ANALYTICAL TABLE. XXIX 



c. Abdomen not as sessile; its first segment 

 distinctly narrower than the second, which 

 is in the shape of a hawk's bell, with a 

 reflexed margin. Metathorax not excavated 

 in the form of a wide cavity, but of a wide 

 channel ....... 188 



Division Stenancistrocerus . . . . . .189 



Table to assist in the determination of the species of 



Division Stenancistrocerus .... 191 



1. Form lengthened. Metathorax prolonged Horizon- 



tally behind the post-seutel, then truncate ver- 

 tically, etc. ....... 192 



2. Form very slender. Metathorax not so distinctly 



produced behind the post-scutel ; its con- 

 cavity large, etc 195 



A. First segment of the abdomen rather funnel- 



shaped or bell-shaped, truncate anteriorly . 195 



B. First segment of the abdomen in form of a pro- 



longed bell, rather squarely-rounded, about 

 as wide as the second segment, not con- 

 tracted before ...... 198 



a. First segment sharply truncate anteriorly . 19S 

 6. First abdominal segment more rouuded ante- 

 riorly, rather like a square bell . . 199 



3. Form slender, but the abdomen sometimes slender, 



sometimes ovoid, especially among the £ . 

 The first segment cupuliform, narrower than 

 the 2d, having the suture indistinct, often 

 presenting a transverse fluting bordered by 

 two traces of sutures. Concavity of the 

 metathorax generally small, its borders in- 

 distinct 206 



a. Suture of the first abdominal segment rather 



strong ; excavation of the metathorax some- 

 what distinctly margined .... 206 



b. Suture of the first abdominal segment not so 



strong. Excavation of metathorax having 

 its edges rounded, without precise limits . 209 

 Division Hypancistrocerus ...... 210 



Division Ancistroceroides . . . . . .211 



Subgenus Odynerus Latr. (sensu strictiore) . . . 212 

 Division Hypodynerus ....... 213 



Table to assist in distinguishing the species of the Divi- 

 sion Hypodynerus . . . . . .216 



