IOWA ACADEMY OF SCIENCES. 
59 
Genitalia; female segment about half longer than the preceding 
one, the posterior margin with the median half slightly rouudingly 
produced, whole segment very convex. Male plates scarcely as 
long as the ultimate segment, equilaterally triangular, their apices 
slightly divergently produced. Plates less than half the length of 
the pygofers. 
Specimens are at hand from New Hampshire, Vermont, 
New York, District of Columbia, Ohio, Iowa, Kansas, 
Florida, Tennessee, Alabama, Mississippi, Mexico and the 
West Indies. It occurs all over the eastern half of the 
United States from Canada to Florida, west to Iowa and 
Mississippi, and on into eastern Kansas and Nebraska; but 
a careful search in the west ends of these states and in 
Colorado has failed to find it. 
Tettigonia geometrica Sign. Plate V, Fig. 2. 
Tet.tigouia geome'rica Sign. An Soc. Ent. Fr. , p. 12, PI. 1, Fig. 12, 1854. 
Tettigonia geometrica Bak. Psyche VIII, p. 285, 1898. 
Resembling bifida in form and color, but smaller and 
lacking the blapk lines on the elytra. Length, 4.5 — 5 mm.; 
width, scarcely 1 mm. 
Vertex slightly shorter than in bifida , elytra narrower, vena- 
tion similar, the fork of the outer branch of the first sector occur- 
ring well behind the middle instead of at or before it, as in bifida , 
and its branches somewhat more divergent. 
Color; vertex black, with the two light crescentiform bands as in 
bifida , the anterior one narrower and almost broken on the frontal 
sutures; the two spots at the apex larger, approximate. Face black, 
the antennas and the margins of the ledge above light. Pronotum 
and scutellum as in bifida. Elytra bright green, the apical cells 
smoky, margined in front by three pale spots, the outer one 
the largest; the costal margin and usually the outer branch of 
the first sector light yellow. Some Florida males are much dark- 
ened up, but the light spots on the wings remain or become en’arged. 
Genitalia; as in bifida , but so much smaller that they are made 
out with difficulty. 
Specimens are at hand from the District of Columbia, 
Ohio, Kentucky, Florida, Arkansas and Mexico. Besides 
these, it has been reported from Illinois, Alabama and 
Louisiana. The Ohio River seems to be nearly its northern 
limit, as it has only been taken in southern Ohio and 
Illinois, and careful collecting in Iowa has not revealed it. 
It doubtless occurs throughout all the Southern States from 
