Levi, Herbert W. Predatory and Sexual Behavior of the Spider Siccarius 
(Araneae: Sicariidae) . 320 
Levi, Herbert W. The Spider Genus Billima Simon. 340 
McCrone, John D. Biochemical Differentiation of the Sibling Black Widow 
Spiders, Latrodectus mactans and L. variolus . 212 
MacLeod, Ellis G. Studies on the Systematics of the Berothidae, Part I: 
A Redescription of the Genus Sphaeroberotha Navas, with a Critique 
of the Taxonomic Characters Used in the Berothinae (Neuroptera). 
342 
MacLeod, Ellis G. and Phillip A. Adams. A Review of the Taxonomy 
and Morphology of the Berothidae, with the Description of a New 
Subfamily from Chile (Neuroptera). 237 
Mickel, Clarence E. The Female Sex of the Mutillidae Subfamily Eotil- 
linae (Hymenoptera) . 234 
Mockford, Edward L. The Electrentomoid Psocids (Psocoptera) . 118 
Pinter, L. J. Species of Widow Spiders in Northern Argentina ( Latro- 
dectus. : Theridiidae) . 290 
Porter, Charles C. A New Genus of the Trachysphyrus Group from 
Southern Brazil (Hymenoptera, Ichneumonidae) . 218 
Porter, Charles C. A New Species of Trachysyhyrus from the Andes of 
Ecuador (Hymenoptera, Ichneumonidae). 27 
Reis kind, Jonathan and Herbert IV . Levi. Anatea, an Ant-Mimicking 
Theridiid Spider from New Caledonia (Araneae: Theridiidae). 20 
Roth, Louis M. The Evolutionary Significance of Rotation of the Ootheca 
in the Blattaria. 85 
Talbot, Mary. Slave-Raids of the Ant Polyergus lucidus Mayr. 299 
Watkins, Julian F. II and Carl W. Rettenmeyer. Effects of Army Ant 
Queens on Longevity of Their Workers (Formicidae: Dorylinae). 
228 
Willey, Robert B. and Ruth L. Willey. Barriers to Gene Flow in Natural 
Populations of Grasshoppers. 1. The Black Canyon of the Gunnison 
River and Arphia conspersa. 42 
Wilson, E. O., Carpenter, F. M. and W. L. Brown, Jr. The First Meso- 
zoic Ants, with the Description of a New Subfamily. 1 
354 
