1920] Ball: Review of the Genus Gypona 99 



It is possible that the study of hfe histories or of more 

 abundant material will show that this and the two preceding 

 species are but variations of a single species which will then be 

 called dohrni Stal. 



6. Gypona (Ponana) marginifrons Fowl. 



This testaceous brown species with its broad, short vertex, 

 dark spots and lines on the anterior part of pronotum, and light 

 elytral nervures narrowly margined with brown is a strikingly 

 distinct and easily recognized species. 



The female segment is short w4th acutely produced lateral 

 angles, between which the posterior margin is obtusely angularly 

 produced and black tipped. 



The writer took this species at Dolores, Colorado, feeding on 

 Rhus trilobata or a closely related species and other examples 

 are at hand from Arizona. Gibson reports it from New Mexico, 

 while it was described from males taken in Mexico. 



Fowler places this species in his group with f oliaceous vertices 

 although his own description and figures show that it belongs in 

 the other group, in fact, it is closely related to the species with 

 the shortest and most rounding heads. 



7. Gypona (Ponana) resima Fowl. 



Gypona hipimctulata Gib. (not Woodw.); (?) Gypona celata Fowl.; {Gypona inter- 

 texta Uhler Mss.) 



This pale cinnamon brown species can be readily separated 

 from all others in our fauna by the short, obtusely rounding 

 vertex with the widely separated ocelli placed just back of the 

 rounding margin. It resembles marginifrons but lacks most of 

 the pronotal markings; varying from none to two behind each 

 eye, the outer one large. The veins are definitely brownish 

 and the cross veins are slightly marked with fuscous. All the 

 specimens examined from our territory have been from Georgia, 

 Florida and Mexico and it is probably limited to a narrow gulf 

 area in the United States. 



Fowler describes resima without spots on pronotum but he 

 had only female examples, while celata was described from 

 females from Central America as with or without pronotal 

 spots. Gypona nana Fowler which appears to be closely related 

 is described as with or without spots. 



