94 WM. H. ASHMEAD. 



Table of Genera. 



First cubital cell, along the cubitus, fully as long as the second and third united 



nr nearly 2. 



First cubital cell, along the cubitus, shorter than the second and third united. 

 Second cubital cell longer than wide, receiving the first recurrent nervure at 

 or a little beyond the middle ; third cubital cell narrowed at least one- 

 half above. 

 First joint of maxillary palpi a little longer and stouter than the second, 

 joints 3-5 subequal, a little longer than thick, the last joint longer than 

 the fifth : joint 1 of labial palpi long, about as long as joints 2-3 uuited. 

 the last joint shorter than the second, but longer than the third ; para- 

 glossse dilated and rounded at their apices. . . Anthoglossa Smith. 

 First joiut of maxillary palpi a little longer, but scarcely thicker than the 

 second, the following joints very gradually shortening, all more than 

 thrice as long as thick ; labial palpi 4-jointed, the first two joints stout, 

 the first much the louger. longer than 3-4 united, the latter being 

 slender and subequal, a little shorter than the second. 



Diphaglossa Spinola. 



Second and third cubital cells equal, the second suhquadrate, only slightly 



narrowed above; first recurrent nervure interstitial or nearly. 



First joint of maxillary palpi a little the longest joint and stoutest, the 



following subequal; labial palpi 4-jointed, the first about as long as 



2-3 united, the third the shortest ('mi |>ol ica mi Spinola. 



2. Second and third cubital cells, along the cubitus, equal or nearly 3. 



Second and third cubital cells, along the cubitus, scarcely longer than the first, 

 the second often wider (higher) than long, very much shorter than the 

 third ; marginal cell narrowly obliquely truncate at apex. 

 First recurrent nervure interstitial with the first transverse cubitus, or re- 

 ceived by the first cubital cell just before this vein ; third cubital cell 

 receiving the second recurrent nervure towards it apex; submedian 



cell much shorter than the median M<*ga<*ilissa Smith. 



First and second recurrent nervures respectively interstitial with the first 

 and second transverse cubital nervines; labial palpi 4-jointed, the 

 joints successively decreasing in length; antennse subclavate, the 

 third joint only a little longer than the fourth, the following joints 



increasing in length to the apical joint Nadrosoma Smith. 



'.'>. Second recurrent nervure interstitial with the third transverse cubitus; inner 

 spur of hind tibiae pectinate or combed ; joints 1-2 of maxillary palpi 

 stout, subequal, the following joints slender, more than thrice louger 

 than thick; first joiut of labial palpi elongate, as long as joints 2-3 



united ; joints 2-4 also, long Lamprocollete* Smith. 



Second recurrent nervure not interstitial, but received by the third cubital 

 cell beyond its middle. 



Stigma not well developed, or subobsolete 4. 



Stigma well developed, although not large. 



Second recurrent nervure sinuate or somewhat S shaped ; hind tibia? with- 

 out knee plate: maxillary palpi 6-jointed, the first joint hardly longer 

 than 2-3 united, joints 2-5 scarcely longer than thick, the last a little 

 shorter than the first; labial palpi short, 4-jointed. . Colletes Latr. 



