•94 Cameron, Hymcnoptcra Ovientalia. 



Head black, very densely covered with grey pubescence, 

 longer and slightly sparser in front ; short and very dense 

 behind, completely hiding the surface ; the labrum fringed 

 with long golden pubescence ; the mandibles ferruginous 

 at the apex, their base, on the outer side, covered with 

 short, close, white pubescence. Antennae black, slender, 

 the scape sparsely covered with short white hairs. Thorax 

 densely covered with soft white hairs ; the mesonotum 

 closely but not deeply punctured ; the hairs on the post- 

 scutellum shorter and covering it entirely ; the base of 

 the median segment closely, irregularly striolated ; the 

 hairs on the pleurae long and thick. Legs black ; the 

 femora dark piceous ; covered with long white hairs, those 

 on the hinder femora being especially long; on the hinder 

 tibiae and tarsi they have a fulvous tinge. The third 

 cubital cellule is nearly twice the length of the second 

 at top and bottom. Abdomen shining, impunctate ; the 

 basal segment and the basal half of the second red ; the 

 basal segment at the base covered with long white hairs ; 

 the others fringed with white pubescence ; the ventral 

 segments red ; the apical two black ; thickly covered with 

 long pale hairs. 



Halictus decorus, sp. nov. 



Niger ; abdominis basi late mfo ; tarsis testaceis ; alts 

 hyalinis. 2. Long, fere 5 mm. 



Hab. Mussouri (Rothney). 



Head with a slight greenish tinge ; the clypeus and 

 the lower part of the front thickly covered with white 

 pubescence ; the vertex with longer, sparser fuscous hairs ; 

 the mandibles ferruginous, the teeth blackish ; their 

 base sparsely covered with pale hairs. Antennae black, 

 brownish beneath from the fifth joint. Thorax black, 

 almost impunctate ; the pronotum thickly covered with 

 white hairs ; as is also the post-scutellum and the sides of 



