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 in tripunc- 
tata , 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 species 
through bifida , hartii, occatoria and gothica to the other 
extreme in hieroglyph ica. 
KEY TO THE SPECIES.* 
A. Elytra with three anteapical cells; head as wide as the pro- 
notum, 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 pattern very complex, no parallel lateral 
bars. Length, over 6 mm hieroglyphic a Say. 
CC. Head pattern simple, the lateral bars running 
back parallel with the median pair. Length, 
6 mm. or less gothica Sign. 
BB. Head with definite spots, not coalescing into a pattern. 
C. Greenish blue, face with two stripes, posterior 
half of pronotum with black spots 
atropunctata Sign. 
CC. Reddish, face with three stripes, posterior half of 
pronotum with four longitudinal stripes 
dohrni Sign. 
AA. Elytra with no cross-nervures between the branches of the 
first sector before the apical cell (occasional in occatoria). 
Head narrower than pronotum, deeper than the length of 
vertex and pronotum. Face, in profile, straight or in a single 
curve, rather long. 
*NoTW.—Tettigonia lineata Sign. (= coeriileovittata 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. 
Tettigonia aestuans 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. 
