358 ENTOMOLOGICAL NEWS [Oct.. *TO 



Of these names, however, he deems the following worthy of 

 special mention : 



"Ab. i farcasi. Fore wing darker and more varigated." 



"Ab. 2 oregonica. Greyer ; fore wing more thickly irrorated with 

 pale brown." 



"Ab. 3 treitschkei. Fore wing with medial part of subterminal line 

 defined by prominent dentate black marks on inner side." 



"Ab. 4 albifusa. Fore wing tinged with rufous and with white suf- 

 fusion on costal area and beyond post medial line, the subterminal line 

 with prominent dentate black marks on inner side at middle." 



The form figured on p. 29 as trifolii $ , agrees very nearly 

 with the uniformly marked type usually found in our collec- 

 tions, except that it seems to be rather darker than our ordi- 

 nary forms. There is, however, a still darker form occurring 

 in the Northwest, which has been quite generally called crc- 

 gonica in collections largely on my authority. 



In rearranging my series of Mamestra I set aside all the 

 examples of trifolii for closer study, and Dr. Barnes was good 

 enough to send me his material the whole small enough for 

 so common a species. During his visit to me, Mr. F. H. Wol- 

 ley Dod marked in my box two examples, one as representing 

 albifusa Wlk., the other as representing oregonica Grt., both in 

 agreement with Hampson's memoranda, and, as to the albi- 

 fusa, the most extremely contrasting specimen in my collection. 



In separating out this material I find I have almost no Pacific 

 Coast specimens, and, on close examination, the single example 

 of oregonica as named by Dod is obviously not trifolii, although 

 the name may be correct. In other words, I am not sure of my 

 oregonica, although it agrees generally with the description. I 

 am certain, however, that the specimen represents a good spe- 

 cies, and one that I propose to fix by figuring the male sexual 

 structures, so that if at any time later typical oregonica become 

 available for dissection, they can be compared structurally, if 

 not autoptically, with the material now before me. 



After separating the material under examination as nearly 

 as possible into two series, I examined the $ abdomen of ex- 

 treme forms and found two strikingly distinct structures. The 

 contrasting form, albifusa, has at the base of the abdomen a 



