Redescription of the adult male and description of second-instar male, prepupa and pupa of Ceroplastes japonicus Green (Hemiptera: Coccoidea: Coccidae)

The adult male of Ceroplastes japonicus Green is redescribed and illustrated and compared with other known males of Ceroplastes. In addition, the 2nd-instar male, male test, prepupa and pupa of C. japonicus are also described and illustrated for the first time

Observations on the biology of Parthenolecanium rufulum in northeastern Italy, with a redescription of the first and second instar females

This paper presents some observations on the life history, phenology and morphology of Parthenolecanium rufulum (Cockerell), a Palaearctic soft scale species, widely distributed in European countries and especially common on Quercus. The study was carried out in North-eastern Italy on Quercus robur trees between July 2006 to June 2008. P. rufulum has one generation/year and overwinters as the 2nd-instar nymph. Moulting to adult female occurs from mid April onwards. Egg-laying occurs between late April and late May. Egg hatching occurs from the end of May. First-instar nymphs settle on the under surface of the leaves and moult to 2nd-instar nymphs in August. Starting from mid September, the 2nd-instar nymphs gradually migrate from the leaves to the twigs to overwinter. This migration is completed during the first 10 days of December. The pattern of phenology in Italy is about a month earlier than in Central Europe. The 1st- and 2nd-instar females of P. rufulum are also redescribed and illustrated; no males were noted and reproduction was parthenogenetic. In addition, some observations on the predator Anthribus nebulosus Forster (Coleoptera: Anthribidae) are reported

The adult male and male nymphal instars of Ceroplastes rusci (Linnaeus) (Hemiptera: Coccoidea: Coccidae).

The morphology of the adult male and male nymphal instars of C. rusci are described and illustrated. A key to the adult males of the described Ceroplastes and Waxiella male species (Ceroplastes ceriferus (Fabricius), C. cirripediformis Comstock, C. japonicus Green, Waxiella berliniae (Hall) and Waxiella sp.) is provided and their taxonomic affinities discussed

Test of methodology for developing a large wood budget: A 1-year example from a regulated gravel bed river following ordinary floods

Wood budgeting is a current approach for quantifying the spatial and temporal variations of in-channel large wood (LW). Despite its importance for a proper LW management, the assessment of LW budget is still a challenge because of the complexity of LW dynamics. Focusing on a 3.7 km-long gravel-bed reach of the Piave River (North-eastern Italy), this study proposes an attempt to assess a short-term (1 year) LW budget as a consequence of ordinary floods (RI < 1 yr). Lateral recruitment, mobilization and deposition of LW were investigated by two field surveys conducted at the beginning and end of the study period. The lateral input was evaluated by measuring, positioning and tagging all standing trees (diameter 65 0.1 m) within a 20 m-wide buffer strip along the floodplain and island perimeters. Bank erosion was checked by measuring the riverbanks with a differential Global Positioning System (dGPS), during the first and second survey. Contemporarily, the position and characteristics of each fluvial wood element (diameter 65 0.1 m and length 65 1 m) within the active channel was determined. These short-term analyses revealed that ordinary floods are not able to induce relevant variations in the LW abundance and redistribution of in-channel wood. Nevertheless, the results highlighted the role of riverbank erosion in supplying LW to the active channel. Episodic inputs of LW from bank erosion were also observed during ordinary flood events, introducing 33% (0.21 m3 \ub7km 121 ) of the total LW input amount. Results on LW transport showed that, in the Piave River, both deposition and mobilization of LW may also occur during low flow conditions (i.e. 14% of bankfull stage) without causing important variations in the wood quantity. However, the low magnitude of floods was reflected in the small amount of LW involved in the input (0.4 m3 \ub7km 121 ) and output (0.7 m3 \ub7km 121 ) processes, pointing out that sites for deposition and mobilization of LW are conditioned by flood magnitude and morphological settings. The combination of recruitment, mobilization and deposition processes resulted in a slight decrease of LW storage ( 120.07%), while including also the anthropic removal of LW the amount of wood storage decreased to 129.7%. Despite the short-term investigation, this work sheds further light on LW processes, providing useful results for the management of LW in wide piedmont rivers

Description of the immature female instars of Ceroplastes rusci (Linnaeus) (Hemiptera: Coccidae)

The immature female instars of the fig wax scale, Ceroplastes rusci (L.), are redescribed and illustrated here with the aim of improving our knowledge on its morphology and phenology by the correct identification of the pest stages present on the host plant. A key to different instars is also provided. The biology of this species, which has recently increased in abundance in fig cultivation areas in Messinia (Greece), is briefly discussed

Redescription of the adult female and 1st-instar nymph of Ceroplastodes dugesii (Signoret, 1886) (Hemiptera : Coccidae) and description of the other immature stages

Ceroplastodes dugesii (Signoret), the Mexican wax scale, is the type species of the genus but previous descriptions have not included some important characters. With the collection of new material of this species off Acacia from Mexico, the opportunity is taken to illustrate and either describe or redescribe all stages apart from the adult male

Analysis of Bedload Mobility in an Andean Stream

High gradient streams form the majority of the mountain drainage network and the sediment dynamics that occur here influence the features of sediment deliv-ered downstream. In this sense, the bedload is the transport process that regards the coarser particles, which are mobilized by rolling, sliding, and saltation on the channel bed. In mountain streams, bedload can be the main sediment transport process, there-fore, its analysis and quantification are crucial. However, the importance of bedload contrasts with the fact that it is difficult and impractical to monitor due to its impul-sive nature. Different direct and indirect methods were used during the last decades to cover this gap. One of these is the bedload tracing method. In this work, bedload tracing was used to analyze the sediment dynamics in a high-gradient Andean stream, the Estero Morales, located in central Chile. The Estero Morales stream exhibits an average slope of 14.0% and a D50 = 59 mm. The basin (27 km2) extends between 1780 and 4497 m a.s.l., hosting the San Francisco glacier (1.8 km2) that strongly affects the hydrological regime. In January 2016, 197 clasts tracers were seeded along the Estero Morales stream and their mobility was monitored by 9 surveys between January and March 2016. During this study period, the tracers experienced an average transport distance equal to 12.0 m, while the average diameter mobilized was 95.0 mm. However, the mobility observed was not clearly related to the hydraulic forcing, stressing the complex transport dynamics of a mountain stream