The Trout-food insects of Tasmania: Part II--A monograph of the mayflies of Tasmania

The paper forms Part II. of the' Trout-food Insects of Tasmania,' and is intended to be read with Part I., in which Atalophlebia australis (Walker), the long-lost genotype of the genus Atalophlebia, was fully discussed and described. Part II. is a Monograph of the Mayflies of Tasmania, as far as at present known

The biological control of noxious weeds

R.M. Johnston was honoured in a lecture read by R.J Tilyard in which it was claimed that the most striking achievement of that time was the immense field of research covered by the biologists of that time. The great credit of inaugurating work on the biological control of Noxious Weeds must be given to that extremely progressive body, the Hawaiian Sugar Planters Association, and their very capable entomologists. The plant Lantana camara, originally introduced about the year 1860 as an ornamental shrub, soon began to take possession of large areas of land in the various islands of the Hawaiian group, just as it has done over large tracts of similar land in the warmer portions of Eastern Australia. The well-known entomologist Koebele, while collecting in Mexico in 1898, noticed that the seeds of this planrt in its native state were damaged by insects which bred in them. This suggested to him the idea that the profuse seeding of the plant might be checked, or even completely prevented, if these insects could be firmly established on the weed lantana in the Hawaiian Islands. Four years later, his idea having been officially approved, he again visited Mexico, and this time made a thorough study of all the insects that feed on lantana. More than twenty different species of these were shipped back to the Chief Entomologist, Perkins, in Honolulu, and eight of these were soon successfully established on the island of Oahu, of which Honolulu is the capital. Of these the most important were the species that prevent the seeding of the plant. The larvae of an Agromyzid fly, Agromyza lantanae proved to be the most effective of these; it attacks the berries before they are mature, and causes them to shrivel up, destroying the seeds within them. The Butterfly larvae feed chiefly on the fiowers, and are therefore also of great value in preventing the formation of the fruit. The result of these introductions was a very marked decrease in the amountof infestation by lantana in the drier parts of the islands. With the aid of some judicious mechanical clearing, these parts have now been rendered safe for all time from being overrun by this dangerous weed

Ethics review: 'Living wills' and intensive care – an overview of the American experience

Withdrawal and limitation of life support in the intensive care unit is common, although how this decision is reached can be varied and arbitrary. Inevitably, the patient is unable to participate in this discussion because their capacity is limited by the nature of the illness and the effects of its treatment. Physicians often discuss these decisions with relatives in an attempt to respect the patient's wishes despite evidence suggesting that the relatives may not correctly reflect the patient's desires. Advance decisions, commonly known as 'living wills', have been proposed as a way of facilitating the maintenance of an individual's autonomy when they become incapacitated. Others have argued that legalising advance decisions is euthanasia by the back door. In October 2007 in England and Wales, advance decisions will become legally binding as part of the 2005 Mental Capacity Act. This has been the case in the USA for many years. The purpose of the present review is to examine the published literature regarding the effect of advance decisions in relation to the provision of adult critical care

The Modes in Byzantine Music

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The evolution of the class Insecta

The subject of this paper is one which is admittedly full of difficulty, yet at the same time one of the profoundest interest, viz., the Evolution of the Insects as a Class from some ancestral type which was not an Insect, but something more primitive in its general structure. In attempting this task, I must first of all classify and pass in review the various theories that have been advanced by famous Zloologists or entomologists to account for the origin of this Class, admittedly the highest development within the Phylum Arthropoda. Each main hypothesis will be examined on its merits and tested as to its validity. Having carried out this task, I then propose to state the position as it appears to me and to offer a new theory which attempts to embrace all the known facts of the case

The trout-food insects of Tasmania. Part. I; A study of the genotype of the Mayfly genus Atalophlebia and its life history

The study of the more important insects which serve as food for trout in any given country is, in these days of applied science, an indispensable preliminary to a full understanding of the methods by which a successful and permanent trout-fishery can be maintained in that country. For many years I have been interested in those groups of aquatic insects which are of most importance as trout-food. But I have never found, anywhere in Australia, any public realisation of their economic importance, and thus it comes about that even to-day, when scientific ideas have penetrated further into the public mind than ever before, it still remains impossible for any work on such insects to be carried out officially. The alternatives are, either to leave the subject alone and let the knowledge gained die with one, or to work at the subject slowly in one’s spare time, in the hope that something of value may come out of it in time to save the inland fisheries of Australia from deterioration due to lack of scientific knowledge

Toward a Temporal Theory of Language

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67931/2/10.1177_007542429702500404.pd