846 AMERICAN LEPIDOPTERA. 



Section III contains all the rest of our species, and the table, 

 modified to contain only tliose forms, reads as follows: 



C. Hind wing fuscous, with the, veins reddish imiiiaculalH. 



D. Hiud wings giayisii, more or less tinged with fuscous, and with diffused dark 



snbterniinal band. 



a. Forewing witii a black bar from costa at subterminal line-- -piirpin'ca. 



b. Forewing without black bar from costa at subterminal line. 



al. Forewing with the orbicular figure — of — 8-shaped aniei'icana. 



bl. Forewing with the orbicular quadrate, open above pnta. 



E. Hind wings yellowisli-white. 



a. Forewing with series of small black spots on inner side of subterminal 



line ralla. 



b. Forewing without series of small black spots on inner side of subterminal 



line. 



al. Forewing with the markings dark brown iuops. 



61. Forewing with the markings pale rufous decipiens. 



Of these species immaculata Morr. and amerieana Morr. are 

 autoptically unknown to Sir George. The type of amerieana is in 

 the Tepper collection, and is a poor example of the European lota; 

 the type oi' immaculata has disappeared. It should be in the collec- 

 tion at Cambridge according to the statement in Morrison's descrip- 

 tion ; but it is not now to be found, and there is no record of what 

 has become of it. The description leaves a doubt as to whether the 

 species really belongs here. 



In arranging the material in my collection it became obvious that 

 there were several new forms involved, and these were characterized 

 as preliminary to a more careful study of some of the structural 

 characters of the series. 



On both structure and maculation three series are obvious in the 

 genus, and they are not even closely related, although for conven- 

 ience they may be held together for the present under one generic 

 name. 



The first series is the equivalent of Hampson's Section II, with 

 the male antennse minutely serrate and fasciculate. This serration 

 is variable in the species, never very strongly marked, and the fas- 

 ciculation is as diverse, leaving a very small margin between the 

 series I, and some forms of series II. However, in addition to this 

 antennal character, all the species have trigonate primaries with 

 arched costa, distinct ai)ices and obliquely arcuate primaries on 

 which the s. t. line is continuous and preceded by a darker shading ; 

 characters which are obvious in both sexes. 



