some British Guiana Hymenoptera. 303 



Georgetown. The bees ]>assed to and fro, apparently quite 

 regardless of the proximity of human beings. 



E. 'piliventris, Guer. An uncommon species from Upper 

 Essequebo River. Attracted to flowers of the wild Sola- 

 naceous plant previously mentioned. 



E. analis, Lep. An uncommon species. A large nest 

 consisting of many ovoid cells was once taken from the 

 soil on tlie. East Coast of Demerara. The cells were hard, 

 dark in colour, and joined together. Only one bee hatched 

 from this nest. 



E. cayennensis, Lep. {=fasciata, Lep.). A fairly connnon 

 and widely distributed species throughout the Colony. 

 Nesting habits not observed. 



E. decorafa, Sm. An unconunon species from the interior. 

 Essequebo River. 



Genus Exaerete, Hoftm. 



E. s)iu(ragdina, Guer. A common species in some parts 

 of the interior, especially the N.W.D. All of my specimens 

 were collected while flying about piles of cord wood from 

 which a strong-smelling sap was exuding, and on which 

 the bees were feeding. Occasionally seen on the coast 

 lands and in the Botanic Gardens, Georgetown. Nesting 

 habits unobserved. 



Subfamily MEGAGHILINAE. 

 Genus Megachile, Latr. 



M. lohilarsis, Smith. An uncommon species with a wide 

 distribution. 



M. lanala, F. This insect has only once been collected, 

 and that beneath the (Government Laboratory, George- 

 town. The mud cells were situated within a disused 

 |-inch iron ])ipe. The nest was cylindrical in shape and 

 contained about four cells. The nest was very firmly 

 cemented together, making the whole structure exceed- 

 ingly strong and hard to break. This bee is well known 

 in India.* 



Subfamily COELIOXYNAE. 

 Genus Coelioxys, Latreille. 



C. siniillima, Smith. Apparently a widely distributed 

 though not common species. Nest observed in cylindrical 

 borings in a wooden post. 



* Lefroy, H. Maxwell, " Indian Insect Life," p. 219. 



