U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. XVI PL. LXXVII 



1-3. Potamocarciniis nicaragnensis. 

 6. E. grunxdaia. 



4. '■>. Epilohncera haytenmn. 



'i. Trichoclarti/liis qidnqiii'detitatits. 



