108 Cameron, Hymenoptcra Ovientalia. 



Head below and between the antennae thickly covered 

 with white hairs, the front and vertex more sparsely- 

 covered with long fuscous hair ; the vertex opaque, 

 coarsely shagreened; the apex of the clypeus and labrum 

 yellowish-white ; the palpi fuscous ; the scape of the 

 antennas and the second joint entirely black ; the others 

 black above, brownish beneath. Pro- and meso-notum 

 shagreened, bearing a short pale down ; a narrow longi- 

 tudinal furrow down the centre of the mesonotum at the 

 side ; the scutellum uniformly shagreened like the meso- 

 notum ; the post-scutellum rugose, covered with long pale 

 hairs. The curved basal area on the median segment 

 shining, irregularly longitudinally carinate, the keels less 

 distinct in its centre. The pleurae closely longitudinally 

 striated ; the part below the hind wings covered with 

 long white hairs ; the propleurae and the pronotum in 

 front shining, glabrous, impunctate ; and sharply separated 

 obliquely perpendicularly behind. Wings clear hyaline, 

 the nervures pale yellowish ; the second and third cubital 

 cellules almost equal in length at top and bottom ; the 

 first recurrent nervure is almost interstitial ; the second 

 is received in the apical third of the cellule. Abdomen 

 shining ; the basal segment, except at the apex, covered 

 with long white hairs and without a longitudinal furrow ; 

 the segments at the apex fringed with white depressed 

 hairs ; the ventral segments bearing long white hairs ; the 

 penultimate segment shining and smooth in the middle. 



Halictus alphenus, sp. nov. 



Nigro-ccendeus ; abdomine nigro; femoribus subtus piceis ; 

 pedibus longe albo-fumatis. <S . Long. 6 — 7 mm. 



Hab. Mussouri (Rothney). 



Head and thorax dark blue; the clypeus black. Head 

 obscurely shagreened, covered with long fuscous hairs ; 

 the base of the mandibles piceous. Antennae entirely 



