U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 104, PLATE 18 



1. Push-up of Peltoirupes youngi, new species, surrounded by the typical surface 



litter which the female used to provision the larval cell. 



2. Fecal tube constructed by the larva of P. youngi. This tube prevented the 



loose sand from caving in on the larva as the litter was eaten. 



