CLASSIFICATION OF THE BEES. 59 



Table of Genera. 



Front wings with two cubital cells 20. 



Front wings with three cubital cells. 



Cubital cells, along the cubitus, with one or another of the cells much longer 



or much shorter than another 3. 



Cubital cells, along the cubitus, more nearly equal, none very much longer or 

 shorter than another ; the first is most frequently the longest, or the 

 second or third is sometimes the longest (>. 



3. Third submarginal cell, along the cubitus, longer than the first, or at least of 



an equal length 4. 



Third submarginal cell, along the cubitus, equal to the first or very much 

 shorter 5. 



4. Second cubital cell, along the cubitus, distinctly shorter than the first or third, 



the third nearly as long as the first, or a little longer and much nar- 

 rowed above, rarely are the. first and second subequal, the second being 

 most frequently much shorter than either the first or third, quadran- 

 gular or wider than long 17. 



Second cubital cell, along the cubitus, somewhat longer than either the first 

 or third ; first discoidal cell about equal in length with the marginal 

 cell; clypeus smooth; first recurrent nervure received by the second 

 at or a little before its middle. 

 Thorax clothed with a dense pubescence, the abdomen more or less bare. 

 except at base ; marginal cell rather short, obtuse or rounded, the third 

 cubital cell much narrowed above ; hind legs in J with a long, dense 

 scopa; mandibles 3-4 dentate < fill ris Fabr. 



5. Third cubital cell much narrowed above, the third transverse cubitus angu- 



lated or strongly curved inwardly before uniting with the radius. .10. 

 Third submarginal cell not or scarcely narrowed above, the third transverse 

 cubitus nearly straight or only slightly curved outwardly; the third 

 submarginal cell along the radius, therefore, as long as, or nearly as 

 long as, along the cubitus. 

 Third cubital cell, along the cubitus, never longer than the first, most fre- 

 quently smaller or shorter, quadrate or nearly .6. 



6. Third cuhital cell not nearly quadrate, much narrowed above 13. 



Third cubital cell quadrate or nearly, never much narrowed above; first cubi- 

 tal cell, along the cubitus, a little longer than the second or distinctly 

 longer. 



Second cubital cell quadrate or nearly, distinctly shorter and smaller than 

 the third, or then wider (higher) than long, or trapezoidal ; clypeus in 



% yellow ; maxillary palpi 6-jointed 9. 



Second and third cubital cells, along the cubitus, equal or very nearly, fully 

 as long or longer than wide. 

 Clypeus in 9 black, in % yellow; maxillary palpi 5 or o'-jointed ; abdo- 

 men sometimes with pale fascia} ; first recurrent nervure received by 

 the second near or a little beyond its middle; first discoidal cell much 



longer than the marginal 7. 



Clypeus in both sexes yellow; maxillary palpi 4-jointed ; abdomen with 

 yellow fascia} or narrowly fasciate with white hairs. 



Saropotla Latreille. 



TRANS. AM. ENT. SOC. XXVI. JUNK. 1899. 



