March, 1920.] ALEXANDER: NEOTROPICAL CrAXE-FlIES. 7 



Vol. 20, pp. 46, 47; 1913J which must likewise be considered a doubt- 

 ful member of the genus. The present species may be told by the 

 long antennae and the details of venation, especially the shorter sub- 

 costa, the lack of a spur of vein 7?,., and the shorter cell first M^ with 

 the longer veins issuing from it. That the spur on Z?,., in T. parishi 

 is a normal condition for this species is shown by the fact that it 

 bears a macrotrichia on this spur in both wings of the unique type, 

 this undoubtedly representing the origin of vein R^. 



Genus Gonomyia Meigen. 

 Gonomyia (Gonomyella) paraensis new species. 



Antennse with the basal segments light yellow, the flagellum brown ; head 

 yellow, silvery pollinose ; mesonotum lead-colored, the lateral margins narrowly 

 light yellow ; wings strongly tinged with brownish yellow, cell R^ very short, 

 cell A/j very deep. 



Male. — Length, about 4 mm. ; wing, 4.5 mm. 



Female. — Length, 4.5 mm. ; wing, 4.7 mm. 



Rostrum and palpi dark brown. Antennae with the first scapal segment 

 light yellow, stout, moderately elongated ; second segment tumid, dull yellow ; 

 flagellum slender, brown, the segments with a dense white pubescence, in the 

 male with long, secund verticils. Head light yellow, darker on the occiput, 

 covered with a sparse silvery white pollen that is m.ost distinct on the anterior 

 part of the vertex. 



Pronotum yellow medially, the sides d^rk. Mesonotal praescutum dark 

 lead color, sparsely pollinose, the lateral margin narrowly but conspicuously 

 light yellow, two indistinct brownish stripes occupy the region of the inter- 

 spaces; remainder of the mesonotum dark plumbeous. Pleura dull yellow, 

 with a broad, ill-defined, dusky, dorsal stripe. Halteres dark brown. Legs dull 

 yellow, darkening on the tibiae and tarsi, the latter dark brown. Wings strongly 

 brownish yellow, the costal region more saturated ; stigma indistinct ; veins 

 brown, the costal veins more yellowish. Venation : Sci ending slightly before 

 the fork of Rs ; fusion of /?j + , very long, the cell R, being shorter than in any 

 other described American species of Gonomyella; r at about two fifths the 

 length of ^j + j; cell A/j very deep; basal deflection of Cm, just beyond the 

 fork of M. 



Abdominal tergites dull yellowish brown, the sternites more yellowish; 

 hypopygium dull brownish yellow. In the female the antennae are shorter, 

 the abdomen dark brown. Ovipositor horn-colored, the tergal valves very long, 

 slender, upcur\-ed at the tip. 



Habitat. — Brazil. 



Holotype, J*, Prata, Para, June 30, 1919 (H. S. Parish). 



Allotype, $. 



