58 IOWA ACADEMY OF 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 foriH di^couipfa. His 

 two following species, tunicafa and sororia, probably also 

 belong here. 



^ Tettigonia bifida Say. Plate V., Fig. 1. 



^Tettiqoina Inliila S?\.\. Jour. Acad. Nat. Sc. , Phil. IV, p. Sis-lysi- 

 s' TeltKioiiin l^inlht Walk. Uomop. 111. p. ^^o. 1851. 

 " Ttiti'ionut i,i.ri,iii,. Walk. Homop. Ill, p. 780 1851. 

 Tettiyonia bijldti O. & B. la. Acad. Sc. IV, p. 175, i897- 



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. 



Verlex short, conical, half the length of the pronotum, nearly 

 twice wider than long, eyes small, narrower than pronotum at the 

 lateral angles. Eiytra broad, venation simple, no cross nervures 

 between tne sectors before apical cells, outer fork of lirst sector 

 figain 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 antenna? black, margined with light. 

 Face pitchy, outer margin of genaj and the suture between front 

 and genjB narrowly light, sides of front against ait^nnai 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 bind 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. 



