ODYNERUS. 331 



incomplete. Feet black. Knees, tibiae, and tarsi yellow. Wings 

 subhyaline, nerves fusco-ferruginous. 



?. Clypeus broadly pyriform, black, with a superior fascia or 

 two spots near the apex, yellow ; the apex truncate, subdentate. 



Var. Clypeus yellow, with a black spot. 



Bess. a. diff. — This species is particularly distinguished by the 

 form of its metathorax, which recalls 0. conformis, the thorax 

 being elongate, convex-cylindric, the prothorax not contracted 

 anteriorly. The abdomen has the first segment shorter, not as 

 long as wide above, more as in 0. conformis. It has some 

 similarity to 0. perennis, but it is larger; the 1st segment is as 

 wide as the 2d, the body not so coarsely punctured, etc. 



Hob. Cuba. ?. 



131. O. iigulllS Sauss.— Niger, niticlus, gracillimus, pronoto suban- 

 gulato ; abd. 1^ segmento antice truncato, supra rugoso; capite, tboraee 

 et pedibus, luteo-signatis ; pronoti et post-scutelli raargine antico linea 

 lutea; abdominis seguientis l'-2' margins luteo ; alia hyaliuis, in costa 

 subinfuscatis. J. 



Odyn. Jiyulus Sauss. Et. Vespid., Ill, 247, 120 (1851). ' 



Total length, 10 mm. ; wing, 8 mm. 



Ail insect having a slender, cylindrical, lengthened form. 



5. The clypeus is rugulose, pyriform, and seems to terminate 

 in two sharp little teeth ; but these are only marked out by a 

 fossette on the border. The thorax is wide before, its anterior 

 margin is straight bordered, and the angles are distinct; before 

 these angles the prothorax is slightly retracted. The scutel is 

 notched on each side by a fossette. The metathorax has its 

 lateral ridges horizontal ; it forms on each side an angle blunted 

 by the meeting of long inferior ridges ; the posterior plate is 

 triangular, occupied entirely by the concavity, which is bordered 

 on each side by the inferior ridges, while posteriorly they lose 

 themselves in the rugosities of the summit The abdomen is 

 slender and shining ; the first segment is truncated anteriorly, 

 following a ridge quite distinctly ; its superior face is very 

 coarsely punctured before and behind, always rather less toward 



1 It is probably in consequence of a transposition, that this species is 

 found placed 1. c. in the division Parodtjnerus, I am not wholly sure of 

 the place it should occupy, not having the type before me. 



