Studies of the Coccoidea. 3. The genera Chentraspis, Clavaspis, Lindingaspis and Morganella in Queensland

The genera Chentraspis, Clavaspis and Morganella are represented in Queensland by the genotype only, while Lindingaspis is represented by three species. Each of these except two species of Lindingaspis is widely distributed. Clavaspis herculeana (Doane and Hadden), M. longispina (Morgan) and L. rossi (Maskell) are recorded from a variety of hosts and are of minor economic importance

Studies of the Coccoidea. 6. New genera and new species of Aspidiotini

New species of Aspidiotini with a constricted thorax and dorsal pygidial chitinization are Mimeraspis cuspilobis, M. rotundus, Myrtophila curvata, M. adnatae, M. suticollis, Dichosoma convexa, Achorophora obliqua, A. divergens, Diaphoraspis orbata, D. incisa, D. compacta, Aspidonymus woodwardi, Acontonidia triangularis, Duplaspidiotus magnus and Pseudotargionia inconspicua. The first seven of the nine genera mentioned are also new

Studies of the Coccoidea. 10. New species of Diaspididae

New species of scale insects from Queensland described in the family Diaspididae are Ancepaspis longicauda, A. magnicauda, A. asperata, A. reticulata, A. rotundicauda, A. striata, Andaspis numerata, Aulacaspis australis, Doriopus bilobus, Phenacaspis difissata, Poliaspis attenuata, and P. elongata. The genus Doriopus is also new

Studies of the Coccoidea. 2. Revision of some of the Australian Aspidiotini described by Maskell

Examination of type specimens of some of the Aspidiotini from Australia described by Maskell and other relevant material has enabled the following conclusions. Aspidiotus acaciae Morgan, Pseudaonidia junctiloba Marlatt and Aspidiotus junctilobius Froggatt are synonyms of Aspidiotus eucalypti Maskell, which is correctly placed in the genus Neomorgania and now becomes the genotype. The variety comatus Maskell of Aspidiotus eucalypti Maskell represents a distinct species, and belongs to the genus Pseudotargionia. Aspidiotus virescens Maskell is a synonym of Diaspis fimbriata Maskell which is now made the genotype of a new genus Megaspidiotus. The characters of Aspidiotus casuarinae Maskell conform with those of the genus Pseudaonidia but as the type appears to be an immature adult further material is needed for examination. These species have been re-described and re-illustrated

Nitrate stable isotopes and major ions in snow and ice samples from four Svalbard sites

Increasing reactive nitrogen (N-r) deposition in the Arctic may adversely impact N-limited ecosystems. To investigate atmospheric transport of N-r to Svalbard, Norwegian Arctic, snow and firn samples were collected from glaciers and analysed to define spatial and temporal variations (1 10 years) in major ion concentrations and the stable isotope composition (delta N-15 and delta O-18) of nitrate (NO3-) across the archipelago. The delta N-15(NO3-) and delta O-18(NO3-) averaged -4 parts per thousand and 67 parts per thousand in seasonal snow (2010-11) and -9 parts per thousand and 74 parts per thousand in firn accumulated over the decade 2001-2011. East-west zonal gradients were observed across the archipelago for some major ions (non-sea salt sulphate and magnesium) and also for delta N-15(NO3-) and delta O-18(NO3-) in snow, which suggests a different origin for air masses arriving in different sectors of Svalbard. We propose that snowfall associated with long-distance air mass transport over the Arctic Ocean inherits relatively low delta N-15(NO3-) due to in-transport N isotope fractionation. In contrast, faster air mass transport from the north-west Atlantic or northern Europe results in snowfall with higher delta N-15(NO3-) because in-transport fractionation of N is then time-limited

The biology, economic importance and control of the pine bark weevil, Aesiotes notabilis Pasc.

Early attempts at green pruning hoop pine, Araucaria cunninghamii, in the Mary Valley plantations were followed by attacks of the pine bark weevil, Aesiotes notabilis Pasc. In addition to hoop pine, other native species of Araucaria, species of Agathis and several exotic conifers of the genus Pinus are hosts. Attacks by Aesiotes are initiated in open wounds shortly after they are produced. Such wounds are rare on trees in the natural rain forest, where the insect is of little economic importance