Bulletin of the United States Geological and Geographical Survey of the Territories, Volumen 5U.S. Government Printing Office, 1879 |
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Página 11
... develop early in the season . It is true that we may frequently find the galls quite fresh , and containing larvæ , pupæ , and winged insects as late as the first week in July , and these late No. 1. ] 11 RILEY AND MONELL ON APHIDIDE .
... develop early in the season . It is true that we may frequently find the galls quite fresh , and containing larvæ , pupæ , and winged insects as late as the first week in July , and these late No. 1. ] 11 RILEY AND MONELL ON APHIDIDE .
Página 13
... containing a single female , destined to become winged , when it escapes from beneath , the winged insect occupying the entire cavity of the gall . ] BIOLOGICAL . A very interesting gall , which may be called the Bead - like Cotton ...
... containing a single female , destined to become winged , when it escapes from beneath , the winged insect occupying the entire cavity of the gall . ] BIOLOGICAL . A very interesting gall , which may be called the Bead - like Cotton ...
Página 24
... containing these two species were interchanged , or else that the two species were mixed to- gether ; though it is not impossible that the species may occur on both grass and willow . I should have thought that the error was made by ...
... containing these two species were interchanged , or else that the two species were mixed to- gether ; though it is not impossible that the species may occur on both grass and willow . I should have thought that the error was made by ...
Página 34
... contain the typical reptilian genera Plesiosaurus , Ich- thyosaurus , Pliosaurus , and Dimorphodon , or the fishes of the Dapediida . This formation , so important in Europe , is almost omitted from the North American series . A few ...
... contain the typical reptilian genera Plesiosaurus , Ich- thyosaurus , Pliosaurus , and Dimorphodon , or the fishes of the Dapediida . This formation , so important in Europe , is almost omitted from the North American series . A few ...
Página 39
... contain them . We are accustomed , at present , to rely for our definitions upon all the faunal pe- culiarities upon which we can seize : the period of appearance of certain types ; the duration of certain types ; and the disappearance ...
... contain them . We are accustomed , at present , to rely for our definitions upon all the faunal pe- culiarities upon which we can seize : the period of appearance of certain types ; the duration of certain types ; and the disappearance ...
Índice
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55 | |
71 | |
119 | |
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209 | |
223 | |
227 | |
239 | |
331 | |
341 | |
349 | |
371 | |
143 | |
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Otras ediciones - Ver todo
Términos y frases comunes
abdomen alike in color America American Birds antennæ apex apical April basal base beds Birds collected blackish Brasilien breeds Bull Carboniferous Catalogue cell characters clypeus Coati Colo Costa Coues coxæ Cress Cretaceous Descriptions diameter dorsal eggs Elytra English Sparrow Passer fauna feet female fossils genera genus gray Hist Ibis incisor joint LAFRESNAYE Laramie Lawrence length Letter List of Birds lobes Lomita male mandibles margin median Meekoceras metathorax Mexico middle Miocene molars narica Nasua nearly nervure nest Notes numbers observed Ornithology pale posterior premolar Proc prothorax pubescence punctured region River Sclater and Salvin seen shell side Sparrows Passer domesticus Species of Birds specimens spot Stizus Straits of Magellan strata synonymy tail tarsi thorax tibiæ transverse Ueber Union Pacific Railroad upper ventral segment Viverra Vögel Wheeler wings yellow Zool
Pasajes populares
Página 6 - ... during the latter part of June and the early part of July, but leaves the latter part of the summer poorly occupied.
Página 242 - Relation abrégée d'un voyage fait dans l'intérieur de l'Amérique Méridionale, depuis la côte de la Mer du Sud, jusqu'aux côtes du Brésil et de la Guyane, en descendant la rivière des Amazones.
Página 199 - The frequency of these monoclinal detached blocks gives abundant warrant for the assertions of Powell and Gilbert that the region is one prominently characterized by vertical action; yet when we come to examine with greater detail the structure of the individual mountain ranges it is seen that this vertical dislocation took place after the whole area was compressed into a great region of anticlinals with intermediate synclinals.
Página 2 - Continuing his observations, especially during the present summer, he has been able to trace the life-history of those species producing galls on our own elms, and to show that they all agree in this respect, and that the impregnated egg produced by the female is consigned to the sheltered portions of the trunk of the tree, and there hibernates — the issue from it being the stem-mother which founds the gall-inhabiting colony the ensuing spring.
Página 7 - ... together, which are subequal; the terminal joint usually the shortest, the apical sub-joint being normal, and in some cases sufficiently constricted to resemble an additional joint; joints 3, 4, and 5 rather distinctly annulated the constrictions being generally quite deep, and producing a moniliform aspect, there being on an average 22 such on joint 3. Tarsi with the basal joint distinctly separated into a lobe, the claws strong, and in length twice the diameter of the tarsus. Wings hyaline:...
Página 771 - A DESCRIPTIVE CATALOGUE of the Raptorial Birds in the Norfolk and Norwich Museum.
Página 10 - Vi of an inch high, compressed and its sides wrinkled perpendicularly and its summit irregularly gashed and toothed ; of a paler green color than the "*The bibliography of this species very well illustrates the confusion that too often surrounds the proper determination, not only of insects of this family, but of all orders. It is due to three causes, not easily removed...
Página 11 - ... sexual individuals, the females of which so often perish while yet covering their solitary winter eggs. I have not been able to prove absolutely that there are two broods of the gall-making female, and my observations all tend to the conclusion that no galls are formed except by the stem-mother that hatches from the impregnated egg.
Página 5 - ... around her, and in their turn commence to bring forth young, some remaining within the original curl, others scattering to found new colonies. Their issue, or the third generation, show certain marked structural differences from the first (see description), and are destined to become winged. During most of the month of May, we may find, where large clusters of leaves are affected, the few more or less exhausted stem-mothers, and these second and third generations in every stage of development....
Página 126 - ... but to turn our attention to the cliffs on the right hand to discover a multitude of the bleached trunks of the ancient forests. In the steeper middle portion of the mountain face, rows of upright trunks stand out on the ledges like the columns of a ruined temple. On the more gentle slopes farther down, but where it is still too steep to support vegetation, save a few pines, the petrified trunks fairly cover the surface, and were at first supposed by us to be the shattered remains of a recent...