240 HYMENOPTERA OF AMERICA. [PART I. 



we are not sure that this insect belongs to this group, although 

 the appearance is quite that of 0. cubensis and neighbors. It 

 might possibly go to the group of the Odyueri with hooked % 

 antennae ? 



C. Only the first two abdominal segments margined with yellow. 

 (The od and ±th sometimes indistinctly marginate.) 



74. O. Gayi Spin. — Crassus, thorace quadrato, postice late excavato 

 obtusangulato ; abdomine brevi, lato, conico, basi truncato, primo seg- 

 mento secundo sequilato; macula frontali, orbitis internis, scapo subtus, 

 pronoti margine antico, margine postico tenuiter, macula subalari, post- 

 scutello, maculis 2 metanoti sumini abdominisque segnientorum 1', 2' 

 limbo, albidis ; alis subhyaliuis autice subferrugineis, apice griseis. 



%. Clypeo subemargiuato, luteo. — 9 ?• 



Odyn. Gaiji Spixola, in Gay's Hist. fis. de Chile, Zool. VI, 260 (1851). 

 — Sauss. Vespides, I, 170, 59 ; pi. xvii, fig. 7, % . 



Hah. Chili. (Type in the Paris Museum.) 



V5. O. praecox Sauss. — Niger, capite et thorace confertim punctatis ; 

 abdomiue sericante, conico, basi lato; macula mandibularum, linea 

 frontis verticali, pronoti margine postico, nee non antico tenuiter, 

 macula subalari, punctis 2 in scutelli angulis, post-scutello, maculis 2 

 metanoti abdominisque segmentorum 1', 2' margine, flavis ; reliquorum 

 margine fusco ; tibiis flavo-lineatis ; tarsis fusco-ferrugineis ; alis sub- 

 hyalinis, costa obscuriore. 



9. Clypeo apice dentulis duobus rufis. — % ?. 



Odyn. prcecox Sauss. Et. Vesp. Ill, 254, 1 130; pi. xi, fig. 9, 9, (1854). 



Hah. The southern parts of Brazil and Uruguay. (Paris 

 Museum.) 



Observation. — This species may possibly belong to the Division 

 Odynerus with hooked male antenna?? but its peculiarities bring 

 it nearer to the species of Division Pachodynerus. 



76. O. La Platae Sauss. — Niger, punctatus ; abdomine serieeo, ba*i 



truncato; clypeo 9 apice den'ulis 2 ferrugineis terminate), scapo subtus 

 rufo ; pronoti margine postico, signatura subalari, pui>ctis 2 tegularum, 



1 The note intercalated in the text of the description of this species 

 referred it to the heading A (Group of the 0. Megwra). One more of the 

 chefs d'oeuvre of the printer, who is the cause of all other more grave 

 faults introduced by his negligence into my work on the Vespides. 



