110 PROCEEDINGS OF THE ACADEMY OF 



Scutellum conical, apex obtuse : 



Yc'UoAV ; vertex, occiput, three elong:otc marks on mesotliorax, antennne 

 and posterior tibi.T and tarsi black 72. Montezuma. 



Yellow ; base of abdominal segments with a narrow black band ; 

 mcsothorax with three longitudinal black lines ; posterior tarsi 

 black 73. exquisitus. 



Entirely honey-yellow ; anteunte black 74. abactus. 



Scutellum conical, apex aciite : 



Honey-yellow ; head and antenujB black, marked with wliite. 



7o. occiputalis. 

 Black and yellow or white species : 

 31esothorax black, with central yellow spot ; metathorax with two 



central stripes 77. scutellaris. 



Mesothorax entirely black ; metathorax with two black spots at base 

 above, sometimes connected ; posterior legs honey-yellow. 



70. esurialis. 

 Mesothorax entirely dull black, opaque ; metathorax and posterior 



femora black 78. simulans. 



Mesothorax black, with three short whitish lines, the anterior one 

 broad ; metathorax blackish above ; posterior femora j-ellow, 

 their tibiae and tarsi black 79. acclivus. 



Scutellum mucli elevated, ollique, apex with transverse edge : 

 Metathorax with prominent spines : 

 Yellow ; abdominal segments Avith very narrow black band at base ; 

 metathorax entirely yellow ; antennte and posterior tibia^ and 



tarsi black 80. aztecus. 



Black above ; abdomen with broad black bands ; metathorax with 



two sub-basal black spots 82. lenis. 



Metathorax rounded, Avithout spines : 

 Metathorax with two sub-basal black spots, connected to base by 



slender line 81. tragicus. 



Metathorax with arcuate black line above 83. infulatus. 



Scutellum Mspinose 84. abnormis. 



1. Iclmeumon conicus. 



Juppn cohica, BruUe, Ilymeu. iv. 2SG. (?) Cressou, Trans. Am. Ent. 



Soc, ii. 29. 

 ? Ichneumon breviventris, Cresson, Proc. Ent. Soc. Phil., iv. 12. 



?. Black, opaque ; palpi pale; antcnnai with wliite annnlus; 

 wings h^-aline, nevvures black ; legs yellow, apex of intermediate 

 femora above, and tips of their tarsi, fuscous ; posterior coxaj, 

 apical half of their femora and apex of their tibia-, black ; abdo- 

 men beyond third segment, and venter yellow. Robust, densel}' 

 and coarsely punctured, subpubcscent ; head large, buccate; an- 



