198 HYMENOPTERA OF AMERICA. [PART I. 



Ress. a. <litj. — In its size and colors, this has rather the 

 appearance of 0. cingulatus, but is very distinct from it in its more 

 slender body; its metathorax, without bordered cavity ; its narrow 

 first abdominal segment, with the yelloAY margin narrowed, not 

 widened at the sides, and in the two yellow spots of the 2d seg- 

 ment. These spots and the partly ferruginous!}- tinged wings 

 distinguish it from all the other Stenancistrocer us. 



Bab. Cuba (Dr. Gundlach). 



34. A. iiicomiuodiis Sauss. 



Oclynerus incommodus Sauss. Vespides, I, 143, 29, % , 1852. 

 0. tolteco affinis species at diversa. 



Hab. America meridionalis. Columbia (Typus in rnus. Pari- 

 siensi). 



B. First segment of the abdomen inform of a prolonged bell, 

 rather squarely-rounded, about as wide as the second seg- 

 ment, not contracted before. 



a. First segment sharply truncate anteriorly. 



35. A. scabriaiscuilis Spix. — Parvulus, niger, gracillimus, elongatus, 

 cylindricus, valde puuctatus ; clypeo 9 convexo, puuctato. apice truu- 

 cato ; tborace elongato, antice lato, bidentato ; postice angustiore ; ubi- 

 que grosse puuctato ; metanoti rugosi foveola punctata marginibus rugo- 

 sis, superne cantkis proniinulis acutis marginata ; bis a post-scutello 

 per fissuram sejunctis ; abdomine gracilliuio, cyliudrico ; priuio seg- 

 mento basi distincte trunoato, supra grosse puuctato ; secuudo elongato, 

 dense punctato; baud latiore quam primum, margine baud rugoso ; 

 antennis subtus ferrugirieis ; puncto frontali et ocnlari, pronoti marginis 

 antici fascia sinuata, macula subalari, tegulis, post-scutello, abdorai- 

 nisque segmentorum 1', 2' limbo albidis ; tibiis extus albidis. Alis 

 hyalinis. Longit. 7.5 mm. 



% . Clypeo emarginato, albido ; fascia in scapo et orbitarum margine in- 

 terim, albidis. 



Odymnis scabriusculus Spinola. in Gay's Hist, fisica de Cbile. Zool., VI, 

 2 \±— Sauss. Vespides, I, 140,' 24; III, pi. xi, fig. 1, £. 



Hab. Chili. 



This Odynerus is remarkable by its very slender form and by 

 its first abdominal segment being sharply truncate, in such a 



1 Page 141, in place of: ferruyineux, vcT\,<iforte)ncntponctu6. 



