REPORT OF THE SOCIETY 89 



THREE INJURIOUS ACRIDIANS OF NOVA SCOTIA 



C. B. Gooderham, Macdonald College 



Among the many species of Acrididae or Shorthorned Grasshoppers, 

 there are three forms which are very common in Nova Scotia. They are 

 usually found together, causing a considerable amount of damage to hay 

 and grain crops. To the casual observer these three forms look very much 

 alike, but upon close observation they will be found to differ considerably. 



In this paper I will attempt to describe each species briefly and to give 

 a short key for their separation. 



Key for Separation. 



A. With prosternal spine between front pair of legs. 



B. — Prosternal spine pointed, cerci short with length not more than 

 twice their width at middle. Subgenital plate of male with 

 a median notch. Hind femora usually crossed with dusky 

 transverse bands. Median carina on prozona seldom distinct. 

 — M. atlanis. 



BB. — Prosternal spine bulbous or rounded. Subgenital plate of 

 male without median notch. Distal half of cerci less than 

 half as broad as at base. Hind tibia red, hind femora with- 

 out dusky cross bars, median carina frequently distinct on 

 prozona. — M. femur-rubrum. 



AA. — Without prosternal spine. Disk of pronotum fiat, median carina 

 low, equal throughout, faintly cut by principal sulcus. Hind femora crossed 

 by three more or less distinct black bars. — Camnida pelliicida. 



The Lesser Migratory Locust 



{Melanoplus atlanis Riley) 



Size medium. Vertex somewhat elevated above the pronotum, front 

 half strongly sloping. Pronotum rather short expanding at metazona, 

 front margin quadrate, hind margin obtuse angled, disk slightly convex, 

 median carina only distinct on metazona. Tegmina fully developed and 

 surpassing the hind femora, both in male and female, usually spotted with 



