30 Mr. F. Smith on some new species of Exotic Hymenoptera. 



In the cabinet of the British Museum, and also in that of 

 W. W. Saunders, Esq. 



M.fasciata, n. sp. 



Female (length 6 lines) black : head smooth and shining ; the 

 thorax entirely red ; anterior wings dark fuscous, the posterior 

 pair subhyaline; a white fascia on the anterior pair, crossing 

 from the first submarginal cell and being of the same width. 

 On the apical margin of the first and third segments of the ab- 

 domen is a broad golden band, which is deeply emarginate in 

 the centre ; a marginal band on the fifth, and the sixth segment 

 entirely clothed with golden pile; beneath clothed with short 

 silvery pubescence. 



Note. — The second segment of the abdomen has an impressed 

 line down the centre, and its margin is notched to the depth of 

 half its width. 



Although after a careful examination I consider this peculiar 

 conformation to be natural, and not an accidental deformity; 

 still, in the absence of other specimens, I place it in a note, which 

 may serve to call particular attention to such a remarkable for- 

 mation. 



I have only seen the single specimen in the British Museum. 



Genus Larraxena, n. gen. 



Head a little wider than the thorax, depressed in front, the 

 anterior stemma situated in a frontal depression, the posterior 

 pair obsolete ; eyes lateral, slightly approximating at their ver- 

 tex; antennae filiform, the basal joint very much incrassated, 

 inserted at the base of the clypeus which is transverse, the man- 

 dibles arcuate ; thorax ovate, the metathorax elongate, truncated 

 posteriorly ; the anterior wings with one marginal cell, appendi- 

 eulated, and three submarginal cells ; the second triangular and 

 petiolated, receiving the two recurrent nervures; the first sub- 

 marginal cell equal to the second and third united, the third 

 narrow and oblique, the legs moderate in length, all the tibiae 

 and tarsi strongly spinose, the tarsi longer than the tibiae ; ab- 

 domen elongate-ovate. 



L. princeps. 



Female (length 8 lines) black : the head deeply and closely 

 punctured, the face and cheeks covered with a silvery pubescence, 

 the mandibles ferruginous, black at their base and apex ; the pro- 

 and meso-thorax shining and closely punctured; the metathorax 

 opake, finely granulated ; down the centre a slight depression, 

 which has a central carina reaching nearly to the apex ; wings 

 dark fuscous, their tegulae piceous, the tarsal claws ferruginous. 



