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IOWA ACADEMY OE SCIENCES 
different in color and both strikingly different from the 
form from the United States. One of these forms has the 
stripes black, the disc of the pronotum and elytra blue- 
green, with very faint stripes; often a bright blue band 
inside the claval suture. The other variety has the stripes 
very broad and definite, of a blue-black; the spaces be- 
tween the stripes yellow on vertex, becoming greenish on 
the pronotum and bright green on the elytra. Through- 
out this variation the structure and pattern remains the 
same, except that the transverse light band at the apex 
of the elytra is often much broader or doubled by a nar- 
row, black line. Fowler figured this latter variety as 
occatoria , and described our common form as compta. His 
two following species, tunicata and sororia , probably also 
belong here. 
Tettigonia bifida Say. Plate V., Fig. 1. 
Tettigonia bifida Say. Jour. Acad. Nat. Sc., Phil. IV, p. 313,1831. 
Tettigonia tenella Walk. Homop. Ill, p. 770, 1851. 
Te/tigonut fasciata Walk. Homop. Ill, p. 780 1851. 
Tettigonia bifida O. & B. Ia. Acad. Sc. IV, p. 175, 1897. 
Head short and blunt. Color green, alternate circular 
bands of light and black on head and pronotum, nervures 
broadly black. Length, 5.5—6 mm.; width, 1.2 mm. 
Vertex short, conical, half the length of the pronotum, nearly 
twice wider than long, eyes small, narrower than pronotum at the 
lateral angles. Elytra broad, venation simple, no cross nervures 
between ttie sectors before apical cells, outer fork of first sector 
pgain forking near its middle. Face, as seen from side, very gently 
curved. 
Color; vertex black, the concave posterior margin with a light 
band which extends behind the eyes, another light band parallel 
with this across the disc, just in front of the ocelli, a spot on either 
side of the apex, sometimes connected with the anterior band by 
divergent lines. Ledge above antennae black, margined with light. 
Face pitchy, outer margin of genae and the suture between front 
and genae narrowly light, sides of front against ai tinnae rufous. 
Pronotum with a broad black band on the anterior margin, broad- 
est in the middle, bordered behind by a narrow light band, the 
humeral and posterior margins with a narrow band of ivory white, 
in front of which there is a broader band of black, sometimes this 
band margined in front by another pale one, the disc green. Scu- 
tellum yellow, with the transverse impression black. Elytra green, 
the nervures black, except for the apical cells, which are entirely 
smoky. Legs, yellow. 
