• 1920] Ball: Review of the Genus Gypona 95 



being inclined to be transverse lines and the spots on pronotum 

 are nearer the anterior margin than those in the preceding 

 groups. While intermediates of various kinds occur, the great 

 majority of the examples fall readily into the following varieties. 



Var. limbatipennis Spaiigb. 



Gypona albimarvjnnta Woodw. 



Vertex and pronotum fulvous, the narrow posterior margin 

 of the pronotum and all of scutellum and elytra, except the 

 narrow creamy costal margins, smoky brown or black. 



Spangberg described both sexes from Illinois. The writer 

 has taken dark nymphs from the base of buttercups in a damp 

 meadow in Iowa and obtained this species from them. Dr. 

 Marshall has taken it in Wisconsin and Gibson reports it from 

 New York. This form seems to be the rarest and shades 

 out into var pectoralis. 



Var. pectoralis Spangb. 

 Gypona hullensis Prov.; Gypona bimaculata Wood.: Gypona woodworthi Van D. 



Pale greenish yellow, the scutellar disc creamy, an indefinite 

 smoky band arising on posterior margin of pronotum and 

 extending to apex of elytra. A number of irregular black 

 dots on elytra, including a larger and fairly definite pair just 

 back of the center of the disc. A pair of round spots back of 

 ocelli on base of vertex and another pair just behind them are 

 usually faintly outlined in brown. As these spots increase 

 in size and numbers it shades off into var. piincticollis . 



This is the commonest form of this species throughout the 

 upper Mississippi Valley and extends east to' Ontario and the 

 New-England States. The writer has taken the brown nymphs 

 commonly from the water sprouts and lower limbs of basswood 

 trees in Iowa and Wisconsin. 



Woodworth described a specimen in which the smoky 

 shade had a slightly reddish tinge as bimaculata. 



Var. scarlatina Fitch. 

 Gypona modesla Spgb. 



Pale yellow with a smoky or reddish cast. A number of 

 irregular spots on the disc of the elytra. More or less of 

 scarlet spotting on whole dorsal surface. 



This variety is close to pectoralis. It is, however, readily 

 separated by the absence of the smoky band and the presence 

 of the scarlet spotting. 



