The North American Ants Described by Asa Fitch

North American Seed-harvester Ants

■ Abstract Seed-harvester ants are a dominant and conspicuous insect group throughout arid portions of the southwestern United States and northern Mexico, and they include ∼75 species. Intense study in the late 1970s and early 1980s led to the paradigm that interspecific competition for limited seed resources is the primary factor that structures seed-harvester ant communities. This review atte...

New North American Chrysauginae (Pyralidae) described by E.D. Cashatt

A Ph.D. dissertation completed by E.D. Cashatt in 1968 entitled "Revision of the Chrysauginae of North America" does not meet the criteria of publication so the new taxa described therein are not available per the International Code of Zoological Nomenclature. In order to validate the taxa proposed in that document we formally describe and illustrate the following: Arta brevivalvalis Cashatt, s...

the american dream in three plays by eugene oneill, tennessee williams, and lorraine hansberry

این مطالعه به نقد و بررسی مفهوم اسطوره ی رویای امریکایی در سه نمایشنامه ی قرن بیستم امریکایی می پردازد، که این نمایشنامه ها عبارتند از: the iceman cometh (مرد یخین می آید) نوشته ی یوجین اونیل، 1940؛ desirea streetcar named (اتوبوسی به نام هوس) نوشته ی تنسی ویلیامز، 1947؛ و in the sun raisin a (انگور خشکیده در آفتاب) ، نوشته ی لورین هنزبری، 1958. هدف از این بررسی، ابتدا شناخت مفهوم رویای امری...

North American velvet ants form one of the world’s largest known Müllerian mimicry complexes

Color mimicry is often celebrated as one of the most straightforward examples of evolution by natural selection, as striking morphological similarity between species evolves in response to a shared predation pressure. Recently, a large North American mimetic complex was described that included 65 species of Dasymutilla velvet ants (Hymenoptera: Mutillidae). Beyond those 65 species, little is kn...

The ( North ) American English