caddisflies of 138 montane and alpine lentic habitats, primarily lakes, of 7 northern Colorado counties are reported for the first time. Our objective was to provide species records of adult caddisflies from high -altitude lentic habitats that may potentially be impacted by current and future global climate change. Field collections of adults and captive rearing of larval specimens were coupled with unpublished records and an extensive review of published records, resulting in 541 confirmed caddisfly species records. Forty-nine caddisfly species, representing 24% of all known Colorado species are documented. Seven families and 21 genera are represented. The Limnephilidae comprised 76% of the 49 recorded species. The other 6 families were represented by only 1-4 species. One species was documented from alpine lakes only, 25 species from both montane and alpine lakes, 22 species from montane lakes only, and 1 species record could not be attributed to an elevation zone. We documented 6 regionally endemic species, 2 of which were recognized as vulnerable to extinction. Montane and alpine lakes are vulnerable ecosystems likely to be impacted by climate change. Comprehensive faunal surveys are key to understanding long-term biodiversity changes and establishing conservation needs and priorities. Species lists of taxa are important to monitor future faunal biodiver-sity changes.

Montiphylax, a new genus within the Limnephilidae, is proposed to include Philocascaalba, P.antennata, and P.thor. Characters for the adults and larvae are presented to separate Montiphylax from Philocasca. A summary of the distribution and life history of the Montiphylax species is provided. A key to ease separation of the known North American caddisfly larvae with gill clusters of single filaments is given.

Six new Allomyia species from the western United States are described: Allomyia kondratieffi sp. nov., Allomyia leei sp. nov., Allomyia meachamensis sp. nov., Allomyia sarahae sp. nov., Allomyia sheldoni sp. nov., Allomyia whatcomensis sp. nov. The majority of these species were collected from small headwater, high altitude streams on relatively isolated mountain ranges. These species bring the number of known North American Allomyia to 18. Additional notes on state/county distribution records, taxonomic problems, species diagnostics and adult emergence periods for the 18 North American species are provided.

Based on examination of ~180,000 specimens from 695 collections of 443 localities collected from the 1930s to 2015 we report 295 species of caddisflies from Michigan. Of these, 41 are reported from the state for the first time. Another 18 species previously reported from Michigan are listed as doubtful. The 11 most abundant species collectively represented over half of all specimens collected. Conversely, 80 species were known from <10 specimens, and 27 species from a single specimen. The Michigan fauna is similar to those of Minnesota and Ohio, adjacent states with comparable recent collecting effort. Regional and habitat affinities for each Michigan species are reported herein. Due to the high level of species discovery over the last few years, despite a >80-year collecting history, it is likely that additional species remain undiscovered in the state.

Seven new species of Ochrotrichia Mosely, 1934 are described and illustrated from western United States and Mexico. Clarification of several of the Donald Burdick manuscript names is provided. Suggestions for habitats where future collection emphasis should be directed is included.

Abstract. An annotated list of Nevada Trichoptera and related literature with information on unpublished new records is provided. A total of 137 Trichoptera species are now known from Nevada. Four genera, without confirmed species, and 76 species are newly reported. One species, Ecclisomyia simulata Banks 1920, is resurrected from synonymy.

Caddisflies were collected at 181 wall seep, stream, river, and lake habitats in 7 counties in northwest and north central Washington over a 6-year period. From 17,405 specimens, we identified 164 adult caddisfly species within 62 genera and 16 families. Twenty taxa were new state records, bringing the number of species currently reported from Washington to 230. Species assemblages were compared to altitude, physicochemical factors, aquatic habitats, and land use (urban, agriculture, and forest) on the west and east sides of the North Cascade Range. Species richness showed significant positive correlations to altitude and pH and showed significant negative correlations to total phosphorus, total nitrogen, and specific conductivity, as well as especially to channel embeddedness. A multilevel hierarchical clustering model separated wall seeps, streams, and rivers into geographic and land-use regions based on adult caddisfly assemblages. We used a multimetric index (caddisfly tolerance index [CTI]) to determine environmental tolerance levels for adult caddisfly species. The index performed well in distinguishing among the effects of total phosphorus, total nitrogen, specific conductance, and channel embeddedness on the distribution of caddisfly species. These CTI values provide baseline information for monitoring changes in ecosystem health in drainages throughout Washington landscapes.

Background The North American Trichoptera larvae are poorly known at the species level, despite their importance in the understanding of freshwater fauna and critical use in biomonitoring. This study focused on morphological diagnoses for larvae occurring in the Churchill, Manitoba area, representing the largest larval association effort for the caddisflies at any given locality thus far. The current DNA barcode reference library of Trichoptera (available on the Barcode of Life Data Systems) was utilized to provide larval-adult associations. Results The present study collected an additional 23 new species records for the Churchill area, increasing the total Trichoptera richness to 91 species. We were able to associate 62 larval taxa, comprising 68.1% of the Churchill area Trichoptera taxa. This endeavor to identify immature life stage for the caddisflies enabled the development of morphological diagnoses, production of photographs and an appropriate taxonomic key to facilitate larval species analyses in the area. Conclusions The use of DNA for associations of unknown larvae with known adults proved rapid and successful. This method should accelerate the state-of-knowledge for North American Trichoptera larvae as well as other taxonomic lineages. The morphological analysis should be useful for determination of material from the Churchill area.

Fragmentation of habitats and distance between drainages in the semi-arid Lower Colorado River Basin has contributed to development of disjunct populations of caddisflies in the region. Caddisflies in streams cluster into discrete regional assemblages in the basin with significantly different assemblages. Distances between drainages in Arizona will likely increase genetic drift in disjunct populations of caddisflies and further reduce genetic variability, which may be important in conservation.

The U.S. Geological Survey, in cooperation with the C.P. Gillette Museum of Arthropod Diversity (Colorado State University, Fort Collins, Colorado), compiled collection record data to document the historical and present-day occurrence of mayfly, stonefly, and caddisfly species in the South Platte River Basin. Data were compiled from records collected between 1873 and 2010 to identify where regional knowledge about species occurrence in the basin is lacking and to encourage future researchers to locate additional populations of these poorly understood but very important organisms. This report provides a description of how data were compiled, a map of approximate collection locations, a listing of the most recent collection records from unique locations, general remarks for each species, a species list with selected summary information, and distribution maps of species collection records.

Descriptions and figures are provided for two new species of Ochrotrichia Mosely 1934 from Southern California and Arizona, United States, O. bickfordae, n. sp., and O. bogani, n. sp. Both species have the combination of a relatively simple 10th tergum and long inferior appendages.