157 



to be generally preferred. But these discrepancies are mostly trivial 

 and do not affect the principal result of our respective criticisms. 

 They are in part owing to a diflferent conception of the genera Epi- 

 one and Eurymene ; in part also to our here erroneous extension of 

 Numeria. The most important discrepancy has arisen in the ge- 

 nus Caberodes. Mr. Walker's seven species of this genus seemed to 

 us referable to two ; while Dr. Packard assumes them to belong to 

 four species. These species were at any rate very closely allied, and 

 the single specimens by which the majority of them were repre- 

 sented, afforded us no grounds for separation at the time. With 

 a more critical knowledge of the genus, Professor Packard's deter- 

 minations must be accepted. It is, however, not impossible that 

 some changes may have taken place in the collection during the 

 interim of five years between our own and Professor Packard's visits. 

 This becomes probable when we see that a few of Mr. AValker's fre- 

 quent re-descriptions of the four species, Endropia hypochraria, 

 H.-S., Macaria grauitata, Guenee, Acidalia euuclcata, Giienee, and 

 Azelina Huebneraria, Guenee, are not alluded to by Professor P-ack- 

 ard. These species turn up every now and then in unexpected 

 places in the collection and under unrecognisable generic and spe- 

 cific descriptions iij the catalogue, filling, in the Geometridae, the role 

 which Mr. Walker assigns to Lygranthoecia marginata in the Noc- 

 tuidae. For the few species which Professor Packard here recog- 

 nises as distinct, in subversion of our earlier determinations, we 

 trust Professor Packard will furnish descriptions in the expected 

 Monograph of the North American Geometridae. 



Grote and Robinson. Packard. 



1868. 1873. 



Chocrodes translucens = id.= $ Eutrapela clemitaria. 



$ Eutrapela clemitaria. 



Choerodes transferens = id.— $ Eutrapela clemitaria. 



? Eutrapela clemitaria. 



Epione calipusaria belongs to id.= Sicja solfataria. 



Eurymene, 



Epione agyllaria = id. [is a distinct species.] 



Epione calipusaria. 



