374 p. CAMKRON. 



to the apex ; the spiracles are placed half way between the middle 

 and apex. Gastracoeli indistinct. The abdomen is twice the length 

 of the thorax ; the 2nd and 3rd segments are closely but not strongly 

 punctured ; there are 7 segments ; the last is large, two-thirds of the 

 length of the preceding and is equally developed above and below ; 

 the ventral keel is largely developed on the 2nd, 3rd and 4th seg- 

 ments. The valves of the ovipositor are short and broad. 



Seen from the side the median segment is broadly rounded from 

 the base to the apex, the centre being broadly raised ; it is more 

 than half the length of the mesothorax ; the petiole viewed laterally 

 is broadly curved upwards ; the abdominal segments are all longer 

 than broad and are distinctly separated ; they are not compressed 

 laterally ; the petiole is distinctly longer than the hind coxse and 

 trochanters ; the areolet is distinctly closed ; the apical nervures in 

 the hind wings are obsolete ; the antennae have over 30 joints. 



Belongs to the Stilpnini, but cannot be well confounded with any 

 known genus in that group. The long abdomen and the short wings 

 are characteristic. 



Jethsura ferriiginea sp. ruov. 



Ferruginous, the edges of the median segment black ; the flagellum of tlie an- 

 tennae black, banded with white in the middle ; the wings hyaline; the stigma 

 and nervures fuscous, 9- Length 8; wing expansion 12 mm. 



Scape of antennae rufous; the basal joints of the flagellum dark rufous; the 

 8-14 joints white, Vertex almost smooth ; the frontal depression closely trans- 

 versely striated ; the face and base of clyi)eus punctured. Mandibular teeth 

 black. Prothorax closely punctured; the propleurse irregularly striated at the 

 apex. Mesonotum closely and distinctly punctured. Scutellum smooth, its sides 

 yellowish. Median segment closely and rather strongly punctured; there are 3 

 areae on the apical slope; the central is broadly rounded above; the lateral are 

 lanceolate above. Meso- and raetapleurse closely and distinctly punctured. 

 Wings clear hyaline. Abdomen smooth and shining; the 2nd, 3rd and 4th seg- 

 ments minutely punctured. Legs, if anything, paler in tint than the body ; the 

 hinder femora are not much longer than the coxae and trochanters united. 



Hab. — New Mexico. 



SPHEGID.E. 



Alysoii petiolatUM sp. nov. 

 Length 5 mm, %. — Head black; face, clypeus, the part between the antennae 

 the mandibles and the inner orbits to near the middle of the eyes, yellow. The 

 front closely and minutely punctured; the centre with a shallow furrow ; the 

 vertex is almost imjjuuctate, The scape is yellow below ; the flagellum is brown- 

 ish ; the 3rd joint is nearly as long as the 4tli ; the incision on the ajjical joint is 

 rather slight. The thorax towards the apex has a faint bluish tinge; there are 

 two lines on the centre of the pronotum and one near the tegulae, and there are 

 two large marks, narrowed on the inner side, on the base of the scutellum. Meso- 



