Evans, H. E. A New Family of Wasps. 7 
A New Species of Cephalonomia Exhibiting an Unusually 
Complex Polymorphism ( Hymenoptera, Bethylidae). 151 
Fairchild, G. B. A New Genus and Species of Neotropical Horsefly (Diptera: 
Tabanidae). 193 
Levi, H. tV. The American Spider Genera Spintharus and Thwaitesia 
(Araneae: Theridiidae). 223 
The Spider Genera Cerocida, Hetschkia, Wirada and Cras- 
pedisia (Araneae : Theridiidae) . 170 
Lodos, N. A New Species of Eurygaster and Notes on Some Little Known 
Species of Turkish Pentatomidae (Hemiptera: Heteroptera) . 144 
MacLeod, E. G. A Description of the Male of Sympherobius arizonicus 
Banks (Neuroptera : Hemerobiidae) . 64 
Matthews, E. G. Observations on the Ball-Rolling Behavior of Canthon 
pilularius (L.) (Coleoptera, Scarabaeidae) . 75 
Porter, C. C. A New Genus of the Tribe Mesostenini from Chile (Hymen- 
optera, Ichneumonidae) . 117 
Sweet, M. H. A New Species of Ligyrocoris Stal with a Key to the North- 
eastern Species (Hemiptera: Lygaeidae). 17 
Young, F. N. Two New North American Species of Hydrovatus, with Notes 
on Other Species (Coleoptera : Dytiscidae) . 184 
