CLASSIFICATION OF THE BEES. 6' 



Metathoracic angle bare or with a very short appressed pubescence; trans- 

 verse median nervure angulate; scutellum convex, with a very slight 

 median depression posteriorly, or at most sub-bilobed ; axilla; triangu- 

 lar, blunt behind EpeolllS Latr. 



8 Mandibles simple ; abdomen with transverse bands. 



Free portion of the marginal cell much less than that occupied by the cubi- 



Ul l s I>«>ri..g>ella Holmberg. 



Free portion of the marginal cell much greater than that occupied by the 

 cubitals; second cubital cell subtriangular ; maxillary and labial 



palpi as in Dosringiella Tropliocleptria Holmberg. 



9. First recurrent nervure. not interstitial with the second transverve cubitus, but 



joining the second cubital cell before or beyond the middle 11. 



Frst recurrent nervure interstitial with the second transverse cubitus. 

 First and second cubital cells, along the cubitus, of an equal length or nearly, 

 the second sometimes a little the longer ; labial palpi 4-jointed. • . -10. 

 First cubital cell, along the cubitus, longer than the second, the latter hardly 

 so long as the third ; scutellum normal ; maxillary palpi 4-jointed. 



lthaf lij in us Lepel. = Liogaster Perty. 



10. Second cubital cell, alone, the cubitus, twice as long as the third, the latter wider 



than long; scutellum bituberculate; maxillary palpi 1-jointed, with 



an annulus at base Eurytis Smith = Hopliphora Lepel. 



Second cubital cell, along the cubitus, rarely much longer than the third ; scu- 

 tellum bilobed ; maxillary palpi 3-jointed Melissa Smith. 



11 First recurrent nervure joining the second cubital cell at or before the middle..^. 

 First recurrent nervure joining the second cubital cell beyond the middle. 

 Scutellum simple, rounded posteriorly; mandibles bidentate ; maxillary 



palpi 4-jointed ; labial palpi 2-jointed Melectoldes Taschenb. 



Scutellum bituberculate. 



Second cubital cell smaller than the third, both a little narrowed above, 

 the second along the radius scarcely two-thirds the length of the third : 



tibial spurs simple Mesocheira Lepel. 



Second cubital cell longer than either the first or third, oblong-quadrate, 

 the third petiolate ; hind tibial spurs simple ; maxillary palpi 6-jointed ; 



labial palpi 4-jointed Mesonychiu ... Lepel. 



Scutellum distinctly bidentate. 



Second cubital cell almost quadrate, a little smaller than the third ; mid- 

 dle tibiae with one spur, its apex bifid, the posterior tibial spurs serrate 



... . Mesoclieira Lepel. 



within 



12 Marginal cell separated from the costa its entire length; second recurrent 

 nervure interstitial with the second transverse cubitus; maxillary 



palpi 6-jointed ; labial palpi 4-jointed Florentiua D. T. 



Marginal cell separated from the costa only towards the apex ; second recur- 

 rent nervure not interstitial. 

 Labrum longer than wide. 



Maxillarv palpi wanting; labial palpi appearing as a single long bristle: 



mandibles bidentate- Exasrete Hoffmansegg = Ghrymntheda Perty. 



Maxillary palpi 2-jointed; second cubital cell trapezoidal; scutellum 



normal, subconvex Epeichar.S Ladoszk. 



Maxillarv palpi 3-jointed; second cubital cell quadrate; scutellum ele- 



Enicl.aro.des Radosz. 



vated r 



„ VVJ JUNE. 1899. 



TRANS. AM. KNT. SOC. XX\ I. 



