CLASSIFICATION OF THE BEES. 95 



4. Second cubital cell very short, much wider (higher) than long, and, along the 

 cubitus, only about one-third the length of the third, receiving the 

 first recurrent a little, before the middle ; third cubital cell nearly as 

 long along the radius as along the cubitus ; joints 2-4 of maxillary palpi 

 longer than thick ; first joint of labial palpi long, longer than joints 

 2-3 united Paracolletes Smith. 



Second cubital cell a little longer than wide and more than half the length of 

 the third, the first recurrent nervure received by it at the middle; 

 third cubital cell, along the radius, only about one-third as long as 

 along the cubitus; joints 2-4 of maxillary palpi three or more times 

 longer than thick; first joint of labial palpi very elongate. 



Leioproctus Smith. 



Second cubital cell equal narrowed on each side towards the marginal and 

 receiving the first recurrent nervure at its middle ; joints 1-2 of maxil- 

 lary palpi rather long, subequal, both of which are about as long as 

 joints 2-3 united ; first joint of labial palpi long, about as long as 2-3 

 united, the last joint shorter than the third ; paraglossse broad and 

 rounded at apex Dasycolletes Smith. 



Family XIV. PROSOPID^. 



(The Obtuse-tongued Carpenter Bees). 



This is a small but distinct group or family, at one time supposed 

 to be parasitic, the species agreeing in their mouth parts with the 

 Colletidfle (and many of the wasps), but are readily distinguished 

 from them by having only two cubital cells in the front wings, the 

 non-pubescent body, and by the hind tibiae being without a distinct 

 pollen brush. 



They are known to burrow into the twigs of bramble, elder and 

 other shrubs, in which, after extracting the pith, they construct 

 their cells— filled with pollen and honey. 



Table of Genera. 



Marginal cell at apex acuminate, or narrowly rounded, never truncate; mandi- 

 bles bidentate ; body bare or nearly 2. 



Marginal cell at apex somewhat obliquely truncate, with an appendage; body 

 pubescent. 

 Stigma sublanceolate; first and second cubital cells subequal, the first slightly 

 the longer, the second receiving both recurrent nervures ; maxillary 

 palpi 6-jointed, the first joint as long as joints 2-3 united, the following 

 subequal, labial palpi 4-jointed, the first long and stout, longer than 

 the following united Pasiphse Spinola. 



2. First cubital cell twice as long as the second, or very nearly 4. 



First cubital cell equal to the second, or somewhat smaller, or the second is 



shorter than the first. 



First recurrent nervure received by the first cubital cell just before the 



first transverse cubitus, the first cubital cell much longer than the 



second. 3. 



TRANS. AM. ENT. BOC. XXVI. JUNE, 1899. 



