26 N. S. ENTOMOLOGICAL SOCIETY. 



SUB-FAMILY OEDIPODINAE. 



Like the Tryxalinae the members of this sub-family have no prosternal spine. The 

 face is much less oblique than in the previous sub-family, being nearly vertical. The 

 tegmina are fully developed and the wings are sometimes colored. 



To this sub-family belong our largest grasshoppers, also our most injurious and 

 common form, C. pellucida. 



Key to Genera. 



A. Disk of pronotum rather flat. Median carina low, equal throughout, faintly 

 cut by principal sulcus. Hind femora crossed by three more or less distinct 

 black bars Camnula. 



B. Median carina raised in the form of a crest and cut by only one sulcus. Disk 

 of hind wing black with white or yellowish border Dissosteira. 



BB. Median carina cut by two sulci, the anterior one less distinct than posterior 

 one. Disk of hind wing yellow with black border. Outer half of wing black . . 



Circotetlix. 



D. Carolina (Linn.) 



This is our largest species and known as the "Carolina Locust." Its general color 

 is light brown, but there is great variation in both sex and locality, varying from very 

 light brown to almost coal black. The males are darker colored in every case. The 

 wings are deep black except the outer border which is white or yellowish, and when in 

 flight the contrasting colors and broad expanse of wings make it a conspicuous object, 

 but when it is on the ground it is almost impossible to detect, so perfectly does its color 

 blend with its surroundings. The male when in flight usually makes a sharp crackling 

 sound. 



This insect is common along dusty roads, sand bars, or almost any high dry place. 



C. pellucida Sc udder 



This species is known as the "clear-winged locust." The color is variable but usually 

 a light brown. There is a triangular black spot behind each eye, and an oblong black 

 spot on the lateral lobes of the prozona. The tegmina are brown with several large 

 dark spots scattered over them. The dorsal surface is brown and has a yellow stripe 

 running down each humeral angle. Inner wings transparent. Hind femora crossed by 

 two or three oblique black bands. Size medium. 



This locust is very common all over the province, occurring wherever M. femur- 

 rubrum or M. afanis are found. It is also our most injurious form. It is a very strong 

 flier, making no noise during flight, and is our earliest maturing grasshopper. 



C. verruculatus (KIrby). 



Thh insect is very common in the province, being found in almost any dry place, 

 especially in dusty fields or on burnt land. While it often resembles D. Carolina in ap- 

 pearance and habits, it can easily be separated from it by the color of its wings and by 

 having two notches instead of one in the median carina. The color varies from brown 

 to black. Tegmina mottled, hind wings with white or yellowish disk, and the border 

 and distal half black. Hind femora crossed by three or four darker oblique bands on 

 outer face. H'nd tibia light with dark band at apex and another on basal third. Size 

 large. 



