ODYNEEUS. 211 



45. A. advena Sauss. — Gracilis, cylindricus, punctatus, niger, thorace 

 antice lato, angulato, postice attenuato; metathorace paalum ultra post- 

 scutellum producto, truncato, foveola superne semicirculariter acute 

 marginata, uiargine utrinque infere augulato; 1° segmento angu.stiore 

 quam 2um, antice truncato; 2° superne basi coarctato, subtubercuiato; 

 antennis fulvis, flagello superne nigro ; capitis maculis, pronoti margine 

 antico et postico, macula subalari et praescutellari, t^gulis partirn, 

 inetanoti abdominisque segmentorum rnarginibus anguste, flavh ; primi 

 seguienti fascia utrinque lateraliter continuata; pedibus flavis, nigro- 

 variis ; alis infumatis. $. Longit. 9 mm. 



Odynerus advena Sauss. Et. Vesp. Ill, 222, 117; pi. xi, fig. 3, 4, 9 . 

 Eab. — Brasilia (Typus in Mus. Londinensi). 



Division ANCISTROCEROIDES. 

 (Ancistroceroides Sauss. Et. Vesp. Ill, 221; I, 146, III e Divis.) 



Second cubital cell of the anterior 'wing subpedunculate. (Me- 

 talhorax excavated, armed on each side with a spine.) • 



46. A. alastoroides Sauss. — Gracilis, niger; capite et tborace punc- 

 tatis ; clypeo % bidentato ; pronoto antice lato, quadratic! secto, post- 

 scutello bituberculato ; metathorace valde excavato, acute margin ato, 

 utrinque spinoso ; abdomine sericante, in basi 2' segmenti constricto ; 

 1° segmento superne sulco partito; clypeo, puncto mandibularum, 

 puncto frontali et post-oculari, orbitis internis, linea scapi, pronoti 

 margine postico, macula subalari, linea utrinque metanoti infere et 

 fascia scutelli, flavis; antennis subtus et tegim's fuscis; abdominis 

 segmentis 10-30 flavo-limbatis ; pedibus fuscis, flavo-lineatis; alis in- 

 iufumatis. £ Longit. 10 mm. 



Odynerus alastoroides Sadss. Et. Vesp. I, 147, 33, $ . 



Hab. Montevideo. 



Tins species might almost be placed in the genus Alastor (sub- 

 genus Alastoroides), where it would form a section, characterized 

 by the 2d cell of the wing being subpedunculate only, ami by 

 the presence of spines on the metatborax. 



