertex narrowed 

 between the eyes, the latter with large coarse ommatidia. 



