ANALYTICAL TABLE. 



pa';e 



a. Wings smoky, with violet iridescence 

 6. Wings transparent or yellowish .... 98 

 * Second abdominal segment without lateral yel- 

 low spots 98 



** Second abdominal segment with a yellow spot 



on each side (sometimes wanting in variety) 101 

 *** Second abdominal segment having on each 

 side a yellow fascia, or a complete transverse 

 yellow band on its middle .... 102 



c. Species of uncertain origin ..... 105 



Division Zeta ......... 105 



Gen. Montezumia Sauss. ....... 110 



Division Antezumia. Head flattened before. Abdomen 

 pediculate. (Appearance nearly like some Pachy- 



menes) 113 



Division Metazumia ....... 114 



Division Montezumia (propr. diet.) .... 117 



1. Abdomen pediculate ...... 117 



2. First segment of the abdomen subsessile . . 118 



A. Thorax moderately lengthened, first abdominal 



segment funnel-shaped, convex, divided by a 

 feeble groove. Vertex somewhat swollen . 118 



a. Wings transparent or ferruginous . . . US 



b. Wings obscure, smoky, fuscous or black . . 119 

 * Body more or less ferruginous . . .119 

 ** Body quite black 124 



B. Head strongly dilated on the vertex behind the 



eyes. Thorax much lengthened. First segment 

 of the abdomen depressed or flattened above 

 and divided by a very distinct groove . . 127 

 Division Parazumia ....... 127 



Division Pseudozumia ....... 127 



Gen. Monobia Sauss 129 



Division I . . . . . . . . .129 



A. Metathorax bispinose . . . . • .129 



B. Metathorax rounded, unarmed .... L32 

 Division II ........ 132 



A. Abdomen conical ; the first segment wide and trun- 



cate. Hinder portion of the luetathorax bordered 

 by trenchant ridges ami armed on each side with 

 a dentiform angle . . . . . .132 



B. Abdomen ovalo-oonioal : the first segment more 



rounded, less truncate, less sessile. Metathorax 

 rounded ; its concavity not bordered above by 

 trenchant ridges 134 



