264 LEPIDOPTERA OF NORTH AMERICA. 



hence cannot venture on making a more definite diagnosis than 

 that given above. Systematists have divided it, however, into a 

 number of groups, some of which may prove hereafter to be true 

 genera, and the subdivision will assist the student in recognizing 

 individuals. 



i 

 Group Isanthrene. 



Isanthrene Eiibner. Verz. Schmett. 125. 



Body cylindrical. Palpi rather long ; second joint rather short 

 and slender. Antennae slightly pectinated beneath, serrated near 

 the tips. Wings hyaline, more or less bordered with black, and 

 in some species with a black band on the base of the disk. The 

 disk emits Jive veins, discal fold distinct along the whole length. 

 Abdomen linear. Legs rather stout ; median and apical spines of 

 the hind tibiae of moderate length. Especially distinguished by 



the cylindrical abdomen. 



WALKER. 



1. G. chalciope Eiibner. Samml. Ex. Schmett. 23, 235, f. 469, 470. 



Blue Antennae luteous. Abdomen with lateral white dots. 

 Wings limpid, margined with black. Fore wings with a black 

 band. 



Havana. 



WALKER. 



Group Poecilosoma. 



Poecilosoma Hiibner. V. S. 126. 



Body stout, convex, cylindrical, partly metallic. Antennae 

 slender, minutely pectinated to the tips. Wings hyaline, metallic 

 at the base ; fore wings with black tips ; discal fold distinct. 

 Legs moderately stout ; median and apical spurs of the hind tibiae 



very small. 



WALKEE. 



1. O. multicincta Walker. C. B. M. 163. 



Male. Dark brown, linear, cylindrical, partly covered with blue 

 scales. Head with some white hairs above and thickly clothed 

 with white hairs beneath. Palpi white beneath, straight, rather 

 short j third joint very small. Antennae black, moderately deeply 



