May, 'Oy] ENTOMOLOGICAL NK\VS. 2O5 



2. Lateral margin of the lobes of the eight ventral abdominal segments 



curved ; clypeus with two lateral teeth calcaratus. 



Lateral margin of the lobes of the eight ventral abdominal segments 

 straight ; clypeus with three lateral teeth . . . calcaratiformis. 



3. Pubescence of the pygidium bronzy propinquus. 



Pubescence of the pygidium golden or with a golden tint 4. 



4. Front with golden pubescence (scutellum slightly impressed). 



dubitatus. 

 Front with silvery pubescence .5. 



5. Scutellum impressed ; pubescence of pygidium bright golden. 



calcatus. 



Scutellum not impressed ; pubescence of the pygidium with a silvery 

 appearance calcaratiformis. 



Tachytes obscuranus n. sp. 



? Length 8 mm. Anterior margin of the clypeus gently rounded, at 

 the sides with a very large tooth, outside of these large teeth are two 

 very small teeth ; about half-way up on the clypeus and directly above 

 each of the large lateral teeth is a tooth-like projection ; inside of the 

 tooth-like projection is a smaller one ; clypeus is closely punctured. A 

 distinct shining line from lower ocellus to base of antennae. Front 

 sparsely punctured ; interocellar area closely punctured ; vertex with some 

 large punctures near the orbits, the rest finely tessellated. Occiput seen 

 from the front slightly depressed ; the middle line of the vertex distinct. 

 Space between the eyes at the vertex not as great as the length of the an- 

 tennal joints 2+3. Scape long, narrow, more like Tachysphex ; anten- 

 nal joints 3, 4 and 5 of equal length. Dorsulum closely punctured. Scu- 

 tellum a little more sparsely so ; not impressed. Metanotum somewhat 

 shining, very finely sculptured, the middle line distinct, at the apex it 

 broadens into a shining, triangular fovea ; posterior face with an elongate 

 fovea ; metaplurae shining. Legs rather strongly spino^e ; spines on the 

 posterior tibiae pallid, long, acute ; longer spur of posterior tibiae as long 

 as the basitarsus. Radial cell rounded at the apex ; second cubital a 

 little broader on the radius than third cubital Abdomen dorsally finely 

 tessellate ; second ventral segment mostly closely finely punctured or 

 tessellate ; third and fourth segments with large punctures Pygidium 

 sparsely penctured with large punctures. Black ; mandibles, spot on 

 scape beneath, apical joints of tarsi rufous; tegulae ferruginous. Front, 

 clypeus, femora, tibiae, plurae, pectus, abdomen dorsally (more strongly 

 so on the apical margins) with dense silvery pubescence; metathorax 

 with long white hairs. Pygidium rather sparsely clothed with silvery 

 hairs. Wings hyaline, slightly yellowish, iridescent ; venation ferruginous. 



<3\ Length 7 mm. Clypeus very slightly produced medially, with the 

 lateral angles a little produced so as to give it a wavy appearance. Emar- 

 gination of the fore femora beneath shallow. Spine on the fore coxae 

 short, with a long white bristle at the apex. Emargination of eight ven- 



