Collections from small permanent or ephemeral surface waterbodies, some of them brackish, in the Florida Keys yielded 2 species of calanoid, 17 species of cyclopoid, and 11 species and subspecies of harpacticoid copepod crustaceans. Most of the species are either cosmopolitan or widely distributed in the Neotropics. Even so, these collections have established new records for the U.S.A. for Mastigodiaptomus nesus, Halicyclops bowmani, Paracyclops bromeliacola, Nitokra lacustris sinoi, and Schizopera tobae cubana, and new records for the state of Florida for Apocyclops dimorphus, Diacyclops bernardi, Cletocamptus fourchensis, Nitocrella aestuarina, Pseudectinosoma cf. minor, and Tisbella pulchella. Already known from two locations in central Florida, Bryocyclops muscicola was found in a bromeliad on Duck Key. Another species found in a bromeliad, Paracyclops bromeliacola, was previously known only from Brazil; like B. muscicola, this species may have been introduced into Florida by human agency.

Species of the water beetle family Hydrophilidae (Coleoptera) occurring in Mongolia are summarized. Detailed locality records and comments on habitat preferences from species collected during the 2004 Selenge River Basin Expeditions are provided. Enochrus quadripunctatus (Herbst) is recorded from Mongolia for the first time, with new locality records for eight additional species. The total number of species recorded from Mongolia now stands at 24.

Seven bays and four streams were sampled for surface floating pupal exuviae of Chironomidae (Insecta: Diptera) from the Lake Hovsgol watershed, Mongolia in July of 1997. A total of 52 taxa were identified with 12 species being new records for Mongolia and 1 species being a new record for the Lake Hovsgol Region. Communities of emerging chironomidae were compared between lake bay and lake affluent stream environments to determine whether affluent stream chironomids were recruited in the ultra-oligotrophic lake bays. Hierarchical cluster analyses were used to classify sites for this comparison. Bays and streams were classified together based on physical and habitat data, but formed distinctly different classes based on the chironomid community data. These two classification schemes were incongruent at a correlation of -.01. Stream sites and bay sites were comprised of either rheophilic or limnophilic chironomid communities, respectively, resulting in their separate classifications. One bay site located near Hatgol, a small town at the southern tip of Lake Hovsgol, was unique because it was composed of chironomids tolerant to elevated concentrations of organic waste.

A lectotype is selected for Usnea hesperina, overturning the previously selected neotype.

Three new species of Trigonidium, T. manuka n.sp., T. napau n. sp. and T. molukeia n. sp. are described —first two species are from Hawaii Island, the last from Oahu.

Bibliographic references and information on type specimens of 18 nominal species of Indo-Pacific Muraenidae, which were inadvertently omitted from the Type Catalog of Indo-Pacific Muraenidae (Böhlke and Smith, 2002), are presented. In addition, information is presented on one species that was described subsequently. Corrections to the accounts of 11 other species are presented.

Six new species of fossil Rhabdomastix Skuse, 1890 crane flies are described from Baltic amber (Eocene). Their affinities with other recent and fossil species of Rhabdomastix limoniids are discussed. A key for Baltic amber species of Rhabdomastix is given.

SPECIES NOVAE: Rhabdomastix grussica n. sp., Rhabdomastix mastix n. sp., Rhabdomastix redophilax n. sp., Rhabdomastix ratix n. sp., Rhabdomastix setix n. sp., Rhabdomastix lutix n. sp.

Propimelodus caesius is described as a new species of Pimelodidae from the main channels of the Amazon River and its large tributaries. This common yet rarely seen species is distinguished from its closest relative, P. eigenmanni, by its relatively larger eye, toothed metapterygoid bone, greater number of vertebrae, narrowly spaced anterior nostrils, and violet to blue color. Additional anatomical details are described for the diagnostic palatine bones of Propimelodus. Derived features of the basipterygium, nuchal plates and posterior cleithral process are introduced that further help to distinguish and place Propimelodus among pimelodids.

Species novum: Propimelodus caesius Parisi, Lundberg & DoNascimiento

Descriptions, illustrations and habitat characteristics are given for the previously unknown larvae and pupae of Tipula (Arctotipula) hovsgolensis T. (A.) caliginosa and T. (A.) quadriloba and pupae of T. (A.) salicetorum. In addition the larval stage of Tipula (A.) conjuncta conjuncta is redescribed. For the first time in Tipula (Arctotipula) microscopic hairs on the abdomen, length of the abdominal tubercles, length of the lateral abdominal setae, the arrangement of hairs on the spiracular lobes and the sclerotisation of spiracular field are discovered as the main characters to distinguish the larvae. Pupae of this subgenus can be separated by the shape and arrangement of the spines on the terminal segments. Larvae of most these species develop on the benthic and riparial zones of Mongolian rivers and springs; a few develop in marshy meadows.

Four new epigean species in the genus Litocampa from the southeastern United States are described: L. aridus, L. ecuscastra, L. grishami, L. ultimus. A key that will assist in identifying the six known epigean species of Litocampa is given.

A total of 562 species of snails and slugs are known from Jamaica, of which 505 (90%) are endemic. Both sympatric and allopatric species diversity are high and the terrestrial mollusk fauna is as diverse as any in the world for the size of the island. Although less than 15% of the original forest cover remains and deforestation continues, many snail species survive in the secondary forest that covers more than 25% of the land area. Perhaps as much as 90% of the mollusk fauna still exists, although some species have suffered great contractions of range. Tree snails of the genus Anoma (Urocoptidae) are the most critically endangered and some are probably already extinct. Many Jamaican species have naturally small ranges, so even with intensive sampling, establishing that a species is no longer extant is difficult, especially if the type locality is no more precise than “Jamaica”. A few endemic species, particularly those adapted to dry conditions, are expanding their ranges.

Eight taxa formerly considered synonyms or subspecies are confirmed as full species: Priotrochatella pulchra (Helicinidae), Geomelania gracilis and G. magna (Truncatellidae), Leidyula trichroma (Veronicellidae), Aerotrochus mcnabianus (Sagdidae) and Pleurodonte amabilis, P. catadupae and P. candescens (Pleurodontidae). Fourteen taxa are synonymized: Choanopoma dislocata tentatively with Parachondria shepardiana (Annulariidae); Geomelania affinis with G. jamaicensis, G. exilis with G. beardsleana, G. jarvisi with G. minor, and G. striosa pumila with G. striosa (Truncatellidae); Varicella leucozonias striatella with V. leucozonias (Oleacinidae); Urocoptis lata with U. producta and Pupa lata tentatively with U. sanguinea (Urocoptidae); Helix albicans with Stauroglypta anthoniana (Sagdidae); Helix lindsleyana tentatively with Pleurodonte atavus, Helix soror var. latior with Pleurodonte peracutissima; Pleurodonte tridentina chittyana and P. t. schroeteriana with P. tridentina (Pleurodontidae); and Dialeuca jacobensis with D. conspersula platystyla. Pleurodonte carmelita (Férussac, 1821) is preoccupied by Helix carmelita Lichtenstein, 1794 and is replaced by Pleurodonte mora (Griffith & Pidgeon, 1834). Bulimus macrospira is transferred to Sigmataxis (Oleacinidae), Helix brevis to Happiella (Systrophiidae) and Helix alveus