NORTH AMERICAN LEPIDOPTERA. 
]21 
viction that the species must have maxillary palpi. As a matter of 
fact the supposed palpi are merely the projecting and somewhat 
thickened edges of a Hat, plate-like clypeal process, arising below 
the frontal tubercle. The single ? possessed by Zeller must also 
have been rather imperfect, since he failed to note the fact that the 
fore-tibipe were armed at tip with a long inner and shorter outer 
spine or claw, though the color and structure are otherwise accurately 
described. 
Referred to the Noctuidie the relation to Antaplarja sexseriata Grt. 
is at once obvious, and to this genus Zeller’s species must be referred, 
as A. biundulata Zell. It differs from the described species in the 
presence of the clypeal plate below the tubercle, but this will scarcely 
warrant generic separation. From A. sexseriata, which it closely 
resembles in maculation, it differs in the somewhat heavier bands, 
and in the absence of the subterminal black dots. 
THYREIOK n. geu. 
Body plump, robust, thorax with thin hairy vestiture. Head re- 
tracted, front flat; palpi short and weak, scarcely exceeding the 
front; tongue moderate in length ; antennae of % stout, rather short, 
with short, thick lateral teeth. Tibiie spinose, clothed with i-ather 
long thin hair ; anterior pair abbreviated, broad at tips, with a single 
long inner claw, and a series of two or more along the outer edge. 
Primaries proportionately short and small, the co.sta concave, apices 
somewhat drawn out, outer margin oblique, scarcely convex out- 
wardly. 
d'his genus is to replace Aedophron as used by Mr. Grote. I 
pointed out eight years ago that Mr. Grote’s species snowi could not 
be referred to Lederer’s genus, but as I had no specimens I made no 
change in the reference. Mr. Grote, in his List of 1890, has made 
no change in the generic location of the species, though he has based 
a number of new genera on characters pointed out for him by others. 
The occurrence of a new species, close to snowi, enables me to give 
the above description. The genus Aedophron retains as its single 
American representative, Tepper, differing from the European 
representative as already pointed out by me. 
Th. rosea .sp. nov. — Head and thorax a rather sordid pale lemon-yellow; 
abdomen deep blackish gray. Primaries above, yellow to the s. t. space, thence 
rosy red to the outer margin, receiving an admixture of yellow outwardly; 
fringes pink ; a ray of rosy red extends through the cell, joining the marginal 
TRANS. AM. ENT. SOC. XVIII. 
(16) 
MAY. 1891. 
