Salduba carinifrons, 245 
Sanitary behavior by Mallos gregalis, 59 
Semidalis tricornis, 190 
Schizocosa ocreata, 231 
Social spider, Mallos gregalis, 59 
Social wasp nest, 299 
Sexual behavior of Leptothorax provan- 
cheri, 1 
Spongilla-fly larvae, 305 
Stabilimenta of orb weaving spiders, 13 
Sternal glands of Polistes, 49 
Stridulation by Leptothorax muscorum, 
199 
Studies on North American Carboni¬ 
ferous insects, 107 
Synonymy of Archisolva, 245 
Synopsis of chrysidid genera of Neo¬ 
tropical America, 75 
Two European species of Chelosloma, 
315 
Trichrysis, 76 
Upper Carboniferous insects from Penn¬ 
sylvania, 107 
Use of artificial nest for studying Polistes 
wasps, 121 
Vespa affinis, 299 
Web and behavior of Wendilgarda, 93 
Wendilgarda, 93 
Wolf spider, 193 
363 
