American Grasshopper, Schistocerca americana (Drury) (Orthoptera: Acrididae)

1980 ◽  
Vol 86 (1) ◽  
pp. 87-97
Author(s):  
PETER SIMMONS

Both of the descending contralateral movement detector (DCMD) neurones of Schistocerca americana gregaria, which respond to stimulation of the contralateral eye or to loud noises, mediate excitatory postsynaptic potentials in most ipsilateral flight motoneurones.


2000 ◽  
Vol 203 (18) ◽  
pp. 2713-2722 ◽  
Author(s):  
R.K. Josephson ◽  
J.G. Malamud ◽  
D.R. Stokes

The asynchronous muscles of insects are characterized by asynchrony between muscle electrical and mechanical activity, a fibrillar organization with poorly developed sarcoplasmic reticulum, a slow time course of isometric contraction, low isometric force, high passive stiffness and delayed stretch activation and shortening deactivation. These properties are illustrated by comparing an asynchronous muscle, the basalar flight muscle of the beetle Cotinus mutabilis, with synchronous wing muscles from the locust, Schistocerca americana. Because of delayed stretch activation and shortening deactivation, a tetanically stimulated beetle muscle can do work when subjected to repetitive lengthening and shortening. The synchronous locust muscle, subjected to similar stimulation and length change, absorbs rather than produces work.


1899 ◽  
Vol 31 (2) ◽  
pp. 29-36 ◽  
Author(s):  
E. M. Walker

20. Schistocerca americana, Drury.Gryllus americanus, Drury, Illustr. Nat. Hist., app. (1773).Acridium americanum, Scudd. Mat. Mon. N. A. Orth., 466 (1862).Schistocerca americana, Blatchley. Can. Ent., XXIII., 79 (1891).This large and beautiful locust has been twice reported from Ontario, at London, (Can. Ent., XXVII., p. 52), and at Toronto(Can. Ent., XXIX., p. 89), a single example being taken in each instance. These were probably wanderers from the South, certainly in the case of the Toronto specimen, and the insect can hardly be regarded as a native of our Province, though it may be established in the extreme southern portion.


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