PLUME-MOTHS-OF-CEYT.OX. 17 



although I am unable to perceive any distinguishing characters 

 between the male genital armatures of t ongetrosmi and ritbrofhtctyhis-, 

 in both of which forms this latter structure is highly complex and 

 characteristic. In spite of the similarity in the genitalia, however, 

 the difference in habitat appears sufficient to secure asyngamy. 



Observation. — Zeller named this genus Deuterocopus , giving the 

 derivation of the name, and this is obviously not a misprint as the 

 same spelling is seen on pages 31 9 and 415 of Volume VI. of " Linnsea 

 Entomological' Some later authors however (e.g., Hofmann, 

 Deutsche Ent. Zeit., 1898, p. 329; Pagenstecher, Zoologica, 

 XXIX., p. 241) have altered Zeller's name to Beuteroscojym. This 

 latter spelling is quite inadmissible, since a generic name, once 

 published, is inviolable, except where it is a mere printer's error, 

 for which there is evidence. 



1 o - X 1 1 • ° °) . 



7(0)09 



