THE GREEN-STRIPED LOCUST: ITS DESCRIPTION. igt 



their torpor, and summoned them to activity and to the food awaiting 

 them in the already green fields. But at the time above stated for the 

 premature awakening and coming forth of 0. viridifasciata, we find 

 from the records that unusually warm weather was prevailing. From an 

 average temperature for the several preceding weeks of 27° Fahr., it 

 suddenly changed to a mean temperature (of one week) of 40°, reach- 

 ing at the highest 56°. The records of the U. S. A. Signal Service, at 

 Albany, show the following temperatures for the months of January and 

 Februarv, of 1882: 



The month of February is recorded as " much the warmest February 

 since the establishment of the Signal Station " at Albany, in 1873, the 

 mean temperature of the i6th having been 50°. The December pre- 

 ceding had also been the warmest during the same period, having had 

 a mean temperature of 39^, as against an average of 27" for the seven 

 previous years. 



Description of the Insect. 



Dr. Harris gives the following description of the species: Green; 

 thorax keeled above; wing-covers with abroad green stripe on the outer 

 margin extending from the base beyond the middle and including two 

 small dusky spots on the edge, the remainder dusky but semi-transpar- 

 ent at the end; wings transparent, very pale greenish yellow next to the 

 body, with a large dusky cloud near the middle of the hind margin, 

 and a black line on the front margin; antennse, fore and middle legs 

 reddish; hind thighs green, with two black spots in the furrow beneath; 

 hind shanks blue-gray, vi^ith a broad whitish ring below the knees, and 

 the spines whitish, tipped with black. Length about one inch; expanse 

 from more than one inch and three-fourths to nearly two inches. 



Dimorphic Forms. 



The species, according to Mr. Scudder, is quite variable, but presents 

 an interesting case of dimorphism, in that it appears under two distinct 



