Vol. ij Bradley. — The Taxonomy of the Masaricl Wasps 381 



A Working Key for Identifying the Genera of EUPAEAGIINAE and 



MASARINAE5 



(This key does not pretend to present the natural relations of the genera.) 



1. Abdomen strongly petiolate, the first segment elongate, fornietl as in 



Zctlms Plesiozethus and Paramasaris Cameron." 



Abdomen sessile, or the short first segment with a small anterior neek, 

 but not at all Zethus-like 2 



2. Forewings with cells R4 and R^ separate (3 closed submarginal cells) 



Euparagia Cresson. 



Forewings with cells Ri and R-, coalesced (2 closed submarginal cells) .... 3 



3. The first abdominal segment with an anterior neck therefore somewhat 



petiolate Ceramiopsis Zavattari. 



First abdominal segment broad and sessile, as in Vespa , 4 



4. Postscutellum not covered by the scutellum, but produced caudad and 



bifid at apex Masaris Fabrians. 



Postscutellum rounded and more or less covered by the scutellum 5 



5. Sides of abdomen margined, serrate, venter concave; wings plaited long- 



itudinally as in Vespa Celonites Latreille. 



Sides of abdomen not margined, venter convex or nearly flat; wings long- 

 itudinally plaited only in Quartinia 6 



6. Tegulae short, ovate or semicircular, scalelike, not covering the base of 



the scutellum; clypeus produced anteriorly, its margin truncate, in the 



females somewhat rounded 11 



Tegulae elongate and usually acute posteriorly, covering the base of the 

 scutellum; clypeus emargiuate or trilobed at apex 7 



7. Clypeus with its apical border trilobed; m ;^ cu opposite M4 + Cuj 



Jugurtia Saussure. 



Clypeus with its apical border emargiuate 8 



8. In the forewings the mediocubital cross-vein (basal vein) attached oppo- 



site to or basad of M^ + C'u, (submedian vein); third ventral segment 



of males unarmed; larger spur of posterior tibiae not always bifid 9 



In the forewings .the mediocubital cross-vein attached to M4 far apicad 

 of M4 + Cu, ; anterior trochanters of the male unarmed; third ventral 

 segment of the male with a process; larger spurs of posterior tibia 

 bifid Pseudoraasarls Ashmead. 



9. Anterior trochanters of the male armed with a prominent claw or lamella; 



apical segments of the antenna of the females somewhat incrassate, 



but not forming a distinct ovate club; habitat South America 



Trimeria Saussure. 



^' The synoptic tables which follow later are intended to suggest the natural 

 relationships of the genera. They are not readily applicable for pur])oses of 

 identification, and I have therefore prepared this artificial identification key, 

 which I think may be used by any one easily and with certainty as to its mean- 

 ing. At the end is a short working key to North American genera. 



Cameron distinguishes between these two genera on the grounds that in 

 Ple.siozefJms there are only 2 closed submarginal cells, both M3+4 and M^ arising 

 from the cell Rn.5, while in Paramasaris cells R. and R^ are separate; M3+4 arising 

 from cell R5 and Mn from cell R4. Zavattari maintains that Cameron is wrong, 

 and that both genera show the latter condition. In that eventuality it is prob- 

 able that they will have to be united under the -name Paramasaris. 



