198 HYMENOPTERA OF AMERICA. [PART I. 



Bess. a. cliff. — 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 naetatborax, without bordered cavity ; its narrow 

 first abdominal segment, with the yellow margin narrowed, not 

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

 ment. These spots and the partly ferruginously tinged wings 

 distinguish it from all the other Stenancistrocerus. 



Bab. Cuba (Dr. Gundlach). 



34. A. incom modus Sauss. 



Odynerus incommodus Sauss. Vespides, I, 143, 29, %, 1S52. 

 0. tolteco affinis species at diversa. 



Hab. America meridionalis. Columbia (Typus in raus. 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. scatxriliscililis Spin. — Parvulus, niger, gracilliraus, elongatus, 

 cylindricus, valde punutatus ; clypeo J convexo, punctato, apice trun- 

 cate- ; thorace elongate-, antice lato, bidentato ; postice angnstiore ; ubi- 

 que gi'osse punctato ; metanoti rugo?i foveola punctata marginibus rugo- 

 sis, superue canthis prominulis acutis marginata ;' bis a post-scutello 

 per fissuram sejunctis ; abdomine gracillimo, cylindrico ; primo seg- 

 raento basi distincte truncato, supra grosse punctato ; secundo elougato, 

 dense punctato ; baud latiore quara primum, margine hand rugoso ; 

 antennis subtus ferrugineis ; puncto frontali et oculari, pronoti raarginis 

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

 uisque segmentorum l 1 , 2 1 limbo albidis ; tibiis extus albidis. Alis 

 hyalinis. Longit. 7.5 mm. 



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

 terim, albidis. 



Odynerus scabriuscuhts Spinola, in Gay's Hist, fisica de Cbile. Zool., VI, 

 2U2.— Sauss. Vespides, I, 140, 1 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: ferrugineux, read fort ement ponctue". 



