A"oL. 1] Bradley. — The Taxonomy of the Masarid Wasps 409 



3. Eyes reaching the posterior margin of the head, closer together than or 



about as close together as the distance between the posterior ocelli, these 



touching the eyes or very nearly so (Holopticus).(4:) 



Eyes not reaching the posterior margin of the head, at least twice as far 

 apart as the distance between the hind ocelli; these not touching the 

 eyes (Pseudomasaris).(8) 



4. Eyes separated by from three-quarters to one and one-half times the 



diameter of a posterior ocellus; fourth segment of antenna linear; 

 process of third ventral segment with a broad longitudinal fossa on 

 its summit, without two teeth in front, and without a posterior tooth... .(6) 

 Eyes separated by twice or three times the diameter of a posterior 

 ocellus (5) 



5. Process of third ventral segment with a narrow longitudinal groove on 



its summit, two teeth in front, and a large sharp tooth pointing caudad 



behind; eyes separated by twice the diameter of a posterior ocellus 



bariscipus, n. sp. 



Process of third ventral segment with a broad fossa on its summit much 

 widened anteriorly, the process without teeth in front and obtuse be- 

 hind; eyes separated by three times the diameter of a posterior ocellus 

 phaceliae Rohwer. 



6. Eyes separated by less than the diameter of a hind ocellus (7) 



Eyes separated by about one and one-half times the diameter of a hind 



ocellus; front femur black and yellow rohweri, n. sp. 



7. Anterior femur brown with a white area beneath at apex; sides of pro- 



podeum weakly angled, not alate nor mucronate albifrons Rohwer. 



Anterior femur usually entirely red or reddish yellow w^ithout an apical 



white spot; side of propodeum subulate and mucronate 



texanus (Cresson). 



S. Sixth and seventh antennal segments not flattened beneath, the sixth 

 cylindrical or slightly widened at apex, the club convex beneath, 

 middle femur and tibia or the tibia only strongly contoi'ted and con- 

 cave beneath (9) 



Sixth and seventh antennal segments flattened beneath, strongly widened, 

 the club concave beneath; middle femur concave beneath, with a 

 tubercle near the apex, the tibia slightly irregularly concave beneath 



margtnalis (Cresson). 



9. Middle femur and tibia both strongly contorted and concaved beneath; 



seventh segment of the antenna three-quarters as wide as long (10) 



Middle femur with the inferior surface evenly rounded, the tibia on its 

 outer lower edge strongly produced and angled on the basal third; 



seventh segment of the antenna one-half as wide as long 



occidentalis (Cresson). 



10. Antenna evenly and not strongly clavate from the sixth segment to the 

 apex, forming a slender oval club; middle tibiae weakly ridged be- 

 neath coquilletti Rohwer. 



Antenna with the club broadly ovate, strongly differentiated from the 



rest of the flagellum; middle tibia strongly ridged beneath 



zonalis (Cresson.) 



