23 



more or less ochreous bordered inwardly above inner margin by a 

 dentate brown line and with traces of an irregular brown defining 

 line outwardly. 



Hydriomena cyriades Druce. 



Judging by the figure (Biol. Cent. Am. PI. 56, Fig. 10) we have 

 a specimen of this species from Tucson, Ariz. It is rather smaller 

 than the figure but agrees well in coloration and maculation. 



Xanthorhoe alticolata sp. nov. (PI. I, Fig. 9). 



$. Antennae very shortly bipectinate; head, thorax, and abdomen dark 

 gray, the latter black-banded ; primaries dark gray crossed by a prominent bright 

 brown median band edged on both sides by whitish, the inner edge gently 

 rounded, the outer edge oblique at costa (not inwardly rounded) projected out- 

 ward at vein 4, bent back to near base of vein 2 and then straight to inner mar- 

 gin; a dark upright cross line near base of wing, preceding which the basal 

 area is slightly ocher tinted; equidistant between this line and the inner edge 

 of median band is a second dark line slightly crenulate ; the area beyond slightly 

 paler gray and crossed by a fine hair line very close to median band; the cen- 

 tral portion of the median band is rather paler tinted than the outer portions, 

 this area being bounded inwardly by a dark line parallel to inner edge and out- 

 wardly by a slightly waved geminate dark line, distinctly bent inward at costa 

 and then sub-parallel to outer margin of wing; subterminal area gray with 

 dark dots on the veins, faintly connected by a dark shade line ; s. t. line white, 

 evenly scalloped, preceded and followed by smoky shades, especially distinct 

 opposite cell; a dark broken terminal line; fringes smoky, paler outwardly; 

 secondaries smoky, paler in basal and median areas with two central parallel 

 curved lines, bent downward from vein 2 to inner margin; faint traces of a 

 dark postmedian line and white s. t. line; terminal dark line and fringes as on 

 primaries. Beneath smoky with postmedian line of upper side repeated; small 

 discal dots on all wings. Expanse 30 mm. 



Habitat: Silverton, Colo. (July 8). 1 $. Type, Coll. Barnes. 



The short pectinations of the $ antennae at once distinguish the 

 species from the munitata group ; its appearance is rather like that of 

 a large designata Huf. 



Perizoma tahoensis sp. nov. (PI. II, Fig. 8). 



Palpi short, blackish ; front and collar ochreous ; thorax blackish, sprinkled 

 with white; primaries pale gray, shaded with smoky; costa with a dark patch 

 near base from which a vertical dark line crosses the wing; beyond this is a 

 geminate dark line, the outer portion most distinct and slightly dotted on the 

 veins, followed by a narrow pale band of ground color; in the middle of the 

 costa is a quadrate dark blotch from the inner and outer edges of which parallel 

 and nearly vertical dark lines cross the wing, the included area being shaded 



