72 BULLETIN 123, UNITED STATES NATIONAL MUSEUM. 



5. GalUmosema Clemens. Genotype. — Gallhnosema scintillana 

 Clemens. 



Fore wing smooth; termen straight or slightly concave between 

 veins 3 and 6; 12 veins; 7 and 8 separate; 4 and 5 separate; 10 

 much nearer to 9 than to 11 ; 11 from middle or just before middle of 

 cell; upper internal vein of cell from between 10 and 11; 3, 4 and 

 5 remote or approximate at termen but not the former when termen 

 is appreciably concave; 2 straight or very slightly bent up near 

 termen; 3 and 4 rarely fusing before termen (fig. 5); male with 

 costal fold. 



Hind wing with 7 or 8 veins ; 3 and 4 stalked, rarely united ; 6 and 

 7 approximate toward base. 



Male genitalia with harpes simple; cucuUus variously shaped, 

 sharply defined, usually with strong anal spine or spines; neck in- 

 curvation usually pronounced; neck not heavily spined or haired; 

 sacculus without heavy spine or hair clusters; costal hook present; 

 no rudimentary clasper. Socii developed ; finger like ; short or mod- 

 erate. Gnathos free to near base ; weakly chitinized but not reduced. 

 Uncus rudimentary; never more than a rounded or pointed projec- 

 tion at end of tegumen; basally broader than long. Aedoeagus 

 straight ; short or moderate ; normally stout, not needle like ; cornuti 

 a cluster of three or more elongate spines. 



The largest genus in the subfamily. It is still considerable of a 

 lump. The different types of cuculli seem to suggest the possibility 

 of further division but an attempt along these lines would separate 

 species that on pattern and general habitus seem extremely close. 

 Very likely the larvae will give us characters on which to divide the 

 genus; but as yet too small a percentage is known. As it stands 

 Eucosma represents a group of species intermediate between Epi- 

 hlema and Thiodia and with them constituting one of the two main 

 stems of the Eucosminae. 



KEY TO THE SPECIES OF EUCOSMA. 



1. Fore wing unicolorous; sometimes finely dusted, finely and evenly spotted, 



or with a single small spot at end of cell, but with no large dark spots or 

 perceptibly clouded areas nor appreciable white lines nor ocelloid patch 



nor other conspicuous markings 2 



Fore wing otherwise 17 



2. Ground color of fore wing white c> 



Ground color of fore wing not white -1 



3. Fore wing evenly and conspicuously spotted with black. 



(79) hyponomeutana. 

 Fore wing with only a few scattered black scales (70) larana. 



4. Fore wing bright yellow or golden 5 



Fore wing otherwise colored, often ochreous but not bright yellow or 



golden 7 



5. Fore wing yellow 6 



Fore wing golden evenly spotted with darker iridescent patches. 



(78) grandiflavana. 



