REVISION OF STREPSTPTERA PIERCE. 



77 



group with the Ophthalmochlini. If the genitalia of Schistosiphon 

 peckii should prove to have been incorrectly figured and described, 

 and to be of the same character as those of Acroschismus, then Schisto- 

 siphon must become a synonym. If Ilalictostylops spencii is bred 

 and proven to be xenid, as the writer expects will happen, the genus 

 Halictostylops may become a synonym of Ilalictoxenos which is first 

 described in the tables of genera. The classification of the Halicto- 

 phagoidea and Elenchoidea is hardly more than suggested. These 

 superfamilies will prove very fertile in their diversity of forms. 



CORRELATION OF HOST AND PARASITE CLASSIFICATIONS. 



Mengeoidea. 

 Mengeidae. 



Mengea; Germany. 

 Xenoidea. 



Myrmecolacidse. 



Myrmecolax; Ceylon. 



Unknown fossil host. 

 Hymenoptera. 

 Formicoidea. 



Formicidae. 

 Apoidea. 



Prosopidas. 



Prosopis. 

 Andrenida?. 

 Andrena. 



Ilalictus. 



Halictus. 

 Panurgidae. 



Panurginus. 

 Vespoidea. 

 Vespidae. 



Polistes. 



Polistes. 



Polistes. 



Vespa. 

 Eumenidae. 



Odynerus. 



Leionotus. 



Monobia. 

 Bembecidae. 



Bembecinus. 

 Sphecoidea. 

 Sphecidae. 



Sceliphron. 



Priononyx. 



Sphex (Ammophila). 



Proterosphex. 



Hylechthridae. 



Hylechthrus; Europe. 

 Stylopidse. 



Stylops; America, Eu- 

 rope. 

 (?) Halictostylops; Eu- 

 rope. 

 Xenidae. 



Ilalictoxeninae. 



Halictoxenos ; America . 

 < rawfordinae. 



Cra w ford ia ; America. 

 Xeninae. 

 Xenini. 



Xenos; Europe, Ameri- 



ca (?). 

 Acroschismus; America. 

 Schistosiphon; America. 

 Vespaexenos; Asia. 

 Pseudoxenini. 



Pseudoxenos; Europe. 

 Leionotoxenos ; America. 

 Monobiaphila; America. 

 Paraxenini. 



Paraxenos; Europe. 



Ophthalmochlini. 



Sceliphronechthrus; 



America. 

 Ophthalmochlus; Amer- 

 ica. 

 Eupathocera ; America . 

 Homilopinae. 



Homilops; America, 

 Asia (?). 



