20 HYMENOFTERA OF AMERICA. [I'AUT I. 



.May be a variety of the preceding. 

 Hab. Antilles. 



8. Z. piriformis Spin. — J . Ater, nitidus, pnnctatns, sed nihilominus 



1 litus ; clyj et froute planatis; illo apice subemargiuato, margine 



punctato, de reliquo laevi, substriato ; pronoto valde cristato-inarginato, 

 sed baud bidentato, postscutello et metanoto velutinis, argenteo-sericeis, 

 lioc parum striato, supra iitrinque laevi; petiolo ovato-inllato, liitido, 

 punctnlato, margine tiavo-limbato ; secundi segmenti margine subja- 

 ceute prodneto : reliquis valde puuetatis ; antennis subtus apicem versus 

 ferrn tibus ; alis byalinis, costa angaste nigra; cellula 2" 



i.ili. Longit 0.017. — Variat secando segmento fiavo-limbato. 



Itus piriformis Spin. Ann. Sou. Ent. Fr. X. 1S41, 135. — Sauss. Vespides, 

 I. 15, 12. 

 Zelhus binodis Sauss. (per erroreua) Vespides, I, pi. viii, fig. 8. 



Hab. Cayenne. 



This spe< markablc for its body appearing smooth, 



although punctured, having the punctures apparently effaced. I 

 (•annul say with certainty if this is really the species described 

 by Spinola. The 2d segment of the abdomen is swelled suddenly, 

 and globular, a character which distinguishes this Zcthus from Z. 

 rnus. 



9. Z. fi a tenuis Sauss.— Niger, pnnctatns; pnnctia 2 frontalibus 

 flavis. Prouotum paulum cristato-inarginatum. Scutellum convexum, 



o partitum. Metanotuin minus punctatum, sericeum, clunibus 



2 convexis, sulco profundosejunetis et ntrinqne carina vertical] spatium 

 striatum margiuaute instructia (non .sunt ilia? carina? laterales inetanoti, 

 s '" 1 fa,i " i P°stica -his ovatus, sat. brevis, pnnctatns. margine 

 Have; abdominis secundum segmentum distincte petiolatum, ovato-dila- 

 tatum. Alse infuscatse, costa nigra, apice et postice parum obscure. 



• lypeus in dimidia parte inferiore flavus margine infero recto, dentibus 

 2distanlibus nigris; antenna? subtus, apicem versus Havre. Longit 0.016. 



Zethus fraternus Sauss. Vespides, I. L6, 14. 1852; Revue Zool. X, 1858, 

 163. 



Hab. Brazil (lower provinces). Typus in museo Saussuriano. 



The swelling of the petiole is a little flattened, and wider than 

 in Z. piriformis; the second segmenl is more briefly pediculate, 

 more gradually swelled and less globular. The body is more 

 strongly punctured. 



