PROCEEDINGS OF THE NATIONAL MUSEUM vol. 119 



Keys to New World Species of Euchromius 



Based on Color and Distribution 



Forewing brownish from base to inner transverse postmedial band, with 

 little or no irroration (pi. 1 : fig. 1) galapagosalis, new species 



Forewing ochreous white from base to inner transverse postmedial band, 

 with fuscous irroration variable but distinct (pi. 1 : figs. 2-4) 2 



Forewing with whitish area adjacent to blackish terminal dots narrow; a 

 fine ochreous line about midway between dots and termination of irrorated 

 area (pi. 1 : figs. 2, 3) 3 



Forewing with whitish area broader and with line much closer to termination 

 of the irrorated area than to terminal dots (pi. 1 : fig. 4) . 



californicalis (Packard) 



Forewing with two transverse postmedial bands straight or nearly so; thin 

 line in whitish patch adjacent to blackish terminal dots somewhat sinouus 

 and weakly denticulate; distribution Argentina (pi. 1: fig. 3). 



saltalis, new species 



Forewing with two transverse postmedial bands usually sinuate or bent 

 inwardly; thin line in whitish patch adjacent to blackish terminal dots 

 rather smooth (pi. 1: fig. 2); distribution otherwise . ocelleus (Haworth) 



Based on Male Genitalia 



Harpe conspicuously extenuated and narrowed distally, somewhat finger-like 



(fig. 3) californicalis (Packard) 



Harpe otherwise (figs. 1, 2, 4) 2 



Aedeagus with two elongate patches of small, slender spinules basad of the 



large cornuti (figs, la, 2a) 3 



Aedeagus with but one elongate patch of small, slender spinules basad of 



the large cornuti (fig. 4a) ocelleus (Haworth) 



Harpe broad, costal margin strongly serrate with basal production truncated 



distally, apices subequal (fig. 1) saltalis, new species 



Harpe narrower than above, serration of costal margin weak, the basal 

 production rounded apically, with a single spine adjacent to apex (fig. 2). 



galapagosalis, new species 



Based on Female Genitalia 



With conspicuous hooklike sclerotizations laterad of the ostium (figs. 



5, 7) 2 



Without such hooklike sclerotizations (figs. 6, 8) 3 



Distance from ostium to origin of ductus seminalis much less than that from 



ductus seminalis to top of bursa copulatrix (fig. 7). 



californicalis (Packard) 

 Distance from ostium to origin of ductus seminalis equal to or greater than 



that from ductus seminaUs to tip of bursa copulatrix (fig. 5). 



saltalis, new species 

 Ventral margin of ostium rather broad and distinctly undulate; ductus bursae 



with some distinct spinulation between ostium and origin of ductus seminalis 



(fig. 6) galapagosalis, new species 



Ventral margin of ostium narrower than in above, and straight or nearly so; 



ductus bursae with conspicuous longitudinal grooves, without spinulation 



(fig. 8) ocelleus (Haworth) 



