1920] Ball': Review of the Genus Gypona .' 85 



Subgenus Gyponana Nov. 



Resembling Gypona in size and form, but with the venation 

 of the elytra broken up into numerous irregular reticulations. 

 Vertex broad, flat, meeting the front in an acute angle the 

 margin foliaceous. Pronotum broad, transverse, striated, 

 elytra elongate, narrowing apically, the appendix very narrow, 

 entire apical area at least broken up into irregular reticulations. 



Type of the subgenus Gyponana octolineata Say. 



The more typical members of this genus are large, broad, 

 green species, with more or less of scarlet or yellow striping. 

 The amount of reticulation is very variable in some species, 

 while quite constant in others. 



Key to Species of Subgenus Gyponana. 



a. Costal margin of elytra with fine black dots; whole insect more or less 



peppered with scarlet and black points 1. dracontea, Gib. 



aa. Costal margin without black dots, whole insect green, often with red or 

 yellow lines, 

 b. Elytra subhyaline smooth, vertex sloping, segment rounding, black 



spots wanting 2. octolineata, Say 



bb. Elytra nearly opaque, strongly rugose, shining, vertex flat, female 

 segment rectangularly emarginate, iblack spots on pronotum and hinge 

 usually present 3. rugosa Spgb. 



1. Gjrpona (Gyponana) dracontea Gib. 



This small gray-brown species slightly superficially resembles 

 a gray form of Xerophlcea. It is by far the smallest of the group 

 in our fauna and is only known from Arizona. 



2. G5rpona (Gjrponana) octolineata Say. 



This is the commonest and most widespread species in our 

 fauna occurring from Canada to Florida, and from Nova Scotia 

 to California. It varies greatly in size, color and in amount of 

 reticulation and may be divided into varieties as enumerated 

 below. Its reticulate elytra will separate it from all other green 

 species but rugosa , from which the almost straight segment 

 and the striping will usually distinguish it. It is apparently a 

 very general feeder on different shrubs and trees. 



Var. octolineata Say. 



Green, washed with scarlet with definite scarlet stripes and 

 more or less scarlet on the heavy reticulations. 



Say described this species from Missouri and fixed the name 

 octolineata on this variety by describing the markings as scarlet 



