38 E. B. Williamson and J. II. Williamson 



PLATE I 



Supero-interual views of the left superior appendage of the males of the species 

 of Perilestes. 



1. P. cornutus, Porto Velho, May 2, 1922; 2. P. guianensis, type male; 3. P. remotus, 

 type male; 4. P. magdalenae, type male; 5. P. attenuatus, Porto Velho, May 7, 1922; 

 6. P. Tcahli, type male; 7. P. fragilis, Rio de Janeiro, September 14, 1922; 8. P. solutiis, 

 type male; 9. P. minor, type male. 



