156 INSECTS INJURIOUS TO VEGETATION. 



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

 species, 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 yel- 

 low 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, nan-owed 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 j7_ to above 

 -^Q inch ; exp. 1^^^ to l^^^ 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 reindeer moss which 

 not unfrequently grow in these situations. It is marked on 

 the wings somewhat like the barren-ground locust, but is inva- 

 riably smaller, with the thorax much more contracted before 

 the middle. It appears, in the perfect state, from the middle 

 of July to the middle of October. 



8. Locusta eiicerata. Long-horned locust. 

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

 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 



