In the collection before me are the following species referred to Polia, but in the absence of a series of the European forms I am not clear that they are finally to be lelt in this genus. I have separated under the name of Pachypolia atricornis a stout and shaggy species, taken by my friend, Mr. Westcott, which has strongly pectinated antennæ, a character not accorded by Lederer to the European species, but one which is only doubtfully of generic value. To distinguish these species from Hadena is certainly difficult.