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Document Type

Peer-Review Article

Abstract

Excerpt: Many studies have been undertaken in the past on the food selection, food preferences, and economic damage of various grasshoppers and their allies. Among the more salient of these researches are those of Anderson (1961, 1964); Ball (1 936); Bindra (1958); Boldyrev (1928); Blackith and Blackith (1966); Brues (1946); Chapman (1957); Dibble (1940); Gangwere (1959, 1960, 1961, 1965, 1965a, 1966, 1966a, 1967);Husain etal. (1946); Isely (1938, 1946); Isely and Alexander (1949); Joyce (1952); Mulkern and Anderson (1959); Mulkern, Anderson, and Brusven (1962); Mulkern et al. (1969); Pfadt (1949); Riley (1878); Roonwal (1953); Savin (1927); Weiss (1924); and Williams (1954). Techniques useful in the investigation of food selection are to be found in certain of the above reports. Especially noteworthy in this respect are those by Blackith and Blackith, Chapman, Gangwere (1961), Isely and Alexander, Joyce, Mulkern and Anderson, Pfadt, Roonwal, and Savin.

The relatively new technique of Blackith and Blackith (1966) involves the comparison of colorations in the ileal diverticula of morabine grasshoppers (Orthoptera: Eumastacidae). The digestive caeca of eumastacids were previously discussed by Slifer (1944), and those of other groups by Gangwere (1966) in a comprehensive paper dealing with the mechanical handling of food in the orthopteroid alimentary canal. There is also an extensive literature on the gut physiology of these insects, some of which is appropriate to a consideration of the caeca and diverticula.

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