JAMES CHESTER BRADLEY 
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15. Transverse diaineter of posterior ocelli about one-third greater than their 
distance from the eyes elegantula Cockerell and Casad 
Transverse diameter of the posterior ocelli ecjual to their distance from the 
ej'es indiscreta Fox 
16. First abdominal segment petiolate, long and slender, the anterior linear 
jjortion longer than the slightly swollen posterior portion; propodeum 
al)normally long and low, without sculpture and without boundary 
between its dorsal, posterior, and lateral faces. Large and slender 
species (17) 
First abdominal segment petiolate or sessile, but comparatively short, the 
anterior narrowed portion always shorter than the strongly .swollen 
posterior part, often very short. Species usually smaller and more 
robust (18) 
17. Head .4 wider than minimum distance between the tegulae; petiole, 
viewed from the side, evenly and but slightly enlarged posteriorly, four 
times as long as its greatest dorso-ventral thickness; mandible without 
a Carina on the upper surface at base; Rg not meeting r-m at an angle, 
the cell Rs therefore triangular; color dark castaneous. Length, 20 mm. 
protracta new species 
Head one-tenth wider than minimum distance between the tegulae; peti- 
ole suddenly widened toward its apex, three and one-half times as long 
(measured along the side) as its greatest dorso-ventral thickness; each 
mandible with a strong carina along its upper surface arched into a tooth 
near its base; Rg meeting r-m at an angle, the cell Rs therefore four- 
sided; color brownish yellow. Length, 14 mm ampla (Blake) 
18. Posterior tibia with a row of from two to five stout spines along the pos- 
terior edge; middle tibia with a group of stout subapical spines on the 
outer surface. Length, 14 mm (19) 
Posterior tibia unarmed; middle tibia with spines fewer and inconspicuous 
or wanting (21) 
19. Diameter of the posterior ocelli one-third greater than their distance from 
the e}Ts; longer posterior tarsal spur two-thirds as long as the meta- 
tarsus. Color castaneous, head a little darker alcanor (Blake) 
Diameter of the posterior ocelli not exceeding their distance from the com- 
pound eyes; longer posterior tarsal spur one-half as long as the meta- 
tarsus (20) 
20. Head black; sagittae slender and pointed. . ioachinensis new species 
Head concolorous; sagittae thick and blunt nitida (Cresson) 
21. Basal abdominal segment dorsally not at all constricted from the second, 
laterally scarcely or not at all so, short, thickened, and without anterior 
neck ; color brownish orange or castaneous with the head darker or black. 
( 22 ) 
Basal abdominal segment strongly constricted dorsally and laterally from 
the second, short or long, with or without an anterior neck; size and 
color various (23) 
TR.\NS. AM. ENT. SOC., XLIII. 
