NOMADA. 249 



The only flower which it has been noticed that they 

 frequent is the Viper's Bugloss (Echium vulgar -e). 



Subsection 2. NTJDIPEDES (naked-legged Cuckoo Bees), 

 a. With three submarginal cells to the wings. 



Genus 14. NOMADA, Fabricius. 

 (Plates VIII., IX., X.) 



Gen. Char. : HEAD transverse ; ocelli in a triangle on 

 the vertex; antennae filiform, scarcely geniculated, the 

 scape short, the basal joint of the flagellum subglobose, 

 the second joint clavate, the remainder subequal ; face 

 flat, or slightly concave, carinated longitudinally in the 

 centre between the insertion of the antennae; clypeus 

 subtriangular, convex, deflected at the lateral angles; 

 labrum subcircular, very gibbous and protuberant; 

 mandibles acute or subbidentate ; tongue long, acute; 

 paraglossa about one-fourth its length, acute; labial 

 palpi two-thirds the length of the tongue, the two basal 

 joints membranous, the basal one as long as the rest 

 united, and tapering to its extremity, the second joint 

 less than half the length of the first, and not wider at 

 its base than the apex of the first joint, and tapering 

 like that to its end, where it is acute, the third joint 

 short, subclavate, and the terminal one half the length 

 of the preceding, very slender and linear; labium about 

 one-half the length of the tongue, and at its inosculation 

 produced obtusely in the centre; maxillae subhastate, 

 about the length of the tongue ; maxillary palpi six- 

 jointed, the basal joint short, robust, subclavate, the 

 second the longest, and with the rest tapering in sub- 

 stance and diminishing in length to the extremity, the 



