Overige edities - Alles bekijken
abdomen America antennæ appears base beds bill Birds collected border breeds brown cell characters close collected color common contain described Descriptions diameter distinct eggs entirely face fauna feet female fossils four genera genus gives Group head Hist Ibis Island joint known Lawrence length less Letter List List of Birds locality Lomita lower male margin marked middle narrow Nasua Natural nearly nest North Notes Notice numbers observed obtained occur Oiseaux Ornithology pale Panama portion posterior present probably Proc punctured Railroad referred region remains remarks River rounded Salvin says SCLATER seen segment shell short side slightly South Sparrow Passer domesticus species specimens spring strata surface tail taken third transverse types upper usually ventral Wheeler wings yellow young
Pagina 6 - ... during the latter part of June and the early part of July, but leaves the latter part of the summer poorly occupied.
Pagina 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.
Pagina 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.
Pagina 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:...
Pagina 771 - A DESCRIPTIVE CATALOGUE of the Raptorial Birds in the Norfolk and Norwich Museum.
Pagina 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...
Pagina 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.
Pagina 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....
Pagina 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...