264 BULLETIN 44, UNITED STATES NATIONAL MUSEUM. 



responsible for Mr. Grote's synonym, by insisting", correctly enougb, 

 that Mr. Morrison's type in the Tepper collection had unarmed fore 

 tibiiie as described. Many specimens examined since, prove that this 

 Avas a defect in the type and not characteristic of the sx)ecics. 



P. expallidus Grt.* 

 1882. Grt., Papilio, ii, 185, Plagiomimicus. 

 Habitat. — Montana; Colorado, Platte Canon in AnjLjnst. 

 Tyx^es are in the National Museum and in the Neumcegen collection. 



P. viridifera Grt. 



1882. Grt., Can. Ent., xiv, 217, Zoilieca. 



1891. Smith, List Lepidoptera, 53, Plagiomimicus. 



Habitat. — Arizona. 



The type is in Mr. Neumcegen's collection. The species has a curi- 

 ous color resemblance to the species of Zotheca; but in head and feet 

 structures the reference here is justified. 



Genus FALA Grt. 

 1875. Grt. Proc. Ac. Nat. Sci. PliiL, 1875; 425. 



F. ptycophora Grt.* 



1875. Grt., Proc. Ac. Nat. Sci. Phil., 1875, 426, Fala. 



1882. Grt., 111. Essay, 64, pi. 3, f. 36, Fala. 



1883. Grt., Can. Ent., xv, 74, Fala. 



Habitat,— California. 



The type is in the British Museum. It is a curious mottled species, 

 with heavy body and primaries, in which the costa is depressed and 

 the apices are distinct. A specimen in the National Museum had 

 long puzzled me as to its location, as I could not make it function sat 

 isfactorily with Mr. Grote's descriptions. 



Genns ACOPA Harv. 

 1874. Harv., Bull. Buff. Soc. Nat. Sci., Ii, 273. 



A. carina Harv^.* 



1874. Harv., Bull. Buff. Soc. Nat. Sci.,.ir, 279, Jcojm. 

 1878. Grt., Can. Ent., x, 67, Acopa. 

 1883. Grt., Can. Ent., xv, 77, Acopa. 



Habitat.— Texas, in October. 

 The type is in the British Museum. 



A. perpallida Grt. 

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



Habitat. — Kansas. 



The tyi)e is in the British Museum. 



•' 



A. incana Hy. Edw. 

 1882. ITy. Edw., Papilio, ii, 128, Acopa.. 



Habitat. — Arizona. 



The type is in Mr. Neumoegeirs colh'clion. 



