180 HYMENOPTERA OF AMERICA. [PART I. 



Bab. Cuba. Sent to me by Dr. Gundlach. 



This species is very distinct, but by its appearance might be 

 confounded with 0. Havanensis, which has quite a differently 

 formed abdomen, having the angles acute, but not so much pro- 

 duced, ami the clypeus notched. 



Its slender form makes it resemble 0. tigris, although it is 

 very different in the produced angles of prothorax and rounded 

 metathorax. 



B. 3fetathorax no! distinctly marginate. Body not slender, of 

 normal form. 



a. Abdomen nearly conical. The border of the 2d segment not rejlexed. 

 Body velutinous. 



28o A. Parredesi Sauss. — Niger, velutino-hirsutus, argenteo-sericeus ; 

 antennis snbtus femi^ineis ; puueto frontali, pronoti medio et tegulis 

 in margine, ferrugineis; abdominis segmentis 2-5 flavo-marginatis ; 

 secuudo in margine ralde punctata; alis ferrugineis, apice griseo-nebu- 

 losis. — 9. Clypeo infere ferrugineo-macnlato. 



Odynerus Parredes Sauss. Rev. et Mag. de Zool., IX, 1857, 273. 



Total length, 13 mm. ; wing, 10.5 mm. 



Appearance of the 0. nasidens. Clypeus convex, quite finely 

 punctured ; its inferior border truncate, short, and bordered with 

 a salient rim. Prothorax angulate : its angles almost dentiform. 

 Metathorax having its posterior plate punctate and striate, 

 bordered by slightly salient ridges; its superior ridges arcuate 

 in the form of the end of an arch, not forming any superior angle, 

 and on each side only a blunt, indistinct angle. Post-scutel 

 blunted, punctate. Abdomen conical ; the first segment wide, 

 anteriorly truncate; its suture distinct. 



rnsect black, finely punctured, rather more strongly on the 

 metathorax; all the body covered with a thick velvety pile, 

 silvery and a little golden; the abdomen sinning velutinous, with 

 silky and golden reflections, the 2d segment quite strongly punc- 

 tured along its border, but not channelled. The antenna? ferru- 

 ginous beneath, as also a spot toward the base of the clypeus. A 

 dot between the antennae, a line iii the middle of the prothorax, 

 and the border of the wing scale fawn-colored or ferruginous. 

 Segments of the abdomen, all except the first, adorned with a 



