NORTH AMERICAN LEPIDOPTERA. 335 



a distinct discal lunule. Fringes also pure wliite. Beneath, tlie wings are very 

 pale whitish yellow with hroad blackish outer margins, the discal spot of secon- 

 daries more distinct. Head with a few reddish scales between the antennae. 

 Abdomen like wings beneath. Expands 1.25 inches; 31 — 32 mm. 



Hah. — Colorado. 



Three specimens from Mr. Tepper ; one 9 in coll. U. S. N. Mus. 

 (Smith coll.). 



This is perhaps the most beautiful species of the genus, the me- 

 tallic dark scales and the very long white fringes offering distinctive 

 characters. The specimens differ considerably in the amount of 

 metallic irroration, the one so covered as to darken the entire speci- 

 men, the other, and better specimen with the dark markings only, 

 metallic. The species is most nearly allied to augustus Harvey. 



Since the description was first published I have seen several other 

 specimens none of which offer any new characters. The metallic 

 scales ai'e distinctive and are obvious in all the specimens. 



Group HOMOGENA. 



The species referred here have no strong band of union ; they 

 are all very distinct from each other and do not agree with any of 

 the other groups. There is no one strong feature to unite them and 

 negative characters only associate the species ; they agree in not 

 belonging to any other group. In all the normal maculation is dis- 

 tinctly traceable. 



Saundersiana differs from all the other species in the distinctly 

 geminate, even, dark median lines and strongly dentate s. t. line. 

 The posterior thoracic tuft is darker, the claviform is distinct and 

 there is a very even, distinct, upright median shade. 



Behrensi has the lines also geminate, but much less distinct ; the 

 color is a very even, obscure fuscous and the maculation only slightly 

 darker. The s. t. line here is punctiform, pale, and the body vesti- 

 ture is thick. It has the appearance of a Mamestra allied to cheno- 

 podii. 



Right here must belong pernotata Grote, with which I am unac- 

 quainted. It is said to lack the s. t. line and to have a solid black 

 claviform. Mr. Grote compares it with saundersiana, to which in- 

 deed, from the description, it seems very close. 



Glemiyi differs from all the others by its sordid, powdery appear- 

 ance, a yellowish fuscous shade extending over the whole insect ; the 



