ODYNERUS. 29*7 



Var. Post-scutel black, without yellow band. 



?. Clypeus pyriform, truncate, bidentate or biangulate at tip, 

 coarsely punctured near the extremity ; adorned with two yellow 

 lines at its apex. 



% . Clypeus elongate, a little bidentate at the apex, the inferior 

 part occupied by a large orange macula; its teeth and apical 

 edge black. Hook of the antennae small, black. 



Var. The orange macula of the clypeus much extended. 



Bess. a. diff. — A very distinct species, having quite the 

 characters of the Odynericla? of the northern Andes of South 

 America, velutinous, grisly with long black hair. This insect 

 forms somewhat a transition to the Hypodynerus ; it lives also 

 quite on the northern limits of the distribution of this group of 

 insects. 



Hab. New Granada. Sta Fe de Bogota, 2 9,2 %. 



Section II. — Body still stubbed, not slender, nor cylindrical. 

 Abdomen not conical, but remaining sessile ; the 1st segment 

 smaller than the 2d, as strongly or more strongly punctured 

 than the 2d ; the 2d constricted at base to fit into the first 

 and more or less deformed ; having its margin very strongly 

 canaliculate and rejlexed, and more or less swelled before 

 the channel. 



This group is formed for exceptional types, still belonging to 

 the Division Odynerus by their general aspect, but passing to 

 Stenodynerus by the form of the abdomen, which is no longer 

 conical or ovate-conical, but more narrow anteriorly, and by the 

 scutel, which is not so distinctly truncate, nor ridged on the line 

 of the truncation. The two species which follow are approximate 

 in the form of the abdomen, but very different in that of the 

 clypeus % . 



A. Metathorax not narrowed below, much excavated, with very 

 sharp edges; post-scutel bituberculate ; abdomen quite de- 

 formed. 



HO. O. Clamicullis Sauss.— Niger, crassissime cribri instar punc- 

 tatus ; pronoto cristato, post-scutello bimamillari ; metathorace valde 

 excavato, superne acute raarginato ; 2° segmento postice cluniuni 

 duaruni instar turgente, rnargine profuudissime canaliculato et maxime 



