126 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 90 



KEY TO THE SPECIES OF MARTYRHILDA BASED ON 

 COLORATION 



1. Ground color of fore wing white or whitish 2 



Ground color of fore wing otherwise 4 



2. Costa with a large fuscous blotch at middle canella (Busck) (p. 128) 



Costa without large dark markings 3 



3. Basal segment of antenna sordid whitish; hind wing smoky 



fuscous sordidella, new species (p. 132) 



Basal segment of antenna fuscous; hind wing white, nivalis (Braun) (p. 139) 



4. Base of fore wing dark reddish brown or blackish fuscous 5 



Base of fore wing otherwise 7 



5. Ground color of fore wing straw yellow gracilis (Walsingham) (p. 133) 



Ground color of fore wing otherwise 6 



6. Ground color of fore wing light reddish ochreous 



umbraticostella (Walsingham) (p. 130) 

 Ground color of fore wing pale ochreous-gray. 



thoracenigraeella (Chambers) (p. 135) 



7. Costa, to about middle, lighter than general color of wing 8 



Costa not contrastingly lighter than remainder of wing 10 



8. Third segment of labial palpus immaculate., hildaella, new species (p. 140) 

 Third segment of labial palpus maculate 9 



9. Fore wing suffused or marked with reddish or brownish; alar 



expanse 20 mm. or more klamathiana (Walsingham) (p. 142) 



Fore wing without reddish or brownish suffusions or markings; 



alar expanse 19 mm. or less sciadopa (Meyrick) (p. 144) 



10. Ground color of fore wing grayish fuscous strongly overlaid with 



whitish ochreous sphaeralceae, new species (p. 138) 



Ground color of fore wing brownish fuscous sparsely irrorated 



with whitish ochreous thoracefasciella (Chambers) (p. 136) 



KEY TO THE SPECIES OF MARTYRHILDA BASED ON MALE 

 GENITALIA 



1. Gnathos reniform (figs. 100, 143) 2 



Gnathos not reniform (fig. 149) 4 



2. Transverse arm of clasper extending beyond middle of harpe (figs. 



67, 143) 3 



Transverse arm of clasper short, stout, not extending beyond 



middle of harpe (fig. 145) sordidella, new species (p. 132) 



3. Harpe slender; both arms of clasper of about equal length; trans- 



verse arm reaching costa of harpe (fig. 143) 



umbraticostella (Walsingham) (p. 130) 

 Harpe short, broad; transverse arm of clasper longer than longi- 

 tudinal arm but not attaining costal edge of harpe (fig. 67) 



canella (Busck) (p. 128) 



4. Lobes of transtilla fused (figs. 146, 147) 5 



Lobes of transtilla not fused (figs. 148, 149, etc.) 6 



5. Sacculus as broad as one-third width of harpe at base; transverse 



and longitudinal arms of clasper of about equal length; 

 aedeagus about one-half length of harpe (fig. 146) 



thoracefasciella (Chambers) (p. 136) 



