FAMILY v.— GROUSE LOCUSTS. 



101 



found near St. Anthony Park. The insect, illustrated in Fig. 

 62, must be uncommon, or very local, as no others have been 

 discovered; the line gives its natural length. 



GENUS Tettix Charpentier (1841). 



Size small; form slender; head small, eyes globular, pro- 

 truding; pronotum compressed anteriorly, median carina 

 distinct, hind portion extending back over the abdomen to 

 or beyond its extremity, and terminating in a long narrow 

 point; wing-covers very short; wings fan-like, well develop- 

 ed, almost as broad as long, and as long or longer than the 

 abdomen ; lower anterior angle of sides of pronotum angu- 

 lated and bent inward. 



Tettix granulatus Kirby. 



Anterior border of vertex considerably advanced in front 

 of eyes, angulate, the apex very slightly rounded, or rarely 

 with the mid-carina projecting a trifle. In profile the face is 

 quite retreating, the vertex considerably advanced, sinuate 

 opposite the eyes, and moderately protuberant opposite 

 antennae. The eyes are the least prominent in this of any 

 species, and the body more slender. It is liable to be mis- 

 taken for T. ornatus only, but the outlines of the profile and 

 vertex, considered together, need leave no doubt of the 

 species. 



Measurements. — Length of bod}', female, 15 mm., male, 

 12 mm.; pronotum, 13 mm.; hind femora, 6 mm. 



Fig. 63. — Tettix granulatus and two varieties. Original. 



