138 Journal New York Entomological Society. t Vo1 - xxvii. 



Female. — Length, 5.5 mm. ; wing, 4.6 mm. 



Rostrum and palpi dark brown. Antennae with the first segment brownish- 

 yellow, the second segment yellow with the apex darker ; flagellar segments 

 long-oval, dark brown the black verticils longer than the segments. Head 

 brownish. 



Mesonotal praescutum reddish-yellow, the extreme margin almost white ; 

 three black stripes, the median one shiny, broadest in front, becoming indis- 

 tinct behind ; lateral -stripes rounded-oval ; scutal lobes blackish, the median 

 area paler; scutellum largely dark; postnotum black, the lateral portions 

 white. Pleura whitish, a broad black dorsal stripe extending from the cer- 

 vical sclerites to the abdomen ; sternites dark brownish-black. Halteres pale 

 brown, the knobs darker brown with the extreme tips yellowish. Legs with 

 the coxae the trochaners whitish ; femora yellow with the extreme tips brown ; 

 tibiae yellow, the tips blackened ; metatarsi yellowish, brownish at the tips ; 

 remainder of the tarsi dark brown. Wings with a faint brownish-gray tinge, 

 the costal region more yellowish ; stigma small, pale brown ; veins dark brown, 

 those of the costal region more yellowish. Venation (Plate I, Fig. 10) : Sc 

 very long, terminating just before the fork of the sector; Sc 2 far removed 

 from the tip of Sc 1 ; Rs long, almost straight beyond the origin ; r before the 

 middle of the long 7? 2+3 ; R. 2 short, oblique, a little shorter than R„ +3 ; cell 1st 

 M 2 open by the atrophy of the outer deflection of M 3 ; petiole of cell M, a little 

 shorter than the cell ; basal deflection of Cu x at the fork of M. 



Abdominal tergites brown, the sternites paler; ovipositor reddish; tergal 

 valves of the ovipositor long and but slightly upcurved, acute at the tips ; the 

 shorter sternal valves bear long fringes of hairs along the margin. The abdo- 

 men of the type is partly filled with large eggs which give a dark color to that 

 part of the body. 



Habitat: Panama (Darien). 



Holotype, 5> Ri° Chico, near the mouth of the Rio Porcona, 

 Department of Panama, August 4, 1918 (Axel Olsson). 



This handsome little species is obviously related to the type of 

 the subgenus, G. (G.) slossoncc Alex., but differs from it in the diag- 

 nostic characters outlined above. 



Gonomyia (Leiponeura) gladiator new species. 



Generally similar to G. (L.) pleuralis (Will.) and related species ; outer 

 angle of the hypopygial pleurite produced into a slender, chitinized hook that 

 is longer than the pleurite alone. 



Male. — Length, 5.5-6.4 mm.; wing, 4 mm. 



Female. — Length, 6.7-6.8 mm. ; wing, 4.5-4.7 mm. 



Rostrum and palpi dark brown. Antennae with the scape brownish-yellow, 

 the flagellum dark brown, in the male with exceedingly elongate verticils. 

 Head yellowish, darker medially. 



Disk of the mesonotum rich brown, the margin light yellow. Pleura 



