153 



ACOPA PERPALLIDA Grt. 



1878, Grt., Can. Ent., X, 68, Acopa. 



1909, Hamp., Cat. Lep. Phal. B. M., VIII, 412, pi. CXXXII, f. 30, Acopa 



incana Hy. Edw. 



1882, Hy. Edw., Pap., II, 128, Acopa. 



1909, Hamp., Cat. Lep. Phal. B. M., VIII, 411, pi. CXXXII, f. 29, Acopa. 



^carina Aiict. (nee Harv.). 



1903, Holland, Moth Book, (partim., plate nee text), pi. XIX, f. 16, Acopa. 



borealis Dyar. 



1917, Dyar, Ins. Insc. Menst., V, 67, dcntifer var., Grypotes. 



form DENTiFER Dyar. 



1917, Dyar, Ins. Insc. Menst, V. 66, Grypotes. 



form PURA B. & L. 



1922, B. & L., Bull. B'klyn Ent. Soc, XVIII, 74, Acopa. 



Specimens have been compared with the types of incana (Brook- 

 lyn Institute) by the senior author, dentifer and borealis (National 

 Museum) by the junior author, perpallida (British Museum and Snow 

 Collection) by Dr. McDunnough. The unique type ( 9 ) of pur a 

 (Barnes Collection) is before the authors. 



The type of dentifer represents a well marked form with consid- 

 erable dark powdering on the primaries, thus approaching, in this 

 character, the normal male of carina. The authors know the form 

 only thru the single male type in the National Museum and two males 

 in the Barnes Collection. 



The type of pura represents a form practically lacking all powd- 

 ering to the primaries ; the basal, s. t., t. p. and terminal lines thin, 

 black, contrasting ; the claviform absent ; the renif orm reduced to a 

 black point. The authors know the form only thru the unique female 

 type. 



The remaining names assigned to the species : perpallida, incana, 

 and borealis, are intermediate between dentifer and pura. 



Scarcely any two specimens are absolutely identical, especially 

 in the amount of suffusion to the primaries, nor are the two types of 

 incana identical with each other. Apparently the same holds true for 

 the types of perpallida. 



