138 BULLETIN 44, UNITED STATES NATIONAL MUSEUM. 



1870. Saund., Can. Eut., ii, 75, Mamcatra. 



1874. Ort., BulL Buff. Soc. Nat. Sci., ii, 14, Hadena. 



amputatrix Fitch. 

 1856. Fitch, 3d Kept. Ins. N. Y., 425, ffadcna. 

 1869. Riley, 1st Rept. Ins. Mo., 87. Hadena. 

 1873. Grt., Bull. Buff. Soc. Nat. Sci., i, 108, pr. syn. 



amtcaX Harr. 

 1862. HaiT., Inj. Ins., Flint ed., 4.50, f. 222, Hadena. 



1873. Grt., Pioc. Bost. Soc. N. H., xvi, 241, pr. syn. 



Habitat. — [Jiiited States east of the Rocky Mountains; New Mexico; 

 Colorado, June to September. 



X. albina Grt. 



1874. Grt., Bull. Buff. Soc. Nat. Sci., ii, 157, Hadena. 



1881. Grt., Bull. U. S. Geol. Surv., vi, 263, an var. castanea. 



Habitat. — California. 



The "type" is in the British Museum; but I am not sure it is a fair 

 representative of the species Mr. Grote meant to describe. It seems to 

 be really a form oi' castanea, as Mr. Grote suggested; but the specimen 

 in the Tepper collections, also marked "type" by Mr. Grote, is more 

 nearly allied to arctica, and is a good species as shown in my Revision. 

 I prefer still to consider the form described by me as the species in- 

 tended by Mr. Grote, the more so as I could not by comparison of the 

 sexual characters of the British Museum "type" decide the question 

 positively. 



X. pluviosa Wlk. 



1865. Wlk., C. B. Mus., Het., xxxiii, 725, Euroia. 



castanea Grt. 

 1874. Grt., Bull. Buff. Soc. Nat. Sci., ii, 156, Hadena. 



cymosa Gi't. 

 1881. Grt., Papilio, i, 34, Hadena. 

 1881. Grt., Papilio, i, 59=castanea. 

 1881. Grt., Bull. Geol. Surv., vi, 263 ^castanea. 



Habitat. — California in April and May; Washington; Yancouver. 



The types of all the names are in the British Museum. Mr. Walker's 

 2)Juviosa is exactly like cafifanea. Another " type" of castanea is in the 

 Tepper collection. 



X. occidens Grt.* 

 1878. Grt., Bull. U. S. Geol. Surv., iv, 177, Hadena. 



Habitat. — Nevada; Colorado, August; Sierra Nevada, California. 

 The type is in the British Museum. 



X. perpensa CUt. 



1883. Grt., Can. Ent., xiii, 229, Hadena. 



Habitat. — Arizona; New Mexico. 



The type is in Mr. Neumoegen's collection. 



