28 
Male Genitalia. Clasper moderate in length, slightly bulging in basal 
portion of costa, corona reduced and generally confined to costo-apical 
section which tends to form a slight flap; sacculus moderately strong; 
harpe variable in shape, typically as in Euxoa with a curved basal attach- 
ment, below which is frequently a bunch of stiff black hair. Clavus weak 
to moderately strong. Uncus very narrow and long. Juxta weak. Aedo- 
eagus strengthened apically by a curved chitinous strip which generally is 
faintly scobinate; vesica armed with a short terminal cornutus. 
Figure 4, Male genitalia of Loxagrolis proclivis Sm. 
It has been necessary to erect a new generic name for this group, the 
species of which have heretofore been included in various genera and prob- 
ably represent a northern offshoot from the Mexican fauna. Along with 
; proclivis Sm. and neoclims B. and B., which are typical, the writer includes 
apicalis Grt. together with acclivis Morr. and its southwestern race opaca 
Harv., in which the harpe is broadened apically to a mushroom shape but 
which otherwise is close to proclivis. 
Serano Sm. may also be included; it agrees in outward structural 
details quite closely, showing, however, a better developed metathoracic 
tuft; the individual characteristics of the genitalia are the presence of an 
ampulla and the sudden broadening of the basal portion of the harpe. 
For the present salina Barnes, capota Sm., albicosta Sm., and socorro 
Barnes are placed here although the latter two are quite atypical, the 
palpi being heavily but smoothly scaled, not fringed with hair, and the 
genitalia of each showing a complete corona and considerable individual 
difference in the position and shape of the harpe. With, however, the 
writer’s limited material and his lack of knowledge of the Mexican forms 
with which they are probably allied, he does not feel justified in splitting any 
further than he has already done. 
