THE CANADIAN ENTOMOLOGIST 277 



and are produced in the same manner by sawing both thighs 

 simultaneously upon the edges of the tegmina. 



Orphidella pratorum Scudder. In dry fields and pastures in 

 upland situations, Thompson's Mills. I have recognized no 

 stridulation for this grasshopper. 



Chortophaga viridifasciata De Geer. This dimorphic species 

 is exceedingly common at Thompson's Mills, and is the earliest 

 to appear in March. It is generally distributed, being found 

 in alfalfa fields, dry pastures, etc. The brown form, infuscata, is 

 equally abundant. The notes of this insect are a noisy crackling 

 produced during flight. 



Hippiscus rugosiis Scudder. Very common in dry pastures 

 and old fields at Thompson's Mills. A most clumsy, inactive 

 locust and readily captured. It seems to have no distinct stridula- 

 tion. 



Dissosteira Carolina L. This widely distributed grasshopper 

 is a very common one at Thompson's Mills. It shows every- 

 where a preference for the bare soil of roadsides and fields. 

 In such situations its dull gray and brown mottlings make it 

 almost appear a part of the naked soils upon which it alights. The 

 notes of this grasshopper are most peculiar. It ascends a few feet 

 above the ground and, hovering in mid-air for some seconds, 

 flutters its wings and produces a continuous lisping note. This 

 mid-air performance is quite distinct from the usual flights of this 

 insect, which are nearly or quite noiseless. 



Trimerotropis citrina Scudder. This insect is a common 

 one at Thompson's Mills, perferring the bare soil of roadsides and 

 cultivated fields as does Dissosteira Carolina. I have recognized 

 no note. 



Schistocerca americana Drury. This is a common grasshopper 

 at Thompson's Mills, occurring almost entirely in dry situations 

 in the vegetation of fields and in weeds and cotton plants. It is a 

 shy species, and possesses vigorous powers of flight. Except for a 

 rustling of the ample, transparent wings during flight, it has no 

 definite stridulation. 



Schistocerca ahitacea Harris is less common than the preceding. 

 It prefers the tall weeds and grasses of old fields. Its flight, like 



