198 Mr. R. E. Turner on Fossorial IJymenoptera. 



15. Sphex [Isodontia) permutans, sp. n. 



2 . Nigra, aureo-pilosa, alis subhyalinis, apice infumatis ; man- 



dibiilis apico bidentatis. 

 Long. 17 mm. 



? . Mandibles slender, bidentate at the apex ; clypeus 

 slightly emarginate at the apex, with a longitudinal caiina 

 from the base almost reacliiiig the apex, the extreme apical 

 margin de])ressed. Eyes distinctly converging towards the 

 clypeus and also towards the vertex, leaving tiie inner margin 

 curved, the distance separating them on the vertex scarcely 

 greater than that separating them on the clypeus ; posterior 

 ocelli as far from each other as from the eyes. Second joint 

 of the flagellum very slightly longer than the third, the 

 fourth no longer than the third. Head, thorax, and median 

 segment very minutely and closely punctured, clothed with 

 pale golden pubescence on the clypeus, front, cheeks, meso- 

 pleuras, pronotum, lateral and apical margins of the meso- 

 notum, postscutellum, and sides of the median segment. 

 Petiole almost as long as the two basal joints of the poste- 

 rior tarsi combined. Second abscissa of the radius nearly 

 half as long again as the third and a little longer than the 

 secojid transverse cubital nervure. First recurrent nervure 

 received at two-thirds from the base of the second cubital 

 cell, second at about one-tenth from the base of the third 

 cubital cell. 



Hah. Wataikwa River ; August, 2 $ ? . 



Nearly allied to egens, Kohl, from Xew Britain, which it 

 resembles in the convergence of the eyes both towards the 

 clypeus and the vertex. It differs, however, in the length of 

 the fourth joint of the flagellum, which is very long in egens, 

 but only of ordinary length in the present species. The 

 male only of egens is described, but I do not think that this 

 difference is sexual. 



IG. Larra corrugala, sp. n. 



cJ . Niger, subnitidus, segmeuto modiano transverse striate; nlis 



subhyalinis, iridescentibus, dimidio apicali obscuriorc. 

 Long. 7 mm. 



(^ . Mandibles deeply excised on the outer margin ; clypeus 

 broadly subtruncate at the apex and clothed with tine wiiitish 

 })ubescence. Second joint of the flagellum a little longer 

 than the third, but not as long as the first and third com- 

 bined, about twice as long as the breadth at the apex ; the 



