HESPERIOIDEA OF AMERICA 15 



5. Third joint of palpi long slender and vertical Antennae 



short with the club blunt Group B 



Third joint small or antennae with a slender apiculus 



Group C 



Cell of primaries two-thirds as long as wing, usually with a 

 recurrent vein or a vestige of it Group D 



Subfamily PYRRHOPYGINAE 



This subfamily includes a large number of South and Central 

 American species of which only one, araxes, occurs within our 

 territory. The large antennal club, bent back along the shaft 

 or recurved, is typical of all the species. In other respects their 

 structure agrees to a great extent with that found in group A 

 of the Hesperiinae. The cell of the primaries is apically pro- 

 duced with the discocellulars outwardly concave, and is about 

 two-thirds as long as the wing. The discocellulars are weak, but 

 clearly traceable. Vein 5 is approximately intermediate in the 

 primaries, and absent in the secondaries, though found in a few 

 exotic genera. 



Araxes has been included in the genus Pyrrlwpyge by all writ- 

 ers with whose works I am familiar, but the difference in habitus 

 and the form of the secondaries have led me to remove it. Wat- 

 son's diagnosis of his genus Microceris (P. Z. S. 1893, 15) dif- 

 fers m only a few points from the structures of araxes, but the 

 type, variicolor, judging by the original description and figure, 

 is not at all closely related. I am therefore basing a new genus 

 on the points of difference between araxes and Watson's de- 

 scription of Microceris. 



Genus APYRROTHRIX gen. nov. 

 Similar to Pyrrlwpyge. Differs from that genus in the more 

 gently curved costa and more prominent apex of the primaries 

 and the form of the secondaries. In Pyrrlwpyge these appear 

 to be longer through the cell than along the inner margin, and 

 the outer margin is even or slightly concave between veins 2 and 

 7. The abdomen usually equals or surpasses the anal angle of 

 the secondaries. In araxes the secondaries are broad and full, 

 and surpass the abdomen. The outer margin is deeply crenu- 

 late, produced between veins 2 and 4 in the male and conspicu- 



