Larriilie, Odynerus and ApidcV from Barrach'pwe. 129 



anterior calcaria pale te.staceou.<. The first cubital cellule at the top is 

 somewhat more than twice the length of the second, the first trans- 

 verse cubital nervure is oblique, straight ; the second recurrent nervure 

 is received almost in the middle of the cellule. Abdomen shorter than 

 the thorax, the basal three segments broadly banded with silvery 

 pubescence on the apices ; pygidium smooth and shining. 



Odynerus sibilans, n, s. 



Niger, flavo maculate ; clypeo flavo, nigro maculato, flagello an- 

 tennarum subtus rufo ; pedibus flavis, coxis, trochanteribus femori- 

 busque posticis nigris ; alls hyalinis, apice violaceis ^ . 



Long. 8 mm. 



Hah. BarrackpoPvE {Rothney). 



Antennae black, the scape yellow, the flagellum brownish beneath ; 

 head black, the clypeus, except a triangular black mark in the centre 

 at the apex, the lower inner orbits, the eye incision, an irregular broad 

 line across the vertex, dilated downwards in the middle and broadly 

 incised above, and all united together and the upper half of the outer 

 orbits, yellow. Front and vertex strongly rugosely punctured, the centre 

 of the front between the antennte shining and minutely punctured. 

 Clypeus broad above, rounded there, oVjliquely narrowed towards the 

 apex, sparsely punctured, the punctures rather large and deep, the 

 apex with a broad shallow incision. Mandibles rufous, yellow at the 

 base, the inner side black. Thorax black, closely and rather strongly 

 punctured ; the pronotum broadly above, a round spot below the 

 tegulte, scutellum, post-scutellum and the sides of the median segment 

 broadly yellow. Median segment rugosely punctured, the middle 

 stoutly keeled and transversely striated ; from the keel near the 

 top, a transverse, stout, slightly curved keel runs from either side. 

 Pleurag closely punctured, the base of the meso- and metapleurfe 

 smooth. Legs yellow, the fore coxae, the others behind, the trochanters 

 base of anterior femora and the posterior entirely, black. "Wings 

 hyaline, infuscated along the fore margin ; the apex violaceous, the 

 second cubital cellule is much narrower above, being not one-fourth 

 of the length of the third. Abdomen black, the apex of the petiole, its 

 sides broadly, a large mark on the sides of the second segment, its apex 

 broadly, the sides narrowly, the apices of the third and fourth and 

 the fifth and sixth in the middle, yellow. The ventral segments are 

 broadly yellow. 



There is an indistinct keel, more distinct on the sides 

 than in the middle, on the petiole behind the yellow mark. 

 TRANS. ENT. SOC. LOND. 1903. — PART I. (APRIL) 9 



