PSYCHE 
A JOURNAL OF ENTOMOLOGY 
Established in 1874 
Vol. 64 June, 1957 No. 2 
TABLE OF CONTENTS. 
Tertiary Flies from Colorado and the Baltic Amber. F. M. Hull . 37 
The Organization of a Nuptial Flight of the Ant Pheidole sitarches 
Wheeler. E. 0. Wilson 46 
A Revision of the Nearctic Species of Tomoderus (Coleoptera: 
Anthicidae). F. G. Werner 51 
The Nest of an Anomalous Colony of the Arboreal Ant Cephalotes 
atratus. N. A. Weber 60 
Some New Species of Robber Flies (Diptera: Asilidae). F. M. Hull 70 
Some New Species of Robber Flies (Diptera: Asilidae). F. M. Hull 70 
