126 Journal New York Entomological Society. [Vol. xxvu. 



Autographa celsa, race sierra n. race (from type). 

 Abrostola parvula B. and McD. 

 Abrostola microvalis n. sp. (from type). 

 Autographa magnified n. sp. (from type). 

 Autographa celsa Hy. Edw. (from type). 



IDIOCERUS COGNATUS FIEBER, ESTABLISHED IN 

 NORTH AMERICA. 



By Chris E. Olsen, 

 West Nyak, N. Y. 



In 1908 the writer collected several specimens of an Idiocerus 

 belonging to a species unknown to our fauna and submitted these to 

 Mr. E. P. Van Duzee for determination. They came back labelled 

 " Idiocerus sp. unknown to me." Mr. Van Duzee further remarked 

 in an accompanying note that as soon as time permitted he would 

 look up regarding these. Since then specimens have been collected 

 from time to time in various places. On October 10, 1916, by sweep- 

 ing the lower branches of a white poplar {Populus alba), over one 

 hundred specimens were collected in half a dozen sweeps of the net. 

 A great many more could have been taken from this tree, of which 

 there are only two in the immediate neighborhood. Nearly all were 

 females, only five males in the lot. 



Coincidentally with this Messrs. Harry B. Weiss and Edgar L. 

 Dickerson presented specimens of this same Idiocerus species which 

 they had also taken abundantly on Populus alba in New Jersey, and, 

 contemplating the working out of its life history, its identity was 

 obviously desired. It was at first thought to be a new species, but in 

 looking up some European literature several descriptions were met 

 with which applied very well. For the present and until specimens 

 can be obtained from Europe to compare with our American form, 

 it will be safe to call it Idiocerus cognatus Fieber = I. distinguendus 

 Kirschbaum. 



As far as can be ascertained from descriptions and figures it 

 resembles somewhat /. rufus Gillette and Baker and I. rufus var. 

 cingulatus Ball, but in the structural characters of the face and geni- 



