TABLE OF CONTENTS. IX 



Page. 



Family Xenidse 115 



Genus Xenos 116 



vesparum 117 



jurinei 118 



Genus Acroschismus : 119 



hubbardi 122 



bruesi 124 



nigrescens 125 



pallidus 126 



pallidus texensis 127 



pecosensis 128 



wheeleri 129 



bowditchi 130 



hunteri 130 



texani 132 



rubiginosi 132 



maximus 132 



Genus Schistosiphon 132 



peckii 133 



Genus Vespsexenos 133 



crabronis 134 



moutoni 134 



buyssoni 134 



Genus Pseudoxenos 135 



schaumii 135 



klugii 136 



corcyricus 137 



heydenii 137 



Genus Leionotoxenos 137 



jonesi 138 



louisianse 138 



hookeri 139 



Genus Monobiaphila 139 



bishoppi 139 



Genus Paraxenos 140 



erberi 141 



Genus Sceliphronechthrus 141 



fasciati 142 



Genus Ophtbalmochlus 142 



duryi 142 



Genus Eupatbocera 143 



lugubris 143 



pruinosse 143 



• sphecidarum 144 



sieboldii 144 



Genus Homilops 145 



westwoodii 146 



bishoppi • 146 



ashmeadi 146 



abbotti 147 



Genus Halictoxenos 147 



jonesi 149 



crawf ordi 149 



grsenieheri 150 



versati 150 



