XXV1U ANALYTICAL TABLE. 



PAGE 



a. On each side of metathorax a dentiform angle . 134 



b. Metathorax without distinct spiniform angles . 137 

 C. Abdomen slightly fusiform, enlarging as far as the 



extremity of the 2d segment ; the 1st segment a 

 little funnel-shaped, divided by a feeble longitu- 

 dinal groove. Thorax lengthened . . . 137 



Gen. Nortonia Sauss 139 



Gen. Rhynchium Lair 142 



Gen. Odynerus Latr. ........ 143 



Definition of the subgenera ...... 149 



Subgenus Symmorphus Wesm. ...... 151 



a. Segments 1-4 of the abdomen bordered with yellow 152 



b. Segments 1, 3, 4 of the abdomen bordered with yellow 153 



c. Segments 1, 2 only, of the abdomen bordered with 



yellow ......... 155 



Subgenus Ancistrocerus Wesm 157 



Division Ancistrocerus (properly speaking) . . . 157 

 Table to assist in the determination of the species of 



Ancistrocerus ....... 158 



I. Metathorax having its concavity angulate, bordered 



all around by trenchant ridges . . . 159 



A. Form lengthened, slender .... 160 



B. Form still lengthened, but less slender . . 163 



C. Body more gathered, normal, but the thorax 



still sensibly longer than wide . . .167 



a. Metathorax destitute of strong spines . . 167 



b. Metathorax having two strong spines . .173 



D. Form very stubbed. Thorax cubical, nearly 



as long as wide ...... 175 



II. The concavity of the metathorax forms no distinct 



lateral angles ...... 177 



A. Posterior face of metathorax remaining mar- 



gined, but without distinct angles. Body 

 slender, elongate . . . . .177 



a. Post-scutel strongly truncate . . . 177 



b. Post-scutel not truncate, angulate posteriorly 179 



B. Metathorax not distinctly marginate. Body 



not slender, of normal form . . .180 



a. Abdomen nearly conical. The border of the 



2d segment not reflexed. Body velutiuous ISO 



b. Abdomen more ovalo-conical ; the border of 



2d segment rugose or rellexed . . . 1S1 



