AMERICAN HYMENOPTERA. 247 



98. Enclosure of metathorax with the surface not strongly rugose nor provided 



with ridges 99. 



Enclosure of metathorax with the surface strongly rugose or at least provi- 

 ded with definite ridges 102. 



99. Aual fimbria brownish or gray 100. 



Anal fimbria fulvous 101. 



100. Head and thorax covered with long gray pubescence ; the enclosure micro- 



scopically tessellate ISirl welli Ckll. 



Head and thorax covered with yellowish pubescence; the enclosure granu- 

 lar (?) con vesa Prov. 



101. Head and thorax covered with long white pubescence, the latter almost bare 



dorsally; the enclosure slightly depressed, not so coarsely sculptured 



as the integument behind it delta Vier. 



Head and thorax covered with whitish pubescence, tinged above with yel- 

 low ; the enclosure granular riliosigusita Ckll. 



102. The enclosure bounded by a well defined ridge 103. 



The enclosure not bounded by a definite ridge or wall 104. 



103. Pubescence on thorax moderately long ; fimbria brownish. 



91 a rise form eoucolor Rob. 

 Pubescence short and feathery ; fimbria fulvous ... inula Rob. 



104. Smaller species (8 mm.). Apical margins of abdominal segments pale testa- 



ceous krigiana Ckll. 



Larger species (10-12 mm.) .105. 



105. Surface of enclosure strongly rugose 106. 



Surface of enclosure more or less regularly ridged 107. 



106. The pubescence on head and thorax in female ochraceous, to fulvous in male. 



Face in front of ocelli striate cratsegi Rob. 



The pubescence on head and thorax pale; the face before ocelli smooth, 

 shining and sparsely but definitely punctured heraelei Rob. 



107. Smaller (10 mm.). Enclosure of metathorax provided with small vermi- 



form plications Sigiimndi Ckll. 



Larger (12 mm.) 108. 



108. Enclosure irregularly subreticulately ridged subcomnioda Ckll. 



Enclosure with the basal area finely striate commoda Sm. 



109. Pubescence on abdoufen paler, either grayish or fulvous 110. 



Pubescence on abdomen at least in part black lis. 



110. Females 111. 



Males 113. 



111. Larger (13-15 mm.). The abdomen clothed with pale pubescence, which 



often forms thin apical fascise Ssty i Rob. 



Smaller (9-10J mm.) 112. 



112. Head and thorax above with pale fulvous pubescence; that on abdomen of 



the same color, short and thinly scattered, most dense towards apex. 



victimu Sm 

 Head and thorax above with pale whitish yellow pubescence; the abdomen 

 thinly covered with hoary pubescence; fimbria fulvous. 



liitesta Sm. 



113. Larger (9-12 mm.). Head broader than thorax 114. 



Smaller (8 mm.). Enclosure scarcely rugulose, not margined 115. 



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



