86 WM. H. ASHMEAD. 



12. Cubital cells, along the cubitus, very unequal, the first about thrice as long as 

 the second, the latter quadrate or nearly; first recurrent nervure re- 

 ceived by the first cubital cell near the apex, the second recurrent by 

 the second cubital cell also near the apes ; submedian cell much shorter 

 than the median ; head not wider than the thorax, but seen from in 

 front oblong, about twice as long as wide, the eyes fully thrice as long 

 as wide or more ; antenna? clavate : mandibles bidentate at apex; 

 maxillary palpi 6-jointed ; labial palpi 4-jointed, the first joint the 



longest HyloeoMoma Ashm. 



Cubital cells, along the cubitus, equal or nearly, the first usually a little the 

 longer; transverse median nervure interstitial with the basal nerv- 

 ure; head normal. 



Second cubital cell narrowed fully one-half or more above ; head and thorax 

 pubesecnt. bare or nearly on vertex and metathorax ; flocculus on hind 

 tibia- and tarsi normal : abdomen rufous, the dorsal segments 2-4 deli- 

 cately but not sharply depressed at apex ; clypeus with a transverse 

 impression anteriorly. South America ( Argentine). 



Perditomorplia Ashm. n. g. (P. Brunerii Ashm.). 



Second cubital cell narrowed one-third above; thorax clothed with a dense 

 pubescence; flocculus on hind tibiae and tarsi long, dense; abdomen 

 black, pubescent and fasciated ; maxillary palpi 6-jointed; labial palpi 

 4-jointed, subequal, the joints enlarged at apex. . • Dasy po<la Latr. 



Family XII. ANDRENID.E. 



(The Acule-tongued Burrowing Bees). 



This family is of great extent and very numerous in species, 

 which are closely allied and extremely difficult to separate. They 

 are found widely distributed over all parts of the world and in 

 every clime, climate apparently having little effect upon the distri- 

 bution of certain of the genera and species. Most of them, but 

 not all, have short acute tongues, and are found in late Spring and 

 Mid-Summer making their burrows in clay banks and in hard, 

 compact soils of various kinds, hence the name given to them 

 above seems most appropriate. 



Some Andrenids in color and on account of the dense pubescence 

 on the head and thorax bear a striking resemblance to some of the 

 Anthophorids, and may be easily confused with them. The labrum 

 is, however, never large and free, although more or less distinctly 

 visible, while the joints of the labial palpi are cylindrical, all much 

 alike in general appearance, the first two joints never compressed, 

 valvate as in the Apidse, Bombidse, Anthophorida?, etc. 



A little care at first, as to the general habitus of the venation, 

 mouth parts, etc., will soon enable the student to separate at a 

 glance an Andrenid from other bees. 



