No. 2317. FIVE TRIBES OF ICENEUMONINAE—ROHWER. 433 



Heavily chitirdzed part of first sternite terminating beyond or at a line drawn 

 tangent to the posterior margin of spiracle of the first tergite ; carinae dividing 

 meta-ple\ira and -sternum complete to the fossae of hind coxae; abdomen 

 narrower 18. 



17. Black; second and third tergites coarsely coriaceous; apical joint of hind tarsi 



black harringtoni Rohwer. 



At least the head with ferruginous marks; second and third tergites finely trans- 

 versely aciculate; apical joint of hind tarsi concolorous with preceding. 



catomus (Davis). 



18. Four posterior tibiae unicolorous; lateral dorsal angles of propodeum tuberculate, 



but the tubercle is not as long as basal width 19. 



Four posterior tibiae with white annulus at base; lateral dorsal angles of propo- 

 deum with a long tubercle or spine which is at least twice as long as basal 

 width 20. 



19. Ferruginous; apical joint of hind tarsus concolorous with the preceding; wings 



strongly brownish califomicus (Cresson), 



Black; apical joint of hind tarsus black, the preceding white; wings nearly hyaline. 



cincticornis (Cresson). 



20. Ferruginous; apical joint of hind tarsus concolorous with the preceding. 



floridanus (Ashmead). 

 Black; apical joint of hind tarsus black, the preceding joint white. 



stigmapterus (Say). 



21. Tibia unicolorous 22. 



Tibiae with pale annulus at base 23. 



22. Apical joint of hind tarsus black, the preceding whitish; body and legs black. 



cincticornis (Cresson). 



Apical joint of hind tarsus concolorous with the preceding; ferruginous, especially 



the head, legs and abdomen califomicus (Cresson). 



23. Lateral dorsal angles of propodeum with a short tubercle hamngtoni Rohwer. 



Lateral dorsal angles of propodeum with a prominent tooth stigmapterus (Say). 



Gronp HUMERALIS. 



Group characters. — ^Elongate species. Facial quadrangle longer than 

 wide; posterior orbits with antro-posterior striae; frons with large 

 close punctures; vertex almost without sculpture (except at occiput); 

 antennae of male clothed with long hair; lateral dorsal angles of 

 pronotum strongly tuberculate; prescutum with a distinct median 

 longitudinal depression ; propodeum with coarse punctiu-es, basal area 

 triangular and separated from the areola by a longitudinal carina; first 

 tergite not constricted medianly, about three times as long as apical 

 width, without carinae; the chitinized part of the sternite ending 

 well before a line drawn tangent to the posterior margin of the spiracle 

 in the female and somewhat beyond in the male; second tergite dis- 

 tinctly longer than its apical width; base of third tergite of male 

 without a triangular-shaped area laterally; the first three tergites 

 with large close punctures. Black or dark piceous, without white 

 markings; four anterior legs usually paler than the posterior ones; 

 posterior tibia with a whitish annulus at base; antenna of male 

 black, of female with a white annulus. 



144382— 20— Proc.N.M.vol.57 28 



