AMERICAN LEPIDOPTERA. 11 



ing. Line for Hue, mark for mark and shade for shade, the two 

 species here grouped may be made to agree, and it is not surprising 

 that they have been considered identical. Yet with the two fornis 

 separated out in a good series of each, their difference is obvious. 

 With single examples there may be difficulty unless reference be had 

 to the male genitalia. 



In grotei the harpes are very broad at base, constricted a little 

 before the middle at the origin of the clasper, where also they curve 

 inward and upwardly, enlarged from the inferior margin, where 

 there is a crescent of saw teeth, and again narrowed to an irregu- 

 larly broken tip. 



It may be said here that Mr. M. V. Slingerland has bred these 

 species as well as antennata which immediately follows, and, while 

 they are similar, the larvse yet bear out the distinctness of the species. 



All the other .species in this series, in which the median lines are 

 not connected, have the reniform more or less flushed with reddish 

 or brown, and the space between the ordinary spots darker, except- 

 ing only virldipallens, which is recognizable by its peculiar greenish 

 gray primaries. 



Antennata tends to the preceding s{)ecies, but is smaller and 

 shorter winged, besides being much brighter in color. In compari- 

 son with its associates it is less contrastingly marked, the median 

 lines more or less incomplete and the reniform narrow, centrally a 

 little constricted. The median shade is not prominent and the pri- 

 maries have a reddish rather than a bluish flush. The harpes of 

 the male are moderately broad and narrow irregularly from both 

 sides to a long, bluntly rounded, very narrow tip. The inferior 

 margin has two irregularly toothed excrescences. The clasper is a 

 short, stout, curved hook. This species has also been confused with 

 grotei, but is abundantly distinct. 



Torrida is blue gray, except for the reddish flush in the reniform. 

 It is longer winged than any other in this group and finds its nearest 

 ally rather in antennata than in tepida to which the brightness at 

 first seems to ally it. This is carried out by the fact that the orbicu- 

 lar extends below the median vein into a suborbicular, as is uni- 

 formly the case in the species allied to grotei. The genitalia of the 

 male resemble those of unimoda in the notched tip, and those of 

 grotei in the toothed, irregular extension from the lower margin of 

 the harpe. The clasper is long, slender, curved arid twisted. 



TRANS. AM. ENT. SOC, XXVII. AUGUST, 1900. 



