364 



species included are not unlike those in Oidacmatophorus, but differ in having 

 R., and R^ of the primaries at least short-stalked . In the genotype they are long 

 stalked. (See pi. XLVIII, fig. 5.) 



We have felt some doubt about placing several of the species 

 included here, for they seem to make a rather heterogeneous group. 

 They agree, however, in the stalked second and third branches of the 

 radius. Bipnnctata and zcphyria are the most nearly typical, and 

 both have genitalia of the usual Oidacmatophorus form, yet the others, 

 in which R.^ and R^ are only short stalked, have genitalia of a different 

 and definite type, with the exception of citierasccns. In none of them 

 are the genitalia similar to those of Oidacmatophorus. These species 

 satisfy Meyrick's characterization of Adaiua, however, and even after 

 careful examination of a long series we are unable to find characters 

 on which we are willing to base a new genus. We are at a loss to 

 account for the peculiar discrepancies which exist in the genus as it 

 stands. 



Key to the SPEaES 



1. Terminal fringe of first lobe of primaries with a pencil of whitish scales 



separating dark areas 4 



Terminal fringe without such marks ; not more than one dark area 

 present 2 



2. Middle and hind tibiae without tufts 3 



Middle tibiae with large terminal tuft, botb with median dorsal tufts, 

 that of the hind legs small and spur-like buscki 



J. Expanse not over 11.5 mm. Wings whitish. Antennae evenly colored 



bi[<unctala 



Expanse 14 mm. or more. Wings grayish, more or less powdered with 

 brown. Antennae dotted above sepliyria 



4. Hind tibiae and tarsi with dark annuli ambrosiae 



Hind tibiae pale, without rings, though with a few dark scales in darker 

 examples 5 



5. Ground color of primaries pure while ; brown irroration often heavy, 



especially in apex of first lobe 6 



Yellowish. Irroration slight, not noticeably heavy in first \ohe. . .cinerasccns 



6. Shining white powdered with scattered brown scales, with a brown spot 



at base of cleft and one on costa above it moiitana 



Similar but frecjuently almost completely covered with dense brown 

 irroration. Spot at base of cleft more or less definitely connected with 

 costal spot and with one on inner margin, forming a variably complete 

 oblique band form declivis 



