Ko. 2242. MORPHOLOGY OF THE STREP8IPTERA— PIERCE. 463 



Female cephalothorax broader than long, constricted at base, broadest at 

 spiracles, convex from base to spiracles, slightly oblique, but very nearly 

 straight from spiracles to base of head, at which point there is a slight 

 eraargination, thence very oblique to mandibles, apex convex. 



21. Monobiaphila Pierce. 



20. Genus PSEUDOXENOS Saunders. 



LIST OF SPECIES. 



1. P. arvensidis Pierce; parasite of Odynenis arvensh Saussure; 

 Illinois. 



2. P. corcyricus Saunders; parasite of 0. spinipes Linnaeus; 

 Corcyra. 



3. P erynnidis Pierce; parasite of O. erynnys Lepeletier; Florida. 



4. P. foraminati Pierce; parasite of O. foraminatus Saussure; 

 Illinois. 



5. P. fundati Pierce; parasite of 0. fundatus Cresson; Illinois. 



6. P. heydenii Saunders; parasite of O. deflendus Saunders; Epi- 

 rus, Corcyra. 



7. P. histrionis Pierce; parasite of 0. histrio Lepeletier; Florida. 



8. P. hooheri Pierce; parasite of O. verus Cresson; Texas. 



9. P. jonesi Pierce ; parasite of O. colon Cresson ; Louisiana. 



10. P. hlugii Saunders ; parasite of 0. laevipes Shuckard ; Epirus. 



11. P. louisianae Pierce; parasite of O. vagans Sausure; Louis- 

 iana. 



12. P. neomexicana Pierce; parasite of O. toas Cresson; New 

 Mexico, 



13. P. pedestridis Pierce; parasite of O. pedestris Saussure; 

 Illinois. 



14. P. rohertsoni Pierce; parasite of O. histrionalis Robertson; 

 Illinois. 



15. P. schaumii Saunders; parasite of 0. pwrietum, Linnaeus; 

 Corcyra. 



16. P. tigiidis Pierce; parasite of 0. tigris Saussure; Illinois. 



6. PSEUDOXENOS HEYDENII Saunders. 



Erratum : Gen. Insect, p. 27, line 28, read " p. 141 " for " p. 17." The latter 

 page is that given in the separates. 



10. PSEUDOXENOS. KLUGII Saunders. 



Erratum : Gen. Insect, p. 27, line 40, read " p. 142 '" for " p. 18." The latter 

 page is that given in the separates. 



12. PSEUDOXENOS NEOMEXICANUS, new species. 



Plate 72, figs. 2-7. 



Described from a male extracted from the puparium in a female 

 Odynerus toas Cresson var. (determined by Kohwer) collected at 

 Albuquerque, New Mexico, and labeled No. 2934. 



