54 HYMENOPTERA OF AMERICA. [PART I. 



carina: on the middle part of the metathorax. Differs from Ghi- 

 cotencatl by its prothorax not crested on the sides, its petiole 

 narrower, etc. It comes very near to Romandinus, but the thorax 

 is shorter anteriorly, more narrowed posteriorly; the petiole 

 narrower, less in Hated, etc. 



Hab. Mexico. The Oriental Cordillera (Mr. Sumichrast). 



49. Z. miscogaster Sauss. — J. Minntus, niger, dense punctatus, 

 cinereo hirtus; clypeo integro, rugoso, piloso ; fronte inter antennas 

 transversira earinato; ocellis in sum mo fronte sitis. Thorax antiee 

 cristatus, carinatus, humeris hand spinosis ; postscutello et metanoto 

 haud rugosis, velutiuis, hoc tenuiter striato, nee earinato, nee distinete 

 foveolato, sed sulco prof undo diviso. Abdomen politum, sericeum ; 

 petiolo elougato, parUm infiato, supra parum uibboso ; seeundo segmento 

 longe pednnculato, ovato-dilalato subdepresso. Caput immaculatum ; 

 pronoti rnargo, macula subaiaris, maculse scutelli et 2 metanoti, lineola 

 utrinque, petioli apex, limbus secundi segmenti, lineolaque utrinque in 

 basi pedunculi, fiava. Ala? subpellucidae, venis fuscis. — Longit. 0.015. 



Z. discombodie similis at minor, et pronoto haud anguloso differt. A Z. 

 Romandino ditfert statura graciliore, petiolo minus punctato et minus tume- 

 facto. 



Zethus miscogaster Sauss. Vespides, I, IS. 18, £, 1852. 



Zethus microguster (per errorem) Sauss. Revue Zool. X, 185S, 163. 



Hab. South America. (Typus in auctoris museo.) 



50. Z. toinodis Fabr, — Gracilis, niger, dense punctatus. Caput latum, 

 dense cribratum ; clypeo rugose cribrato, integro. Thorax cribratus, 

 cristato-marginatus, clvpeo eouvexo, nitido, cribrato; postscutello hand 

 cribrato, postice truncato, sed cantho acuto nullo; metanoto in medio 

 foveolato, carinis prominentibus duabus e postscutelli angulis emergen- 

 tibus ; spatio extra carinam sito utrinque valde striato-plieato ; usque ad 

 canthum lateralem acutuin. Abdominis petiolo polito, tenuiter punc- 

 tato, sat ovato-tumefacto, apice utrinque rlavo-notato; seeundo segmento 

 globoso, longe pedunculato, ubique tenuiter punctato, sericeo setoso, in 

 medio margiue impresso ; tertio, in medio margine paulum producto ; 

 20 et SO tenaissime flavo-marginatis ; reliquis piceis vel ferrugineis. 

 Tibia? 1, 2, ferruginese. Ala? subhyalinse. Longit, 0.017. 



Vt spa binodis Fabr. Ent. Syst. Suppl. 1798, 264.— Coqueb. Illust. Icon. 



Ins. pi. xv, fig. 2. 

 Eumenes binodis Fabr. S. P. 287. 

 Zethus binodis Sauss. Vespides, I, 20, 23. • 



1 Typus in museo Parisieusi. 



