FLIES OF THE GENUS OGCODES — SCHLINGER 309 



to the understanding and clarification of this group, and who has so 

 generously given me help on this and other projects now in progress. 



Ogcodes species 



Several specimens examined could not be placed with any degree 

 of certainty. It is possible that they represent new species or 

 subspecies, or that they are merely variations of known species whose 

 limits have not yet been determined. 



(1) Ogcodes species similar to adaptatus but differing mainly in the 

 very small size and in having the aedeagus somewhat depressed 

 apically. 



California: 3 c?, 2 ? , Mill Valley, Marin Co., July 6, 1924 (E. P. Van Duzee), 

 Sept. 11, 1949 and June 27, 1950 (E. S. Ross), June 12, 1950, in cheesecloth trap, 

 and June 30, 1950 (H. B. Leech, all in CAS); !<?, Fallen Leaf Lake, Lake Tahoe, 

 El Dorado Co., Aug. 1931 (O. H. Swezey), and 1?, same data, July 14, 1915 

 (E. C. Van Dyke, both in CAS); Id", "Idlewild" (probably Idyllwild), July 5, 

 1928 (E. C. Van Dyke, CAS). Some of the above specimens were recorded by 

 Sabrosky (1948) as "west, subsp. of pallidipennis ." 



(2) Ogcodes species near boharti, pallidipennis, and adaptatus. 

 There are fom* specimens which seem to differ sufficiently from the 

 above-named species (mostly by coloration, and when males, by the 

 genitalia) that their identity is questioned. 



Arizona: 1?, White Mts., June 19, 1950 (P. P. Cook, UK); Icf, Oak Creek 

 Canyon, July 9, 1941 (R. H. Beamer, UK) [this is definitely not boharti]; Icf, 

 Sunnyside Canyon, Huachuca Mts., July 9, 1940 (E. E. Kenaga, UK). 



New Mexico: Icf, Ruidosa, June 26, 1940 (R. H. Beamer, UK). The last 

 three specimens listed were recorded by Sabrosky (1948) as "west, subsp. of 

 pallidipennis." 



(3) Ogcodes species, probably borealis or eugonatus (wings broken 

 off). 



Wisconsin: 1?, University Arboretum, July 1, 1946 (J. R. D., UW). 



Ogcodes (JSeogcodes), new subgenus 



Type species: Oncodes albiventris Johnson, by present designation. 



Diagnosis: Differs from subgenus Ogcodes as follows: Antenna! 

 segment iii short, not more than three times longer than broad, its 

 apex beset with five or six long setae, each about one-half as long 

 (male) or as long as segment iii (female) as shown in plate 5, figure 

 23; antennal sensory pit large. Proboscis minute but visible, not 

 covered by membrane in dead specimen, rather shining. Wing 

 venation as in plate 4, figure 17. 



Discussion: At the present time only the Nearctic albiventris can 

 be placed in this subgenus; however, it seems likely that more may be 

 included when other little-known species can be carefully studied. 



