50 IOWA ACADEMY OF SCIENCES. 



species very readily fall into two groups, the first of which 

 under "A" is the more typical and would include most of 

 the tropical species. The second group, "AA," has a reduc- 

 tion in the number of cross-nervures, narrower heads, and 

 the face pushed downwards and forwards, instead of 

 rounding back at the apex, giving the head a much 

 greater depth. This is extremely emphasized m^fripunc- 

 t((f((, and if it occurred here alone there might be reason 

 for generic separation, but a most complete gradation in 

 this character -is found running back from this si^ecies 

 through bifida, hartii, occaforia and gofhicd to the other 

 extreme \\?h icrofjli/p/i tea. 



O KEY TO THE SPECIES.* 

 A. Elytra with three anteapical cells; head as wide as the pro- 

 uotum, not as deep as the length of vertex and pronotum 

 together. Face, in profile, strongly curved backwards, usually 

 with the clypeus somewhat angled. 



B. Head with a pattern sometimes obscure, but not in the 

 form of definite spots. 

 C. Head pattein very complex, no parallel lateral 



bars. Length, over 6 mm hieroglyphica Say. ^ 



CC. Head pattern simple, the lateral bars running 

 back parallel with the median pair. Length, 



6 mm. or less gothica SignS^ 



BB. Head with definite spots, not coalescing into a pattern. 

 C. Greenish blue, face with two stripes, posterior 



half of pronotum with black spots 



alropunctata Sign.^ 



CC. Reddish, face with three stripes, posterior half of 



pronotum with four longitudinal stripes 



dohrni Sign . O 



AA. Elytra with no cross-nervures between the branches of the 

 first sector before the apical cell (occasional in occaforia). Q 

 Head narrower than pronotum, deeper than the length of 

 vertex and pronotum. Face, in profile, straight or in a single 

 curve, rather long. 



^ *^OT:^:-Tettigonia lineata Sign. (= coerideovittata Sign.) although cred- 

 ited to the "United States"' in the original description, has not been 

 included in this synopsis as no specimens "have been seen from points 

 nearer than central Mexico, and it seems probable that the original refer- 

 ence was an error. 



^ Teitigonia aeshians Walk, is credited to California by Van Duzee, in his 

 catalog, on what authority I do not know. Walker gave "West Coast of 

 America" and Signoret "Para" as habitat for this species. It belongs to a 

 group of distinctly tropical forms, and is doubtless South American in dis- 

 tribution. 



