INDEX TO 
All new genera, new species and new 
Achroblatta, 296 
Additional Insects in Pennsylvania 
Concretions from Illinois, 267 
AGAMENON IPHIMEDEIA, 75 
Anchoblatta, 296 
Araneus diadematus , 12 
Arphia conspersa, 330 
Barriers to Gene Flow in Natural 
Populations of Grasshoppers. II. 
Maintenance of Narrow Hydrid- 
zones Between Morphs of Arphia 
conspersa on Black Mesa, Colo- 
rado, 330 
Behavior of a Stinkbug, Euschitus 
conspersus Uhler (Hemiptera: 
Pentatomidae, 215 
Biolleya, 296 
Carabid antenna cleaner, 51 
Chrysopa carnea, 107 
Clepsis unifasciana, 38 
Colonization of the Northeastern 
United States by the Two Palae- 
arctic Moths, 38 
Croesia forskaleana, 38 
Differentiation of the Carabid An- 
tenna Cleaner, 51 
Dinoponera grandis, 1 
Displacement of Native Ants Species 
by the Introduced Argentine Ant, 
Iridomyrmex humilis Mayr, 257 
Dunbaria, 306 
Euschistus consperus , 215 
Fine Structure of Thread Connec- 
tions in the Orb Web of Araneus, 
12 
SUBJECTS 
names are printed in capital type. 
Flights of Formica dakotensis, 169 
Formica dakotensis, 169 
Heliocausus larroides, 166 
HERDINA MIRIFICUS, 291 
HERDINIDAE, 287 
Hypsosinga alberta, 254 
Larva of Heliocausus, 166 
LYCODEMAS ADOLESCENS, 268 
Male Genitalia of Blattaria, 84, 180, 
319 
Mating Behavior of Parcoblatta ful- 
vescens (Saussure & Zehntner) 
(Blattaria, Blattellidae) , 319 
Mechanisms Controlling Copulatory 
Behavior in Wolf Spiders, 150 
Microtopus Casey in the United 
States, 32 
Nephila clavipes, 123 
New Scenopinidae from Bermuda, 
49 
Notes on the Phasmatodea of the 
West Indies, 67 
NOTORACHIS WOLFFORUM, 273 
Oligotypus makowskii, 286 
Oonops balanus, 204 
Oonops castellus, 206 
Oonops GERTSCHI, 211 
Oonops in Panama and West Indies, 
203 
Oonops ronoxus, 212 
Orb-weaver Genera Singa and 
Hypsosinga in America (Araneae: 
Araneidae), 229 
353 
