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and hirtifrons (9 only). 0. armstrongi was described from three 

 females and is closely related to basalis (Walker). However, when 

 color differences show up in the female sex as strikingly as they do in 

 armstrongi, chances are that the male sex, when known, will be easily 

 distinguished from basalis (Walker). I examined the male genitaHa 

 of deserticola and although the species shows a relationship to basalis 

 (Walker) it is quite distinct. The female specimen of hirtifrons that 

 I examined did not have the basal antennal seta characteristic of 

 0. (Protogcodes) paramonovi, new species, but other characteristics seem 

 to agree with the latter; hence, I tentatively place hirtifrons in the 

 new subgenus Protogcodes. 



It is difl&cult to say whether any species of Ogcodes should be de- 

 scribed from the female sex alone, particularly since most females of 

 Ogcodes species throughout the world are difficult to distinguish, and 

 as of now few structural characters are known that enable one to 

 differentiate females of one species from another. Paramonov's new 

 species waterhousei, described from a unique female, may be only a 

 variant of basalis (Walker) or armstrongi. The main specific character 

 noted for waterhousei was its darkened wings, a feature which has been 

 shown to be rather unreliable after large series were examined (see 

 discussion under adaptatus, new species (p. 299), Siud under pallidipennis 

 Loew by Sabrosky, 1944). 



