130 HYMENOPTERA. 



tips; the flaf^elluiii pale testaceous beneatli. Tliorax, the disk 

 thinly covered with ])ale ochiaeeous j)iil)eseenee ; the anterior 

 and intermediate tibia; in front yellow ; all the tibiie and tarsi 

 have a pale ^litterinjr ))ul)eseence ; the apical joints of the tarsi 

 fernitrinous ; wings SHl)hyaliiie, iridescent, nervnres fuscous, the 

 teguhe testaceous. Abdomen short and somewhat globose, de- 

 licately jjunctured, the margins of the segments have on each 

 side a short fascia of white jjubescence. 



Obs. The fascia on the abdomen probably in very recently 

 disclosed specimens would be entire. 

 Hub. East Florida. (E. Doubleday, Esq.) (Coll. F. Smith.) 



Genus 5. MACROTERA. 



Macrotera, F. Smith's MSS. (Details, Plate V.) 



Head as wide as the thorax, ocelli in a slight curve on the 

 vertex ; l he mentum about one-thu'd the length of the labium ; 

 the labium elongate, slender, tapering to a point at its apex ; 

 the labial palpi four-jointed, the basal joint one-third h)nger 

 than the three following united ; the basal joint narrowest at its 

 apex ; maxillary jjalpi six-jointed, gradually tapering to the apex ; 

 the anterior wiugs having one marginal cell, truncate at its apex ; 

 submarginal cells two, the first about twice the length of the 

 second ; the second narrow ed to about half its length towards 

 the marginal ; the posterior tibiie having a long loose clothing of 

 hair. 



I. Macrotera bicolor. B.M. 



Female. Length 4 lines. — Head and thorax black, head de- 

 licately and closely punctured, the clypeus and lower parts of 

 the face having large scattered punctures, the anterior margin 

 of the clypeus truncate ; the flagellum rufo-testaceous beneath ; 

 the mandibles ferruginous, rounded at their apex, edentate. 

 Thorax, the disk smooth and shining, having a few scattered 

 fine punctures, the metathorax rounded, impunctate above, and 

 having a thin ])ale pubescence ; the w ings hyaline and iridescent, 

 the tegula; testaceous, nervures ferruginous ; the tarsi have a 

 glittering pale yellow pubescence, and the posterior tibise have a 

 thin scoj)a of the same colour, the claw- joints of the tarsi rufo- 

 testaceous. Abdomen elongate-ovate, ferruginous, more or less 

 fuscous at the base, the apex having a thin fimbria of pale pubes- 

 cence. 



Hab. Mexico. 



