﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  67, 
  ART. 
  17 
  PL. 
  I 
  

  

  New 
  Larval 
  Nematodes 
  of 
  the 
  Genus 
  Porrocaecum 
  

  

  For 
  explanation 
  of 
  plate 
  see 
  page 
  

  

  