25 
Eyes naked. Palpi upturned, the third joint slightly porrected; 
second joint fringed with long hair below which at times tends to form an 
apical tuft; third joint more or less smooth-scaled. Front normally 
strongly tuberculate, occasionally with the tubercle reduced or entirely 
lacking. Hale antennas variable, either ciliate, or serrate and fasciculate, 
or bipectinate. Tibiae all strongly spined; fore tibia shorter than or sub- 
equal to first tarsal joint, smooth-scaled, with a complete row of spines on 
each side, the terminal ones being stoutest. Mid tarsi with a fourth row 
of spines situated on outer side laterally. Thoracic vestiture variable, 
generally of mixed scales and hair, but at times entirely hairy; tufting 
improminent, but usually with indications of divided tufts anteriorly and 
posteriorly. 
Figure 1. Male genitalia of Euxoa mocrens Grt. 
Male Genitalia. Clasper moderately long, of more or less even width 
throughout, with well-developed corona; sacculus strong with its lower 
edge drawn out to a free arm of variable length, usually narrow and pointed, 
but occasionally broad and truncate; harpe attached more or less at right 
angles to apex of sacculus, excurved, and generally projecting somewhat 
over costal margin of clasper, forming with the free arm of sacculus the 
characteristic prong which is typical of this genus. Uncus narrow, curved. 
Clavus minute or absent. Juxta a weak chitinous plate of varying shape. 
Vesica frequently unarmed, but at times with minute apical cornutus. 
Besides the long list of species already included in this genus in the 
1917 Check List , the writer has referred here (1925, Can. Ent. LVII, 242) 
perolivalis Sm. and Jlavicollis Sm. and later (1927, Can. Ent. LIX, 65) 
added violaris G. and K., aurulenta Grt., and scandens Riley, these three 
latter species lacking the tuberculate front, but possessing the same char- 
acteristic male genitalia. 
Chorizagrotis Sm. 
1890, Bull. 38, U. S. N. M. 10 (type, auxMaris Grt.). 
Scarcely separable from Euxoa except on genitalic characters. Front 
tuberculate. Second palpal joint fringed below with hair. Male antennae 
ciliate. Tibial and tarsal spining as in Euxoa. Abdomen rather depressed. 
