206 THE CANADIAN ENTOMOLOGIST. 



than the European Atethmia xerampelina, and has different shaped, more 

 dentate primaries. Eyes naked, tibiae unarmed. Eucirroedia pampi?m 

 (Guen.) has the colors of Jodict. I would restrict Xanthia in North 

 America to the species X. togata (silago), also found in Europe ; the 

 genera might follow in this manner : Glaea, Xanthia, jfodia, Eucirroedia, 

 Scoliopteryx, Scopelosoma, Lithophane. I, at one time, identified X. 

 aurantiago Guen., but have now no specimens before me. 



Scopdosoma. 



The North American species are now eight in number, sidus 

 Guen. being unknown to me, unless the latter is = vinulenta. The 

 difficulty has arisen in that Walkeri varies in color, so that certain 

 specimens seem to accord with M. Guenee's comparative description of 

 sidus as well as vinulenta does. However, I am persuaded that it is more 

 probable that sidus is founded on an individual of vinulenta, as I at first 

 believed, and I only wait some more positive data to restore the name. 

 It is necessary for the purpose to compare M. Guenee's type. The N. 

 Am. species are then as follows : 



Pettiti Grote, Graefiana Grote, ceromatica Grote, vinulenta Grote 

 (= sidus ?), Walkeri Grote, Morrisoni Grote, devia Grote. No species 

 are yet known from California. 



Litholomia, n. g. 



In the shape of the primaries there is a marked resemblance to Litho- 

 phane and Scopelosoma, the costal margin being straight. The inner 

 margin is straight and nearly as long as the costal, the exterior margin 

 being slightly and evenly rounded ; the wing is nearly of an even width 

 throughout. The tibiae are unarmed. The eyes are naked, lengthily 

 lashed. The head is sunken, or oppressed. The male antennae simple, 

 ciliate beneath. The thorax is somewhat rounded and full, approaching 

 Lithomia, not quadrate as in Lithophane and Calocampa. The abdomen 

 is untufted, somewhat flattened, with a dorsal carina, not as rounded as 

 in Lithomia. The palpi are short, not exceeding the front. Ornamenta- 

 tion like Lithophane and allied genera. 



Litholomia napaea. 



Antennae white at the base. Cinereous ; markings distinct. Lines 

 double, black, distinct, perpendicular. T. a. line thrice waved, com- 

 ponent lines divaricate, equally distinct. Orbicular shaded with white, 



