Download or read book The Genus Phlepsius in North America Homoptra written by Herbert Osborn and published by . This book was released on 1923 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Genus Xestocephalus in North America Homoptera Cicadellidae written by Harold Truman Peters and published by . This book was released on 1932 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Revision of Some Phlepsiuslike Genera of the Tribe Deltocephalini Homoptera Cicadellidae in America North of Mexico written by Harold W.. Crowder and published by . This book was released on 1952 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Genus Melanaspis in North America Homoptera Diaspididae written by Lewis L. Deitz and published by . This book was released on 1968 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Catalogue of the Homoptera written by United States. Agricultural Research Service and published by . This book was released on 1964 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Classification of the Genus Xestocephalus Homoptera Cicadellidae for North and Central America Incuding the West Indies written by Paul W. Cwickla and published by . This book was released on 1985 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Taxonomy and Distribution of the Leaf hopper Genus Aphrodes Curtis Homoptera Cicadellidae in North America written by Terry Allen Klein and published by . This book was released on 1975 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subfamily Aphrodinae is represented in the Nearctic Region by eight species contained in a single tribe, Aphrodini, and genus Aphrodes. The external and internal morphology, biology and ecology of the Nearctic members of the genus Aphrodes were investigated. Distributional evidence indicates that six of the eight species, belonging to the subgenera Aphrodes and Anoscopus, have been introduced from the Palearctic Region, presumably via maritime shipping. These six species occur either within the West Coast and adjacent land area or the East Coast and Great Lakes region and adjacent land areas, or both. The other two species, belonging to the subgenus Stroggylocephalus, are believed to be indigenous to North America and are not known to occur elsewhere. These two species have been recorded from numerous North American localities between 35°N and 58°N latitude. The irregular distribution of Nearctic members of the subgenus Stroggylocephalus indicates that these species now exist as relict populations. Two species of the subgenus Stroggylocephalus are recorded from Europe with one, agrestis, reported as occurring in North America. However, records of agrestis in North America were not verified, and prior records are believed to be erroneous. A single female of the subgenus Stroggylocephalus from Kentucky apparently represents a new species, the third known from North America. The Nearctic species of Aphrodes are here assigned to three subgenera: Aphrodes s. s., Anoscopus and Stroggylocephalus. Species differentiation is based primarily on features of the male genitalia. The structure, length, and number of retrorse spines of the aedeagus is unique for each species. The structure of the pygofer hook and style, the shape and setation of the genital plate and the absence or presence of a secondary papilliform structure adjacent to the pygofer hook were found to be useful in discriminating between some species and species groups. Morphological differentiation of females of some species is nearly impossible. The number of dentations on valve II of the ovipositor was found to be unreliable for discriminating species or species groups, in contrast to Readio's findings (1922). Color and color pattern of the forewing, face and crown in males and some females were frequently found to be useful for recognition of some species and species groups even though considerable amounts of variation occur within a species. Wing venation is variable; the venation of the two forewings of the same insect are often different. However, the length of the forewing was found to be a reliable character for distinguishing members of Aphrodes s. s. and Stroggylocephalus from Anoscopus. Crown L:W ratios of the females are usually smaller than the males and ratios of both sexes are unreliable for species differentiation because of the amount of infras pecific variation. Evidence regarding anatomy of the reproductive organs of species of Aphrodes, studied for the purpose of comparison with representatives of other genera and subfamilies of leafhoppers, although limited in scope, provides information useful for species differentiation in sexually mature males. The structure of the reproductive tracts supports the conclusion that the species studied belong to a single genus Aphrodes, or at most to two genera, Aphrodes and Stroggylocephalus. The Nearctic species of the genus Aphrodes are characterized through illustrations, verbal descriptions and a diagnostic key. Infraspecific variation consists primarily of differences in color, color pattern and size. The male genitalia are relatively uniform with some minor differences occurring in the length and rugosity of the styles, rugosity and crenulations on the lateral margin and apex of the pygofer hooks, and length and position of the retrorse spines of the aedeagus. The nymphal instars of three species--A. bicinctus, albifrons and serratulae--are described. The color and color pattern were found to be distinct for each of these species from the second ins tar to the final molt. Field and laboratory studies demonstrate that at least some of the species of Aphrodes are polyphagous. Two species, serratulae and albifrons, appear to prefer grasses, but will also feed on clovers. Those Nearctic species of Aphrodes that have been studied with reference to habitat preference are found in such places as near the base of plants, in soil surface litter, and under or around rocks and boards. Members of Aphrodes s. s. and Anoscopus are univoltine, with a few females surviving the winter. Adults of Stroggylocephalus have been recorded during nearly every month which suggests a polyvoltine life cycle.

Download or read book The Nearctic Leafhoppers Homoptera Cicadellidae a Generic Classification and Check List written by Paul Oman and published by . This book was released on 1949 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Bulletin written by Mervin William Nielson and published by . This book was released on 1968 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Mosquitoes of Illinois Diptera Culicidae written by Herbert Holdsworth Ross and published by . This book was released on 1947 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalogue of Scientific Papers 1800 1900 ser 4 1884 1900 written by Royal Society (Great Britain) and published by . This book was released on 1914 with total page 1066 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transactions of the American Entomological Society written by American Entomological Society and published by . This book was released on 1894 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of the Cicadelloidea written by Zeno Payne Metcalf and published by . This book was released on 1964 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Collected Papers from the Department of Zoology and Entomology written by Ohio State University. Department of Zoology and Entomology and published by . This book was released on 1949 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Record of Zoological Literature written by and published by . This book was released on 1893 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Zoological Record written by and published by . This book was released on 1893 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Demand and Price Analysis for Potatoes written by Olman Hee and published by . This book was released on 1967 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt: