432 ON SPECIES OF HAUENA SMITH. 



black ringed. Orbicular coucolorons or slightly paler, ovate, some- 

 what oblique. Eeuiforiu large, broad, outwardly white marked. Sec- 

 ondaries dusky, somewhat darker outwardly. Beneath, dusky, pow- 

 dery 5 secondaries with discal line and spot. Thoracic tufts not dis- 

 colorous ; basal tufts sometimes ferruginous tipped. 



Expands 43 to 50 millimetres, 1.75 to 2 inches. 



Habitat. — California, Washington. 



Easily distinguished from all the preceding, and with a decided rela- 

 tion to some of the species of the next group. 



Xylophasia occidens Grt. 



1878. Grt., Bull. U. S. Geol. Suiv. iv, 177, Hadena. 



Ash gray ; median and terminal spaces and costal region, except at 

 apex, darker. A brown shade occasionally in median space. Basal 

 line geminate, marked on costa; a longitudinal black shade over vein 

 1. T. a. line rather even, with a slight outward curve ; inner portion 

 of line obsolete. T. p. line geminate at inception, the outer line becom- 

 ing obsolete over cell. A strong outward curve over cell, and a deep 

 inward angle below reniform to vein two ; then outwardly oblique to 

 hind angle. S. t. line regularly sinuate, broad, marked by a contin- 

 uous dusky preceding shade and the darker terminal space. A faint 

 dusky line nearly through middle of median space. Claviform small, 

 concolorous, black ringed. Orbicular, large, pale. Reniform large, 

 kidney shaped, pale, iuferiorly touching the t. p. line. Secondaries 

 grayish fuscous, darker outwardly. Beneath very pale gray, with dusky 

 outer line and discal spot. Thoracic tufts concolorous. 



Expands 42 to 44 millimetres; 1.70 to 1.75 inches. 



Habitat. — Nevada, Colorado. 



I have seen only the 9 ; but there is little doubt of its being struc- 

 turally like its allies. Its gray color and peculiarly incurved t. p. line 

 render it readily distinguishable. 



Group Perpensa. 



Only one species-i— perjoewstt Grt — is referred to here. It agrees with 

 the following W-marked group in habitus and in the longitudinal shade 

 through the center of primaries. The latter are shorter, more obtuse, 

 the margin scalloped, and the hind angle retracted. These features 

 really form the only basis for the group ; but the insect is a peculiarly 

 marked one fitting in no other category, and as the divisions are purely 

 artificial and for convenience of recognition only, there is no objection 

 to the course. The tuftings of thorax are distinct, but not prominent ; 

 those of abdomen well marked. The genitalia are essentially like 

 these of the preceding. The upper angle of tip of harpes is broad, 

 deeply excavated, the inferior margin nearly straight, fringed witii 

 spinules; the inner inferior angle with a bunch of longer spines. The 



