ORTHOPTERA. 145 



It is possible that this may be a variety of the preceding spe- 

 cies, from which it differs especially in the form and width of the 

 wings and in the colors of the hindmost shanks. It is found in 

 the same places, and at the same time as the barren-ground locust. 



7. Locusta marmorata. Marbled locust. 



Ash-colored, variegated with pale yellow and black ; thorax 

 suddenly narrowed before the middle, and the slightly elevated 

 longitudinal line on the top is cut through in the middle by a 

 transverse fissure ; wing-covers marbled with large whitish and 

 black spots, and semitransparent at the end ; wings light yellow 

 on the half next to the body, transparent near the end, with two 

 black spots on the tip, and a broad intermediate black band, 

 which, narrowed and curving inwards on the hind margin, nearly 

 reaches the inner angle ; hindmost thighs pale yellow, black at 

 the extremity, and nearly surrounded by two broad black bands ; 

 hind shanks coral-red, with a black ring immediately below the 

 knee, and followed by a white ring, black at the lower extremity 

 also, with the tips of the spines black. In some individuals there 

 is an additional black ring below the white one on the shanks. 

 Length from r \ to above r % inch ; exp. l T % to 1 T 8 „ inch. 



The marbled locust, which is one of our prettiest species, is 

 found in the open places contiguous to or within pitch-pine woods, 

 flying over the scanty grass and rein-deer moss which not unfre- 

 quently grow in these situations. It is marked on the wings 

 somewhat like the barren-ground locust, but is invariably smaller, 

 with the thorax much more contracted before the middle. It 

 appears, in the perfect state, from the middle of July to the mid- 

 dle of October. 



8. Locusta eucerata. Long-horned locust. 



Ash-colored, variegated with gray and dark brown ; antennae 

 nearly as long as the body, and with flattened joints ; thorax very 

 much pinched or compressed laterally before the middle, with a 

 slightly elevated longitudinal line, which is interrupted by two 

 notches ; wing-covers and wings long and narrow ; the former 

 variegated with dusky spots, and semitransparent at tip ; wings 

 next to the body yellow, sometimes pale, sometimes deep and 



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