202 HYMENOPTERA OF AMERICA. [PART I. 



c. The marking's pale yellow; no spot before the scutellura. 



d. Some individuals from Florida have all their markings 

 orange or blood red. The wings are a little more smoky. 

 These specimens are also more strongly cribrose, more rugose; 

 the first moiety of the antennae is reddish with a black line on the 

 scape One sees on the first segment a transverse fluting which 

 passes along the suture, especially distinct upon the sides, at 

 limes effaced in the middle. As one finds all the transitions of 

 our type in these individuals, I have concluded that it is but a 

 simple variety, formed by a more perfect development of indi- 

 viduals under the influence of the heat of the climate of the 

 southern districts. These individuals have no mesothoracic spot 

 before the scutellum. 



%. Almost as large as the female. Clypeus prolonged, poly- 

 gonal, bidentate, yellow or whitish ; its teeth slightly variable, 

 at times black; inner border of the orbits yellow ; spots of the 

 metal horax small or wanting. Second segment of the abdomen 

 a little wider. 



Ress. a. diff. — This species is difficult to distinguish from the 

 0. ssecularis and the 0. pedestris. (See the description of these 

 species.) Jn other things it closely approaches the 0. vagus, 

 O. conformis, which have almost the same marking, but do not 

 offer any suture on the 1st abdominal segment; a little less 

 similar also to the 0. collega and Xantianus, which have, how- 

 ever, the 2d segment more swelled and which finally offer no 

 suture on the first abdominal segment. 



One often sees the suture in this variety become feeble, seeming 

 then to form a transition to the 0. vagus; nevertheless, the 

 met at horax is always more rugose than in this species, and the 

 punctures of its thorax are stronger also. 



Hab. The Southern United States, Louisiana, Florida, Ten- 

 nessee, Illinois. 5 9, G %. 



3$. A. saeCMBaris Sauss. — Niger, elongatus, gracilis, cylindricus, 

 grosso punctatus; flavo-amltipictus ; 0. fulvipedi simillimns, sed ineta- 

 noto rotuudatiore, abdominis primo segmeuto grossius punctata, supra 

 valde punctata, antice lsevi, sutura vix perspicua ; segmentis 1-4 flavo- 

 limli.itis, prima iusuper fascia interrupta flava et secuudo macula 

 utrinque flava. 



Odynerus scecularis Sadss. Et. Vesp., I, 142, 26. 



