VOL. XVIII, PP. 177-184 JUNE 29, 1905 



PROCEEDINGS 



OF THK 



BIOLOGICAL SOCIETY OF WASHINGTON - 



NEW AMERICAN BEES. 

 BY T. D. A. COCKERELL. 



The described bees of North America, including Central 

 America and the West Indies, number nearly 2,000 species, 

 while Europe has upward of 1,800, not counting the Palaearctic 

 portion of Africa. New species are still frequently found in 

 Europe, while in our own country there are vast areas of which 

 the bees are still practically unknown, and it is probably well 

 within the mark to suppose that we have in reality at least 

 5,000 species. It is not surprising, therefore, that recent col 

 lections are found to contain many undescribed forms, some of 

 which are herewith recorded. It is much regretted that in sev 

 eral cases the collectors' data are not more complete, but there 

 is rapid improvement in this respect, and it is hoped that the 

 time will soon come when we shall be supplied with not only 

 precise localities and dates, but flower-visiting records as well. 

 It will be observed that the species most deficient in these 

 resp-.rts come from old collections. 



Synhalonia cressoniana sp. nov. 



Venial?. Length a little over 10 mm.; pubescence in general white, but 

 dense and rather lively ochraceous on thorax above, and tinged with the 

 same color on occiput ; abdomen shining black (though beset with numer 

 ous minute punctures), with four entire, well-defined, rather narrow white 

 hair-bands, occupying the base of the second segment, and the margins of 

 the second to fourth, those on the third and fourth being purer white, and 

 31 PROC. BIOL. Soc. WASH., VOL. XVIII, 1905. (177) 



