AMERICAN HYMENOPTERA. 245 



70. Pubescence quite dense on face and thorax above 71. 



Pubescence rather thin when compared to that of the species belonging to 



the alternate section 86. 



71. With bright ferruginous or fulvous pile 72. 



With the pubescence paler — some shade of testaceous, light ochraceous, gray 



or white 76. 



72. Robust, rather large species (12-17 mm.), with thoracic pubescence quite 



dense 73. 



More slender smaller species (10-12 mm.), with the thoracic pubescence 

 slightly less dense, ochraceous 83. 



73. Occiput and thorax above with ferruginous pubescence; anal fimbria black. .74 

 "Face, cheeks, occiput and thorax above with such pubescence; anal fimbria 



fulvuus 75. 



Occiput and thorax above with fulvous puhescence; anal fimbria sooty black 

 intermixed with ferruginous hairs nivalis Sin. 



74. Larger (14-17 mm.) ; with a black-appearing band between the tegulse. 



Hallii Dunning. 

 Smaller (13 mm.) ; without blackish bands between the tegulse. 



semirufa Ckll. 



75. Smaller (13-14 mm.) ; wings yellowish hyaline Belfragei Cress. 



Larger (15 mm.); wings reddish brown, with violaceous reflections. 



obscuripeniiis Sm. 



76. Females 77. 



77. Insects moderately large and robust (12-14 mm.) 78. 



7S. Anal fimbria sooty 79. 



Anal fimbria fulvous ... -84. 



79. Inclosure at base of metathorax strongly longitudinally plicate. 



ciipreol iuola Ckll. 



Inclosure at base of metathorax at most roughened, not at all longitudinally 



plicate SO. 



80. Abdomen rather free from hairs, smooth and shiny 81. 



Abdomen decidedly hairy throughout 82. 



81. Surface of abdomen smooth, polished ; hairs on face and head black ; the 



facial grooves lined with a silvery down uigl'ipes Prov. 



Surface of abdomen tessellate and well punctured; hairs on face and head 

 mixed with pale and black 82. 



82. Pubescence on the pleurae black; that on the face mixed with pale and black. 



carliui Ckll. 

 Pubescence on pleurae pale; that on face black only around the mouth. 



vicina Sm. 



83. Hair of face wholly black; area at base of metathorax more closely lugulose, 



narrower; tubercle small and emarginate or binodulose at apex. 



anogrre Ckll. 



Hair of face a little paler at sides and on occiput; area at base of metathorax 



roughened, not plicate, rather broad and long; tubercle with sloping 



sides and truncate at apex pluviali* Ckll. 



84. Pubescence on thorax above and the pleurae fulvo-ochraceous. 



Dunuiugi Ckll. 



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



