ODYNERUS. 235 



he had seen the female of it; when he said "bordered with yel- 

 low," he had seen the male, whieh he may have taken for a female, 

 because the antenna; do not possess a hook. 



According to Latreille, the prothorax is ornamented with yellow 

 on the anterior border, and it has a yellow dot behind the eyes, 

 but we suppose that he was rather troubled about the golden 

 reflections. 



This unfortunate description of Latreille has caused me to 

 lose infinite time in vain researches, without the least result, 

 so that I have finally brought myself to announce the above 

 opinion which I think to be the only correct one. 



68. O. fiiiBiiplicicormis Sauss. — 0. nasidenti similliraus, sed thorace 

 paulo breviore et clypeo in utroque sexu truncato, haud distincte 

 emarginato, J apice flavo-bipunctato, % flavo-marginato. 



Odijnerus simplicicornis Sauss. Vespides, III, 253, % (1854) ; Id. Sagra's 

 Hist, de Cuba, Ins. 771, pi. 19, fig. 5.— Rev. Zool. X, 1658, 166 

 (faulty).— Cresson, Phi lad. Ent. Proceed. II, 1865, 165. 



9 . Total length, 11 mm. ; wing, 9 mm. 

 % . Total length, 8 mm. ; wing, 7 mm. 



?. A little' smaller than the large variety of the 0. nasidens ; 

 the same color, the same velvety and silky aspect. Clypeus a 

 little striate, less strongly punctured, truncate at the extremity, 

 but biangulate, often a little bidentate. Thorax a little longer 

 than wide; shorter than with the 0. nasidens, longer than with 

 the 0. brevitliorax ; mctathorax as with the nasidens, finely 

 striate. Abdomen as with the 0. nasidens. Antennae ferrugi- 

 nous beneath in their fii^st moiety ; a yellow dot on the summit 

 of the mandibles, two at the base of the clypeus, and often two 

 more on the front; posterior border of the prothorax, often the 

 anterior also, post-scutel, superior ridges of the metathorax, and 

 border of the segments 2-G yellow; tibhc often ornamented with 

 yellow. Wings ferruginous, with the end gray. 



%. Smaller; clypeus polygonal, truncate, offering at the two 

 extremities of its inferior border a marked angle, more decided 

 than in the 0. auratUs V, its lateral and inferior borders, yellow; 

 a yellow lino on the scape and in the sinus oi' the eves. Yellow 

 ornaments of the thorax indistinct. 



Ress. a. diff. — Differs from the 0. brevithorax by its clypeus, 

 whieh is not strongly bidentate, and by the yellow ornaments of 



