FLIES OF THE GENUS OGCODES — SCHLINGER 247 



Key to the subgenera of Ogcodes 



1. Terminal antenral segment narrowed and then bulbous basally, ending in a 



rather long tapering style on whose apex are one to four small setae (pi. 5, 



figs. 25, 27) ; proboscis usually not visible in dead specimens 2 



Terminal antennal segment shorter and broader basally, with several (usually 

 5-6) long apical setae (pi. 5, fig. 23) ; proboscis visible in dead specimen 

 [Nearctic] Neogcodes, new subgenus 



2. Frons bisected medially, without pile, though usually with minute tomentum; 



terminal antennal segment without basal lateral bristle (pi. 5, fig. 25) 



[Cosmopolitan] Ogcodes Latreille 



Frons not bisected medially, covered with obvious pile (pi. 5, fig. 28) ; base of 

 termmal antennal segment with short, but strong, basolateral bristle (pi. 5, 

 fig. 27) [Australian] Protogcodes, new subgenus 



Ogcodes (Protogcodes) f new subgenus 



Type species: Ogcodes (Protogcodes) paramonovi, new species, by 

 present designation. 



Diagnosis: This subgenus, as based on paramonovi, appears to be 

 ancestral to both of the other subgenera. The foUo^ving characteristics 

 separate this subgenus from the other two subgenera: Antenna with 

 third segment styHform as in subgenus Ogcodes, but its apex beset 

 with several small setae as in subgenus Neogcodes, but differing from 

 both by having a strong basolateral bristle on terminal segment and 

 a shorter dorsal bristle on segment ii. The frons is convex, not grooved 

 medially, and is covered with obvious pile. The legs are quite long 

 and thin. The abdomen is wider than the thorax, and is turned under 

 and narrowed apically. The venter has rather large, lateral inter- 

 segmental areas. 



Ogcodes {Protogcodes) paramonovi, new species 



Plate figures 15, 27, 28, 60 



Male: Length of entire specimen 7.75 mm., wing length 8.15 mm., 

 head height 1.55 mm., head width 1.85 mm., head length 1.45 mm. 



Head large, eyes nearly black, antenna dark brown, occiput dull 

 black; frons large, about one-fourth head width, convex, covered 

 with golden brown pile about one-third as long as antennal segment 

 III (pi. 5, fig. 28); antennal segment i dish-shaped, short, segment ii 

 ball-shaped, fitting into i socket-hke, both i and ii covered with 

 minute brown hairs; segment ii has one dorsal bristle; segment iii 

 styhform, moderately swollen basally, with distinct bristle paralleling 

 and about one-half as long as style, apex of segment with four, whitish 

 brown setae (pi. 5, fig. 27); oral region oval, narrow, mouthparts 

 rudimentary, but strong sclerotized proboscial plate present with 

 long brown hairs crossing over below oral region. 



