OF NORTH AMERICA. 49 



in tint than the general color. Posterior wings pale tawny white, very 

 narrowly margined with pale smoky gray at the apex. Fringes of all 

 the wings concolorous with the adjacent portions of the wings. Beneath 

 as above, except that the band on the anterior wings is somewhat less 

 clearly defined. 



Var./usca. The markings are identical, but all the portions which 

 are dirty white in the type, are pale smoky gray, nearly concolorous 

 with the anterior wings. 



Expanse of wings, i.oo inch. Length of body, 0.35 inch. 



Habitat. — California, (Coll. Edwards, Behr, Behrens, etc.) 



This species is found in the wooded districts round the bay of San 

 Francisco, but is less abundant than the following. The variety _/"«j-<:<2, 

 from the collection of Dr. Behr, was taken abundantly in Napa valley. 



2.-CISTHENE NEXA. (Pi. 2, fig. 11.) 



Lithosia nexa, Boisd. Ann. Soc. Ent. Belg., vol. 12, p. 74. (1868.) 

 Cisthene grista, Packard, Rep. Peab. Acad, Sci. (1872.) 

 5.?. — Head, antennce, palpi, thorax, legs and abdomen pale 

 tawny white. Anterior wings with the costa straighter than in C. 

 Faustitiula, clear smoky gray, with a short streak on the inner margin 

 at the base of the wing, and a triangular spot with serrated edges, hav- 

 ing its base on the inner margin and extending somewhat beyond the 

 median vein, pale tawny white. The projecting points of this spot 

 are edged with black at their apices. Posterior wings pale tawny 

 white, largely clouded with pale smoky gray at the apices. Fringes 

 concolorous with the adjacent portion of the wings. Beneath as 

 above, except that the gray shades are deeper and more uniform in 

 tint, and the spot on the anterior wings more contracted in area. 

 Expanse 0/ wings, 0.85 inch. Length of body, 0.30 inch. 

 Habitat. — California, (Coll. Edwards, Behr, Behrens, etc.) 

 This species is found in woods round the bay of San Francisco. It 

 may be readily distinguished from B. Faustinula, by the larger apical 

 cloud on the posterior wings, by the band on the anterior wings not 

 reaching the costa, and by its smaller size. It is also much more 

 abundant. 



