ORTHOPTERA. 151 



2. Tetrix dorsalis. Red-spotted grouse-locust. 



Rusty black, with ochre-yellow spots on the sides and legs, and 

 a large rust-red spot on the top of the thorax ; wings extending 

 beyond the apex of the thorax. Length \ inch. 



3. Tetrix quadrimaculata. Four-spotted grouse-locust. 



Ash-colored or dark gray above, variegated with black ; four 

 velvet-black spots on the top of the thorax ; wings projecting 

 beyond the extremity of the thorax. Length from r % to T \ of 

 an inch. 



This is a shorter and thicker species than the ornamented 

 grouse-locust. It is not uncommon in pastures from the first o( 

 May to the first of June. 



4. Tetrix bilineata. Two-lined grouse-locust. 



Ash-colored ; thorax paler, with a narrow angular whitish line, 

 on each side, extending from the head beyond the middle ; the 

 angular portion including a long blackish patch on each side ; 

 wings, in the male, rather shorter than the thorax, in the female 

 longer. Length from ^\ to more than ^% inch. 



5. Tetrix sordida. Sordid grouse-locust. 



Yellowish ash-colored ; thorax with minute elevated black 

 points ; wings, in both sexes, rather longer than the thorax. 

 Length from / T inch to nearly | inch. 



I have taken this species both in May and September, and have 

 received a specimen from Dr. D. S. C. H. Smith, of Sutton, 

 Massachusetts. 



II. Jlntennce 22-jointed ; eyes hardly prominent, top of the head 

 not horizontal between them, but curving toicards the front, with a 

 very slightly projecting ridge ; wings smaller than in those of the 

 preceding group. 



6. Tetrix lateralis. Black-sided grouse-locust. 



Pale brown ; sides of the body blackish ; thorax yellowish 

 clay-colored, shorter than the wings, but longer than the body ; 

 wing-covers with a small white spot at the tips ; male with the 



