102 STUDIES IN NORTH AMERICAN MEMBRACID/E 



-. Dorsum more or less elevated, the surface with longitudinal 

 rugae which may become more or less reticulated ; apical 

 areole of the corium triangular, 2. 



2. Dorsum strongly elevated, compressed, with a deep median 

 sinus, 3, Entylia Germ. 



-. Dorsum but slightly elevated, a little sinuated before the 

 middle, 4, Publilia Stal. 



Genus Vanduzea Goding. 



This genus most closely resembles OpJiiderma but may be 

 distinguished by having but two contiguous nervures at the 

 base of the elytra in place of three as in that genus and the 

 terminal areole of the elytra is transverse, the bounding ner- 

 vure on its base running almost straight across the apex. The 

 costal areole only is coriaceous and punctured. In arquata, the 

 type species, and in vestita, the dorsum is broadly rounded 

 transversely ; in leeta it is carinated as in Cyrtolobus, while in 

 bajula it is carinated and deeply sinuated as in Evaslimeadea. 

 Canon Fowler in the Biologia has redescribed this genus as 

 Hypamastris. Dr. Goding described bajula from the female 

 as an Evashmeadca on account of its bilobate dorsum, and the 

 male as Evashmeadca arizonensis. Our species may be dis- 

 tinguished as follows. 



Dorsum transversely rounded, 1. 



Dorsum carinated, 2. 



1. Larger, 5 mm. ; costal areole coriaceous and puntured for 



nearly its whole length, 1, arquata Say. 



-. Smaller, about 4 mm. ; costal areole almost entirely hya- 

 line, concolorous, sparcely punctured toward its base, 



2, vestita Godg. 



2. Dorsal carina strongly sinuated, 5, bajula Godg. 

 -. Dorsal carina arcuated, not at all sinuated, 3. 



3. Female obtusely carinated posteriorly; pale yellowish with 



a lateral black lunule on either side, 



3, segmentata Fowl. 



Female acutely carinated; marked about as in Cyrtolobus, 



4, keta Godg, 



