104 BULLETIN 38, UNITED STATES NATIONAL MUSEUM. 



and ranked as a group, there is a general tendency to a strigose char- 

 acter of macuhition, the ordinary transverse lines becomiug more or 

 less obscured, and sometimes entirely wanting. Of these the species 

 ranged under group acclivis are dark in color and have the ordinary 

 spots normal, not confluent; the species" of group albalis are pale, 

 whitish or with a yellowish tinge, the ordinary spots more or less com- 

 pletely confluent. 



Gronp ABNORMIS. 



As already indicated, the character separating the single species of 

 this gronp from the others with which it is structurally allied is found 

 in the presence of the normal noctuid maculation, as compared with the 

 strigate type of the other species. 



Rhizagrotis abnormis Smith. 

 1890, SniiMi, Trans. Am. Ent. Soc. xvii, 41, Agroiis. 



The general color is carneous gray, variably shaded or suffused with 

 a more reddish tint. Palpi brown at sides; a broad blackish trans- 

 verse band at base of collar. Primarii-s with basal line present, gemi- 

 nate, black, dentate. T. a. line geminate brown or blackish, the inner 

 line faint, included space paler in. dark specimens, concolorous in i)ale 

 examples; upright, outwardly angulate below costa, in the submedian 

 interspace, and again below the internal vein. T. p. line single, or 

 with the outer part of geminate line indicated only by a dusky costal 

 spot and a short dusky shade, its course outcurved over, and very close 

 to reuiform, then very evenly i^arallel to outer margin. S. t. line very 

 slightly paler, outwardly angulated on veins .3 and 0, emphasized by 

 a distinct dusky jjrecediug shade, which in pale specimens sometimes 

 becomes the most prominent feature. A narrow, interrupted, dark 

 terminal line. Claviform very faintly indicated by a few dark scales. 

 Orbicular well sized, oval, oblique, sometimes not comi)letely defined 

 posteriorly, narrowly black ringed, concolorous in pale specimens, paler 

 in darker examples. Eeniform narrowly black ringed, of the gray 

 ground color with a more leaden gray filling, i)rominent interiorly. 

 Secondaries of the usual dirty gray brown, somewhat paler in the male, 

 discal spot evident. Beneath powdery fuscous, paler in the male, with 

 distinct, though sometimes interrupted outer line and an evident discal 

 spot on all wings. 



Expands 34-37"""; 1.37-1.50 inches. 



Habitat. — Siena Nevada, California. (McGlashan). 



The species at first sight seems allied to some forms in the tesscllata 

 group. The genital structure is different, however, the clasper not 

 being bifurcate. 



Group ACCLIVIS. 



Anterior tibire strongly spinose, the terminal armature heavier; front 

 broad, not much inflated, rough, granulate rather than tuberculate. 

 Antenuie of S simple or ciliate merely. 'The primaries are at least 



