FLIES OF THE GENUS OGCODES — SCHLINGER 251 



Included species: 0. cajfer Loew, chilensis Sabrosky (?), eugonatus 

 Loew, guttatus Costa, melampus Loew, nigripes Zetterstedt, and 

 zonatus Erichson. 



Group III — borealis group 



Diagnosis: Veins Mi, Ma, M4, Cua, A, and crossveins m-cu and r-m 

 present (pi. 3, fig. 7) ; ejaculatory apodeme with median plate of 

 medium size, short wings, and well-defined basal and subbasal cells 

 (pi. 11, figs. 72, 76); aedeagus either blunt apically with large pre- 

 gonoporal and postgonoporal notches (pi. 9, fig. 56), or narrowed, 

 curved and rounded without postgonoporal notch (pi. 8, fig. 51); 

 body pile rather short, not dense; apex of antenna with two or three 

 short setae; abdomen fasciated somewhat (pi. 5, fig. 29). This group 

 was partly defined by Sabrosky (1948, p. 410) as "#2." 



Included species: 0. borealis Cole and pallipes Latreille. 



Group IV — colei group 



Diagnosis: Vein Mi usually present together with crossvein m-cu; 

 however, Mi or m-cu may be present alone in some species, but both 

 veins are not totally absent (pi. 3, figs. 9, 12; pi. 4, figs. 14, 21); 

 ejaculatory apodeme weakly developed, often inconspicuous (pi. 12, 

 figs. 95-98), or sometimes developed about as well as in species of the 

 eugonatus group (pi. 12, figs. 84, 87-90) ; basal and subbasal cells, when 

 present, wealdy defined (pi. 11, figs. 77, 79); aedeagus usually slender 

 and rather acuminate apically with or without large pregonoporal and 

 postgonoporal notches (pi. 6, fig. 31; pi. 9, figs. 52-55, 57-59; pi. 10, 

 figs. 61-64; body pile unusually long in most species, others with only 

 patches of long pUe on several tergites; apex of antenna with two or 

 three short setae; abdomen often very colorfully patterned (pi. 5, 

 fig. 30), rarely only with simple fasciae (pi. 5, fig. 29). This group was 

 partly defined by Sabrosky (1948, p. 410) as "#4, colei complex." 



Included species: 0. argigaster, new species, colei Sabrosky, 

 floridensis Sabrosky, fortnumi Westwood, hirtus Sack, kuscheli Sa- 

 brosky, leptisoma, new species, nitens (Hutton), pygmaeus White, 

 shewelli Sabrosky, similis, new species, and vittisternum Sabrosky. 



Group V — pallidipennis group 



Diagnosis: Veins M,, M2, M4, Cua, A, and crossvein r-m present; 

 crossvein m-cu absent, or at most a famt trace (pi. 3, figs. 10, 11, 13; 

 pi. 4, fig. 20); ejaculatory apodeme well developed; median plate and 

 wings large; basal cell large, complete or incomplete ventrally, sub- 

 basal cell high, but thin and rather inconspicuous (pi. 6, figs. 32, 33; 



