228 RKJ'OKT OF STATE GEOLOGIST. 



Color usually a uniform yellowish gray; sometimes a russet red or 

 dull black, the tibiae annulate with light and dark. Body rather 

 long, depressed, smoothly and evenly granulate. Vertex viewed from 

 above, but little wider than one of the large and prominent eyes; 

 not advanced in front of them, its front margin slightly hollowed. 

 Pronotum truncate in front, advanced upon the head to the eyes 

 (whence the specific name), the medina carina wanting or indistinct 

 on the front portion; low on the elongated posterior portion, which 

 extends about 3 mm. beyond the apex of hind femora. 

 Inner wings exceeding the pronotum by 2 mm. 



Measurements: Length of body, male, 9 mm., fe- 

 male, 12 mm.; of pronotum, male, 10.5 mm., female, 13 

 mm.; of hind femora, male, 5.5 mm., female, 7 mm. 



The "hooded grouse locust" doubtless occurs through- 

 out the State, having been noted in Spencer, Knox, 

 Monroe, Vigo, Putnam, Marion and Marshall counties. 

 It is most always found along the damp sandy or muddy 

 l)anks of ponds, lakes and streams, usually in company 

 with Galf/ulus oculalus and other semi-aquatic insects. 

 tettixeucuiia- Its uiodest liucs agree admirably with such surround- 

 tii8 (Bnim.). ings, thus furnishing the insect valuable protection 

 against its foes. When disturbed it more often flies 

 ihiin leaps, its flight being more prolonged than any other of our In- 

 diana Tettigians. It often alights upon the water, where it swims 

 with ease, its dilated hind tibia) being then of much aid to its onward 

 progress. , 



XVI. Tettigidea Seudder (1862). 



The grouse locusts belonging to this genus are more robust and 

 clumsy in form than those we have previously treated, and possess a 

 larger head and less oblique face. They may also be readily distin- 

 guished by their 22-jointed antenna} and by the fore femora being 

 sulcate or grooved along their upper margin. The crown of the head 

 has a small lobe on each side which encroaches upon the upper inner 

 border of the eye. The vertex is wider than one of the eyes and has 

 its front 15order more or less rounded. Pronotum with its dorsal sur- 

 face finely granulate and usually more or less rugose or wrinkled; its 

 sides sloping downward between the shoulders, the posterior portion 

 flat and either long drawn out or abbreviate; the anterior margin 

 rounded, angulate or acute and more or less projected forward upon 

 the head; the median carina distinct. As in the previous genera, the 

 males are much more slender than the females and both the prono- 



