Range Extensions in North American Hispinae (Coleoptera: Chrysomelidae)

Thirty-nine new state or provincial records are presented for 22 species of North American Hispinae

Generic reassignment of species in the tribe Cephaloleiini Chapuis, 1875 (Coleoptera: Cassidinae)

Thirty-one species of Cephaloleiini are assigned to new genera, creating new combinations: 19 to Parimatidium Spaeth, 10 to Stilpnaspis Weise, and two to Demotispa Baly. Demotispa peruana membrata Uhmann, 1957 is raised to full species status. As the transfer of Cephaloleia limbatum Pic to Demotispa creates a homonymy, the species is renamed Demotispa pici nomen novum

Noteworthy Records of Hispines from Belize (Coleoptera: Chrysomelidae)

Cephaloleia consanguinea Baly, Cephaloleia fulvolimbata Baly, Cephaloleia ruficollis Baly, Chalepus amabilis Baly, Chalepus brevicornis (Baly), Chalepus pici Descarpentries and Villiers, Microrhopala erebus (Newman), Octhispa bimaculata Uhmann, Octotoma championi Baly, Pseudispa tuberculata Staines, Sceloenopla erudita (Baly), Stenispa guatemalensis Uhmann, Sumitrosis gestroi (Weise), and Sumitrosis terminatus (Baly) (Coleoptera: Chrysomelidae: Cassidinae) are new country records of hispine chrysomelids for Belize, based on collections cited herein. These collections also document new host records for Calyptocephala gerstaeckeri Boheman (Chamaedorea tepejilote Liebm., Arecaceae), Cephaloleia consanguinea (Heliconia bourgaeana Petersen, H. collinsiana Griggs, H. latispatha Benth., H. wagneriana Petersen; Heliconiaceae), and Cephaloleia perplexa Baly (Heliconia bourgaeana, H. latispatha; Heliconiaceae)

Comparison between PI and PR Current Controllers in Grid Connected PV Inverters

This paper presents a comparison between Proportional Integral (PI) and Proportional Resonant (PR) current controllers used in Grid Connected Photovoltaic (PV) Inverters. Both simulation and experimental results will be presented. A 3kW Grid-Connected PV Inverter was designed and constructed for this research

A revision of the genus Acentroptera Guérin-Méneville, 1844 (Coleoptera: Chrysomelidae: Cassidinae)

The species of the genus Acentroptera Guérin-Méneville, 1844 are revised. Thirteen species are treated as valid and are illustrated. A neotype is designated for A. tessellata Baly. Acentroptera maculata Pic from Brazil and A. rubronotata Pic from Brazil are treated as incertae sedis. Acentroptera bita n. sp. and A. lineata n. sp. both from Panama are described as new. A key to the 13 treated species is presented. Five species appear to be associated with bromeliads (Bromeliaceae)

A Preliminary Checklist of the Hydrophiloidea (Coleoptera) of Maryland

The only lists of Hydrophiloidae (Coleoptera: Hydrophilidae, Helophoridae, Hydrochidae, and Hydraenidae) from the mid-Atlantic region are Ulke (1902) who reported 46 species from the District of Columbia and Matta (1974) who presented keys and short descriptions for the 49 aquatic species of Hydrophilidae of Virginia. The following checklist records 103 species (75 aquatic) from Maryland. Comparable lists of aquatic species for other states are as follows: 53 species recorded from Florida by Young (1954); 20 species recorded from Ithaca, New York by Swenson (1982); 67 species from North and South Carolina by Brigham (1982); and 47 species from Illinois by Wooldridge (1967). Hatch (1965) recorded 128 species (of all habitats, 102 aquatic) from the Pacific Northwest; and 88 species (67 aquatic) reported from New York by Leng (1928)