The North American Grasshoppers, Vol. 1., Acrididae: Gomphocerinal and Acridinae

Immersion Tolerance in Rangeland Grasshoppers (Orthoptera: Acrididae)

Insecticidal activity of photoactive dyes to American and migratory grasshoppers (Orthoptera: Acrididae).

Many photoactive dyes are relatively nontoxic to vertebrates despite their insecticidal properties. Several photoactive dyes known to be toxic to some groups of insects were evaluated at various concentrations for toxicity to American and migratory grasshoppers in laboratory and field studies. Rose bengal and phloxine B were effective at inducing mortality of grasshoppers when applied at 2 and ...

Rensch's rule is not verified in melanopline grasshoppers (Acrididae)

Sexual size dimorphism (SSD) is almost universal in animals. Rensch’s rule proposes that SSD increases with increasing average body size in taxa where males are larger than females (malebiased SSD; MBSSD) and decreases when females are larger (femalebiased SSD; FBSSD). Although it was proposed that both patterns are part of the same evolutionary trend, there is more evidence for Rensch’s rule i...

Host Selection by Grasshoppers (orthoptera: Acrididae) Inhabiting Semi-aquatic Environments

Through laboratory choice tests involving 19 plant species, we assessed the host selection behavior of six grasshopper species: Stenacris vitreipennis (Marschall) (glassywinged toothpick grasshopper), Leptysma marginicollis (Serville) (cattail toothpick grasshopper), Gymnoscirtetes pusillus Scudder (little wingless grasshopper), Paroxya clavuliger (Serville) (olivegreen swamp grasshopper), Paro...

NORTH AMERICAN ARCHAEOLOGIST, Vol. 9(2),1988 ADOPTION OF THE BOW IN PREHISTORIC NORTH AMERICA

Current ecologicalarchaeology,as often practiced, is too closed a system.The realization that introduced external factors may playa role in cultural changeas potently as localizedmechanismsdemands increasedattention to analytical boundaries and matters of scale.This article questions the utility and effectiveness of localizedadaptive explanations for large-scalehistorical processesand, as an il...