ODYNERUS. 221 



(baud postico) luteo-limbato; abd. segmentis, 1°, 2° luteo-ruarginatis ; 



alis ferruginescentibus, apice infuscatis. — Lougit. 13 mm. 

 $? . Clypeo nigro, apice bicarinato, subemarginato. 

 £ . Clypeo elougato, euiarginato, luteo, utrinque nigro-marginato ; anten- 



narum scapo supeme riigro vel obscuro uncino luinuto, rufo. 



Odyn. subpetiolatus Sauss. Vespides, I, 162, 43 (1852).— Ill, 227, $%. 

 Odyn. coarctatus Sauss. Gay's Hist, fisica de Chile, Zool. VI, Suppl. p. 

 565, 7, 9 (1852).i 



Bab. Chili. 



51. O. tuberctllatus Sauss. — Major quam 0. arcuatus eiqne formis 

 affinis, sed tborace latiore ; abd. priiuo segmento paulo latiore, supra 

 postice sulco partito, et ante sulcuin in caiilho transverso tuberculo 

 parvnlo instructo; secundo segmeuto nee supra nee subtus tuberculato; 

 post-scntello tantum in apice truncate Niger, rugulatus, velutinns, 

 hirsutus. Antennis ferrugineis, apice nigris ; ore, pronoto, tegulis runs ; 

 lineola post-oculari, pronoto medio frequenter, post-scntello et abdominis 

 segmentorum 1', 2' margiue, luteis ; alis ferrugineis, apice fusco-viola- 

 scentibus. — Longit. 16 mm. 



$ . Clypeo nigro, piriformi, satis planato, bicarinato, apice truncato, vel 



subemarginato. 

 % . Clypeo elongato, paulura bidentato, luteo ; antennarum uncino apicali 



nigro; post-scutello nigro. 



Odynerus iuberculatus Sauss. "Vespides, I, 163, 50 (1S52). — Gay's Hist, 

 fis. de Chile, Zool. VI, Suppl. 564, 6, 1852.— Vespides, III, 22S. 2 



This species differs from 0. humeralis in its smaller size; its 

 antennae % terminated by a sharp black hook, not by a rufous 

 spiral or a blunt hook. The clypeus is more narrow; in ? 

 flattened, bicarinate; in £ not so sharply bidentate. 



Bab. Chili. 



52. O. tlltoerculiveiltris Spin. — Minutus, 0. arcuato formis simil- 

 limus ; sed pronoto lato, angulato ; post-scutello baud truncato, postice 

 angulato, vel arcuato ; abdominis secundo segmento subtus basi tuber- 

 culo acuto instructo. Niger, velutinus ; antennis, tegulis et pedibus 

 runs ; his basi nigris ; macula froutali, punctilio post-oculari margine 

 antico, macula subalari, postscutelli et abd. segmentorum 1', 2', margiue 

 postico, luteis. Alis subbyalinis, venis ferrugineis, apice griseo. — Longit. 

 8 mm. 



1 Tins supplement appeared after my book I on Vespides ; and hence I 

 preserve the name subpetiolatus as being tbe older. 



2 In this paragraph of Vol. Ill, the affinities are not well given. 



