PSYCHE 
A JOURNAL OF ENTOMOLOGY 
Vol. 75 March, 1968 No. 1 
CONTENTS 
Studies on Neotropical Pompilidae (Hymenoptera) IV. Examples of 
Dual Sex-Limited Mimicry in Chirodamus. Howard E. Evans 1 
Nesting Biology of the Social Wasp Microstigmus comes (Hymenoptera, 
Sphecidae, Pemphredoninae) . Robert IV. Matthews 23 
Flights of the Ant Polyergus lucidus Mayr. Mary Talbot 46 
Chromosomes of the Pycnoscelus indicus and P. surinamensis Complex 
(Blattaria: Blaberidae: Pycnoscelinae) . 
Louis M. Roth and Samuel H. Cohen 53 
The Genus Ischnothyreus (Araneae, Oonopidae) in Central America 
and the West Indies. Arthur M. C bickering 77 
The Chromosomes of Three Australian Dacetine Ant Species (Hymenop 
tera: Formicidae). R. H. Crozier 
87 
