FLIES OF THE GENUS OGCODES — SCHLINGER 299 



Allotype: Female, same data except June 28, 1951 (J. W. Mac- 

 Swain, CIS). 



Paratopotypes: 914 specimens, ITlcf, 7439: IScT, 139, June 28, 

 1951 (A. T. McClay); 60 cJ", 165 9, June 28, 1951 (J. W. MacSwain); 

 3(f , 2 9, June 28, 1951 (R. W. Morgan) ; 2 c^ , 19, June 28, 1951 (E. L. 

 Silver); 4c^, June 28, 1951 (C. A. Downing); 20 d", 33 9, July 6, 1951 

 (A. T. McClay) ; 7 cf, 94 9, July 11, 1951 (A. T. McClay); 8 9, July 11, 

 1951 (E. L. Silver); 8 cf, 19, July 11, 1951 (R. W. Morgan); 3 cf, July 

 11, 1951 (C. A. Downing); 21 cf, 2579, and cf9 in copula, July 12, 

 1951 (R.C.Bechtel;;ld^, 219, July 12, 1951 (W. H. Lange) ; Id', 12 9, 

 July 12, 1951 (E. J. Taylor) ; 22 cf , 132 9 , and 3cf 9 in copula, July 12, 

 1951 (E. I. Schlinger). 



Paratopotypic specimens will be deposited in lots of 10 or 20 in the 

 foUowing collections: AMNH, BMNH, CAS, CHM, CNM, CM, 

 CMNH, CSDA, CU, CWS, DEI, FRC, INKS, ISC, MCZ, OSC, 

 PANS, TAM, UBC, UCLA, UI, UK, UN, USNM, UM, UW, VNM, 

 and WSC. Other paratopotypes have been deposited as foUows: 

 205 specimens in the CIS collection, 192 specimens in the UCD 

 collection, and 140 specimens in the author's collection. 



Paratype variation: The leg coloring varies somewhat, remaining 

 black in the female, while a few males have the distal one-half of the 

 femora dark brown. The squama, particularly in the female, is 

 whitish opaque, light brown, or rarely heavily, evenly infuscated, the 

 margins being white to black. The wing is hyaline in the male, while 

 in the female it ranges from hyaline to quite heavily infuscated, the 

 latter trait being rare and characteristic of large individuals. The 

 wing veins are pale, light or dark brown, and commonly darker in the 

 female. Vein Mi and r-m crossvein, although always present, are 

 faint in a few specimens. The male genitalia do not vary significantly. 



This species is closely related to boharti, and somewhat less so to 

 yallidipennis , a species with which it has been confused. The melanic 

 coloration of adaptatus will usually distinguish it from other Nearctic 

 members of the pallidipennis group, and the male genitalia occupy a 

 rather intermediate position between boharti and pallidipennis (com- 

 pare pi. 7, figs. 36, 41, 42). None of the topotypical specimens of 

 adaptatus suggest pallidipennis in coloration, but rather resemble 

 malampus, which is a member of the eugonatus group. 



Distribution: Western North America from southern California 

 to Alaska (as shown in text fig. 9) . Most of the specimens reported by 

 Sabrosky (1948) as western pallidipennis have been examined, and 

 those with the rather brownish black habitus were actually females 

 of adaptatus in a teneral or postovipositional stage. Those specimens 

 which he recorded from Arizona, British Columbia, Mexico, New 

 Mexico, and Washington have been carefully studied and were found 



