New Exocrine Gland in Novomessor, 
32 
New Genus and Species of Conioptery- 
gidae from New Mexico, 192 
New Records for Thvreodon from South 
Texas, 304 
New Species of Platythyrea, 216 
Notonecta, 319 
Novomessor, 32 
NUGONIONEURI DAE, 337 
Nugonioneura problematica, 337 
Oboria, 349 
Observations on the Nesting Behavior 
and Prey of Gorytine Wasps in Trini- 
dad. 324 
OP1STHOCLADUS ARCUATUS, 342 
OPISTHOCLADUS STRICTUS, 344 
Oreodera glauca, 258 
Owlflies, 1 
Permembiidae, 359 
Pennembia delicatula, 359 
Permian Insects, 336 
Permithonidae. 352 
Permoneura lameerei, 373 
Permoneuridae, 373 
Platythyrea prizO. 216 
Polymorphism in Formica neorufibar- 
bis, 180 
Pompilidae. 263 
Predation as a Selection Factor in the 
Mating Strategy of the Jumping Spi- 
der. Phidippus johnsoni, 243 
Prosthoporus. a New Bolivian Genus 
of the Subtribe Lymeonina. 271 
PROSTHOPORUS TERAM. 274 
PSOROPTERIDAE. 345 
PSOROPTERA CUBITALEA. 345 
Respiratory Significance of the Thora- 
cic and Abdominal Morphology of 
Three Corixidae, Diaprepocoris, Mi- 
cronecta, and Hesperocorixa, 132 
Response Strategies of Adult Male 
Schizocosa crassipes During Agonis- 
tic Interactions, 94 
Sagenista brasi/iensis, 329 
Schizocosa crassipes, 42, 94 
Sheimia sojanensis, 363 
Social Organization of Male Populations 
of Centris pallida, 121 
Some Aspects of the External Morphol- 
ogy of Larval Owlflies, 1 
Spider Genus firms, 63 
STANGEPELMA ARGENTINUM, 188 
Structure and Relationships of the Upper 
Carboniferous Insect, Eucaenus oral- 
is, 223 
Studies on Neotropical Pompilidae. X. 
Supplementary Notes, 263 
Swimming Ability of Notonectidae, 
319 
Thvreodon laticinctus, 305 
Thvreodon niger, 305 
Tinus palictlus, 73 
Tinus PRUSius, 73 
Tinus ursus, 75 
Tinus, western hemisphere 
Tococladidae, 341 
Technique for Observing the Behaviour 
of Small Animals under Field Condi- 
tions, 210 
TRACHOPTERYGIDAE, 356 
TRACHOPTERYX MARTYNOV], 356 
i'/u lodes, 1 
382 
