n8 Cameron, Hymenoptera Orientalia. 



thickly covered with long pale fulvous hairs, the scutellum 

 with only long hairs behind, and almost without punc- 

 tures ; the median segment, except a triangular space in 

 the middle at the base, thickly covered with rufo-fulvous 

 hairs, which completely hide the texture ; the triangular 

 bare space at the base opaque, rugosely aciculated ; with 

 an indistinct keel down its centre. The upper part of 

 the propleuras aciculated. Legs thickly covered with 

 pale fulvous hairs ; the calcaria white. Wings clear 

 hyaline ; the nervures dark fuscous ; the first recurrent 

 nervure is received shortly beyond the middle of the 

 cellule ; the second about the same distance from the 

 third transverse cubital nervure. The first and second 

 dorsal segments of the abdomen are covered with long 

 pale fulvous hairs ; the others have the hairs darker and 

 shorter, and the second, third, and fourth are fringed at 

 the apex with glistening white hairs ; the ventral segments 

 are broadly fringed at the apex with long pale hairs. 



Andrena gracillima, sp. nov. (PL 4, f. 19). 



Nigra; capite thorace abdominisque bast longe fulvo-hirtis ; 

 alis fumatis, basi fere hyalinis. 2. Long. 15mm. 



Hab. Mussouri (Rothney). 



Head deep black ; the occiput thickly covered with 

 long fulvous hairs ; the front with hairs almost as long, 

 but somewhat shorter. The front from the hinder ocelli 

 closely longitudinally striated ; a sharp keel runs down 

 from the ocelli ; the clypeus shining, the punctures close 

 at the base, becoming more widely separated towards the 

 apex ; which is in the middle almost free from them ; the 

 apex slightly projecting. Antennae black ; the flagellum 

 almost glabrous ; the fifth and following joints brownish 

 beneath. Pro- and meso-thorax and the median segment 

 punctured ; the scutellum with the punctures more widely 

 separated, especially in the middle at the base ; the 



