ii26 HYMENOPTERA OF AMERICA. [PART I. 



2° segmento paulo latiorequamprimum, subtus basi plicato-tuberculato. 

 Niger; mandibulis, tegulis, pedibus et antennis, rufis; bis apice supra 

 griscescentibns ; abdominis primo segment o luteo-niarginato ; alis ferru- 

 gineis apice fusco-violascentibus. — Longit. 15 mm. 

 9. Clypeo welougato, rufo, apice bicarinato submargiuato, utrinque nigro- 

 marginato. — % ?. 



Odyn. Antuco Sauss. Et. Vespides, I, 1G7, 55, 9 (1852).— Gay's Hist. fis. 



de Chile, Zool. VI, Suppl. 562, 2 (1852). 

 Odyn. Antucensis Sauss. Et. Vespides, III, 228. 



Bess. a. diff. — This species is closely allied to villosus, but its 

 body is thicket-; the thorax is quadrate and wide anteriorly ; the 

 color of the wings and clypeus $ is different. 



Hab. Chili. 



62. O. Cliiliotfus Sauss. - — Niger, velntinns, nigro-birtns ; 0. Anlucensi 

 affinis ; thorace brevi ; metanoto late excavato, canthis marginato, 

 utrinque angulato ; abdominis secundo segmento subtus valde tubercu- 

 lato ; segmentis 1°, 2° margin e luteo ; antennis et pedibus rufis ; tegulis 

 nigris ; alis fusco-violascentibus, costa ferruginea. — Longit. 11 mm. — 



9 ?. — % . Clypeo elongato, bidentato, luteo. 



Odyn. chiliotus Sauss. Vespides, I, 167, 56, % . — In Gay's Hist. fis. de 

 Chile, Zool. VI, Suppl., 566, 9.— Vespides, III, 229. 



I do not possess this species, which seems much like 0. Antu- 

 censis. I3ut I cannot think it the male of that, because of its 

 biangulate metathorax. The first abdominal segment seems to 

 have on its anterior face something like a suture, which allies it 

 to the subgenus Ancistrocerus. 



Hub. Chili (Paris Museum). 



63. O. ruficollis Spin. — Ater, velutinus, nigro-hirsntus, crassus et 

 brevis ; abdomine basi valde truncato, lato ; metanoto rotundato; ab- 

 dominis 20 segmento subtus basi plicato-tuberculato; antennis, pronoto, 

 tegulis, pedibusque, ferrugineis ; abdomine fasciis 2 luteis ; alis ferru- 

 gineis, apice fuseo-nebulosis. — Longit. 11 mm. 



9. Clypeo biangulato, rufo,.nigro-marginato. — % ?. 



Odyn. rujicollis Spin. 1. 1. VI, 259.— Sauss. Et. Vespid. I, 168, 57, 9 . 



I do not possess this species. By its livery, it would seem a 

 miniature of 0. humeralis, but the abdomen is more sessile, the 

 clypeus 9 is rufous; the metathorax is rounded, not sharp, on 

 its margins, etc. The form is more that of 0. Antucensis. 



Hab. Chili (Type in the Paris Museum). 



