AMERICAN HYMENOPTERA. 123 



fifth segments piceous black, apical segments pale yellowish. Legs dark fuscous, 

 trochanters, sutures and apices of tarsi paler. Ovipositor as long as first and 

 second segments together, ferruginous. 



Described from one female specimen collected at Austin, Texas, 

 May, 1902. 



This species resembles Pettitii, but is smaller and has a differently 

 formed abdominal petiole. 



Pezomachus crassulus sp. nov. 

 Female. — Length 4.5 mm. Large and stout, ferruginous, slightly infuscated on 

 the abdomen. Head ferruginous, slightly darker on the occiput, rather finely 

 punctate and not at all shining, very sparsely silvery pruinose. Face, consider- 

 ably produced just at the base of the antennae. Mandibles deep yellow, black at 

 the tips; palpi rufous. Antenna 3 short, stout (broken), thickened toward the 

 tips and probably reaching about to the base of the second abdominal segment. 

 Rufous at base, paler and with dusky incisures toward the tip; with at least 23 

 joints. Thorax short and stout, less strongly bilobed than usual, the lobes of 

 equal length, ferruginous. Mesonotum sculptured like the head. Metanotum 

 indistinctly areolated in front, distinctly so behind. Petiole gradually widened 

 out towards its apex, the lateral tubercles not prominent; longitudinally acieu- 

 lated above and sparsely covered with sericeous pubesence. Abdomen very 

 shining, sparsely punctulate and thinly pubescent; broadly oval; ferruginous 

 except at the base of the second and third segments where it is slightly infus- 

 cated. Legs dark ferruginous throughout. 



Described from a single female collected under a stone at Austin, 

 Texas, daring April, 1902. 



This tine species resembles unicolor Cress, in color, but is readily 

 separated by the characters given in the table, and by its opaque 

 head and thorax. 



I'ezomaclius Wlioeleri sp. nov. 

 Female. — Length 3.5 mm. Rather stout, black, with reddish markings. Head 

 large, black, finely punctured, mandibles black ; palpi testaceous, cheeks smooth 

 and very shining, face not produced at the base of the antenna?. Antenna? pice- 

 ous, paler towards base, especially below ; 20-jointed. Thorax strongly bilobed ; 

 anterior lobe dark ferruginous, with darker humeral marks; posterior one black : 

 slightly ferruginous on the anterior upper face. Posterior lobe longer and more 

 convex. Mesonotum slightly longitudinally impressed medially, metanotum 

 smooth, very finely shagreened, with a delicate carina laterally, which is inter- 

 rupted above. Abdominal petiole very short and broad, gradually dilated to the 

 apex, dark rufous. Its lateral tubercles not at all prominent; abdomen very 

 broad behind the petiole, regularly oval ; shining black, except for the narrow 

 dark yellow border of the second segment and a faint trace of narrower light 

 borders on the third and fourth segments. Ovipositor exceeding the apex of the 

 abdomen by the length of the petiole. Its sheaths pale at base and piceous at 

 tips. Legs piceous, the trochanters, knees, anterior tibise at tip, and all the tarsi 

 more or less rufo testaceous. 



TRANS. AM. ENT. SOC, XXIX. MARCH. 1903. 



