no. 2374. NEW WASPS OF SUBFAMILY NYSSONINAE—ROHWER. 405 



no turn bilobed in the genus Paranysson Guerin. Turner considers 

 Guerin's genus to be the same as Ilelioryctes Smith and makes it 

 the type genus of a subfamily containing ZoypMum Kohl, Serico- 

 phorus Smith, and Splwdrotes Kohl. The subfamily Paranyssoninae 

 is not closely allied to Nysson, and it is evident that the group of 

 North American species which Cresson assigned to Paranysson needs 

 a new name. As none of the synonyms of Nysson are available, I 

 propose the name Zanysson for Paranysson Cresson, not Guerin. 



In the bilobed metanotum this subgenus differs from all other 

 groups of Nysson, and it may later be desirable to consider the group 

 of generic value. The male of Metanysson has not been described, 

 but from the other North American 3 groups the male of Zanysson 

 can easily be distinguished by the greater number of teeth on the 

 apical tergite. The venation of Zanysson is the same as Brachystegus. 



Key to North American species of subgenus Zanysson. 



Besides the species here treated there are in the National Collection 

 males, which appear to represent three other species, but inasmuch 

 as they are not associated with females and there is some doubt as 

 to the value of the number of teeth on the apical tergite it seems best 

 to leave them undescribed until more material is available. 



1. Legs black fuscipes (Cresson). 



Legs largely ferrugineous 2. 



2. Males 3. 



Females 5. 



3. Third antennal joint but little shorter than the fourth; apical tergite very coarsely 



sculptured as is also the last; median teeth of apical tergite large and close to the 



lateral ones; fourth tergite with a yellow spot aureobalteatus (Cameron). 



Third antennal joint not more than half as long as fourth 4. 



4. Apical tergite with four apical teeth; posterior face of the propodeum with tbe 



median carinae complete, well defined texanus (Cresson) . 



Apical tergite with five apical teeth; posterior face of the propodeum with the 

 median carinae obsolete below plesia, new species. 



5. Pygidium distinctly bipunctate, large pits and smaller punctures; dorsal aspect of 



propodeum with a distinct inclosure; third antennal joint less than half as long 



as fourth plesia, new species. 



Pygidium nearly uniformly striato-punctate (punctures confluent forming ridges) 

 but occasionally there may be a few pits at the base; third antennal joint more 

 than half as long as the fourth texanus (Cresson). 



NYSSON (ZANYSSON) FUSCIPES (Cresson). 



This species is confined to the western coast states. The United 

 States National Collection contains two males, one from the Fox 

 collection, the other collected by J. R. Horton on Helianthus at 

 Lindsay, California, August 29, 1911. 



s The Cubean arrnatus Cresson has only two teeth on the apical tergite. 



