266 BULLETIN UNITED STATES GEOLOGICAL SURVEY. \Yol. YI. 



tions occasionally receive this name. I am, myself, perhaps, responsi- 

 ble for part of this indecision, for some years ago I was not suie which 

 of our species were described by Guenee under Xylopliaski cariosa and 

 sectilis, the description of the former being drawn up from a poor speci- 

 men. Allowing for this, Gueuee's description covers our common species, 

 while the phrase "La cote est entierement claire," seems to me decisive, 

 and to refer to the white shaded costa of the form which I call cariosa. 

 As to the British Museum Lists, they contain descriptions of several 

 species of North American Hadenoid forms under various genera, which 

 cannot be at all made out from published data and they are accordingly 

 omitted here. Finally, I believe the Dryobota paviae of Dr. Behr to be a 

 later name for Radena curvata. It is possible that a few of the forms 

 included here may be separated under other genera. The above list 

 contains Hadenoid forms agreeing in having naked eyes and unarmed 

 tibiae. The thoracic tufts are usually present. They appear to be very 

 small and confined to the base of the thorax in confederata, which is an 

 aberrant form, nearest, perhaps, to our fractilinea, leading to subtropi- 

 cal species having somewhat the aspect of Prodenia. The abdominal 

 tufts are wanting in Ollgia, and the frail species resemble Caradrina, 

 which latter genus, by the way, does not seem to have strong characters. 

 The abdomen remains conical in Oligia, however ; it is flattened in rasi- 

 lis, which on this and other accounts I would not keep under Hadena. 

 The abdominal tufts are also very difficult to perceive in devastatrix, 

 which latter, otherwise, is a typical Hadena. They are of very different 

 development in the several forms. The group needs a careful study 

 ■with the forms of the genitalia taken into account and a strict compari- 

 son made with the European forms. The present list, however, appears 

 to me more exact than any I have yet published (and no other author 

 has yet attempted to arrange our species), and gives an approximate 

 basis on which to compare the representation of the genus in Europe 

 and America. Staudinger gives 53 species in 1871, belonging to the 

 European fauna. The present list gives 79 names. 



POLIA Treitschke. 



The following is a list of the North American species which I refer to 

 the European genus Folia. Mr. Morrison's confragosa and speciosa are 

 yet unknown to me. I have identified perquiritata of this author; it is 

 not a Folia, but an Agrotis, allied to the European A. speciosa and pos- 

 sibly identical with it. Moeschler records Agroiis speciosa from Labra- 

 dor. Agrotis perquiritata has been taken in Northern New York and at 

 the camp of the Entomological Club on Mount Washington. For the 

 present I keep Facliypolia atricornis as generically distinct. The an- 

 tennne of the male are sti'ongly bipectinate ; they are serrate in acutis- 

 sima and mediaUs. A comparison with the European species is needed 

 to establish the limits of the groui), a>id for want of comi^lete foreign 



