96 Cameron, Hymenoptera Orieiitalia. 



the postscutellum is hollowed and bordered by a semi- 

 circular keel. The median segment has at the base a 

 transverse keel, from the centre of which runs a longitu- 

 dinal one to near the middle of the segment ; outside this 

 a stout keel runs from near the base to the apex ; on the 

 apical half at the sides is a stout longitudinal keel. Pleurae 

 shining, impunctate; on the lower part of the meso- is a 

 longitudinal furrow. The base of the mesosternum is 

 oblique and is keeled at the sides and below ; on the apex 

 in the middle is a large, triangular depression. Legs 

 coloured like the thorax ; the front pair paler ; the tibiae 

 and tarsi thickly covered with fulvous hair. The apical 

 cloud in the fore wings extends from the second cubital 

 cellule to the apex ; at the base of the stigma and 

 extending on to the costa is a deep black cloud, which is 

 longer than its breadth ; the branch on the second trans- 

 verse cubital nervure issues from above the middle and is 

 twice as long as the transverse cubital nervure, but becomes 

 fainter towards the apex. The basal segment of the 

 abdomen is depressed deeply at the base and apex ; the 

 sides sharply keeled ; the apical depression, the apex of 

 the petiole and the second and third segments are strongly 

 longitudinally striated ; the others are smooth ; the apex 

 of the petiole and the basal half of the second segment, 

 the apex of the third in the middle and the apical segments 

 are black, smooth and shining. 



Microbes fumipennis, sp. nov. 



Niger ; prothorace, viesonoto, mesopleiiris supra pedibus- 

 que anterioribus riifis ; alls fumatis, stigmate nigro. ? . 



Long. 8 mm. 



Antennae as long as the body ; black, thickly ccvered 

 with short, black hair. Head black ; the part between 

 the lower part of the eyes and the base of the mandibles 



