North American Hymenoptera. 



227 



r 



middle: trunk with black sutures: scutel more or less 



wings tinged with ferruginous ; 



tinged with yellow : 



carpus yellowish ; nervures blackish ; central cellule 

 pentangular, the side on the radial cellule rather smallest, 

 basal and apicial sides longest, not parallel : metathorax 

 with slightly elevated lines in the form of an H : tergum 

 with the apicial sutures not black ; basal segment with 

 two slightly elevated longitudinal lines : tibia, posterior 

 pair black at tip : venter, basal segment black ; sutures 

 not black : oviduct not loa£:er than the breadth of the 



anal segment. 



Var. a. Front, scutel aj 



tip, yellow. 



Var. j?. Sutures of the tergum not obviously black. 



Var. Y' Somewhat polished. 



A common species, of which I obtained specimens in 



t> 



tergu 



Mexico ; 

 Missouri. 



ferrugator 



(Trans. Stockholm Soc. for 1787) which I have not met 

 with, unless this should prove to be a variety of it; which 

 is very doubtful and even improbable. 



^ 



2. L malacusy Nob. (Contrib. Macl. Lyceum I., p. 

 To " abdomen with an impressed line each side," 



character 



ought to be added beneath the edge ; this is a 

 however, common to many species. The tergum j in a 

 particular light, has a slight tinge of blue. 



3. I. morulusy Nob. (ibid, p. 73.) Annulation of the 

 antennae beginning with the seventh or eighth joint and 



ending with the fourteenth. 



The tibiae and tarsi 



honey -yellow ; and the oviduct hardly extends beyond 

 the tip of the abdomen. 



It resembles the malacusj and requires the additional 



ven 



