1885.] NATURAL SCIENCES OP PHILADELPHIA. 179 



strong, well-defined silver mark, straight nearest to base, hooked 

 outwardly ; this mark is quite different from the nearly straight 

 insignificant mark of Ampla ; above the outer edge of the dark 

 central patch, the transverse posterior line is double and incon- 

 spicuously continued towards the costa ; the transverse anterior 

 line does not extend beyond the central patch, only at the place 

 where it should terminate on the costa, is a dark spot. A small 

 dark inconspicuous apical spot. 



Secondaries orchrey brown, shading into smoky towards outer 

 margin. 



Uab. — Colorado. One example, Mus. Strecker. 



