New regional distribution records and range extensions involving one Canadian province, 17 Mexican states, 10 USA states, and five Central American countries are given for 53 species of Ephemeroptera. In Mexico, states with the greatest number of new species records include Queretaro, Mexico, Nueva Leon and Tamaulipas. For the USA, states with the greatest number of new species records include Oklahoma, Wisconsin, Kentucky and Texas. Farrodes flavipennis, Lachlania fusca and Leptohyphes peterseni records are the first for Mexico and North America, and the presence of Tricoryhyphes mulaiki in Texas represents a new USA record. New Central American country records include Americabaetis pleturus in El Salvador, Camelobaetidius arriaga and Thraulodes zonalis in Guatemala, Euthyplocia hecuba in Honduras, and Thraulodes pacaya in Costa Rica. Highly disjunct northern range extensions discovered for Tricorythodes robacki and T. albilineatus in the St. Croix River on the Minnesota/Wisconsin border parallel a pattern seen in some other psammophilous mayflies in eastern North America. Far eastern Oklahoma records of Acentrella nadineae, Caenis macafferti, and Eurylophella prudentalis demonstrate a common relationship between the Central Highlands and the Southern Appalachians.

A newly discovered larva of Baetidae (Insecta, Ephemeroptera) is described from Nunavut, Canada as Kirmaushenkreena zarankoae, n. gen. and n. sp. The new taxon has a unique combination of generic characteristics, including unusual claw armature that is diagnostic. Closest relatives of the new genus may possibly be in the Indobaetis complex of genera. The absence of a villopore sets the new species apart from other far northern North American baetine species, and other differences and convergent similarities such as claw setation and gill dimensions among that fauna are discussed.

Twelve new species of Psyllipsocus are described from the United States, Mexico, and Guatemala. Augmentations of existing descriptions are included for P. hyalinus García Aldrete, P. maculatus García Aldrete, P. oculatus Gurney, P. ramburii Selys-Longchamps, and P. yucatan Gurney. A key to the 24 known species of the area, including the Greater Antilles (Cuba) is presented. Relationships within the genus are discussed briefly

Calathus libanensis deuvei ssp. n. is described from southern Turkey. A list of the species of Calathus Bonelli, 1810 collected from Amanos mountains is then presented. New localities are given for some species of Calathus Bonelli, 1810 with a descriptive key and taxonomic reviews. This taxonomic review is based on the description of the male genitalia.

The genus Epactris Meyrick, 1905 is recorded from China. E. capulus sp. nov. is described and illustrated, as the first record of this genus from China. The new species is very similar in appearance to E. alcaea from India, but it can be distinguished easily from the latter based on the characters of forewing. The adult photos of those two species and a photo of the male genitalia of the new species are provided. All type specimens of the new species are deposited in HUNAU (Institute of Entomology, Hunan Agricultural University, China).

James Needham and Cornelius Betten in 1901 published one the first studies of aquatic insects in North America providing life history information for a number of taxa, and descriptions of 10 new species and two new genera from the Adirondacks in New York. However, since this early publication, relatively little taxonomic research and field surveys have been conducted targeting aquatic insects in the Adirondack Park. The diverse array of aquatic habitats present in New York harbors numerous aquatic insect taxa. Research funded by the NYSDEC State Wildlife Grants and the NYS Biodiversity Research Institute on Ephemeroptera, Plecoptera and Trichoptera biodiversity in eastern New York have resulted in the first ever comprehensive assessment of aquatic insects in the region. Distributional records were obtained from primary literature, institutional collections and field surveys. During our four-year study of the Park more than 25,000 specimens from 465 locations were examined. We report 509 species of EPT from the Adirondack Park of which 99 are reported from New York State for the first time. Our field surveys have also resulted in the discovery of several species new to science and numerous species of conservation concern.

A new species of long-palped crane fly, Tipula (Vestiplex) dhalma, is described and illustrated from adult specimens collected in the Primorskiy Kray of the Far Eastern Federal District of Russia. This new species is most similar to T. (V.) scripta scripta Meigen, 1830 and other species of “scripta” complex, based on antennal and male and female genitalic structures, but differs in several features including the morphology of the male ninth tergum, structure of female hypovalvae and wing pattern.

The first fossil species, belonging to genus Afrolimnophila Alexander, 1956 and a new species belonging to subgenus Dactylolabis (Eolabis) Podenas, 2003 are described from Baltic amber (Eocene) preserved in the collection of the Geologisch-Paläontologischen Institut der Universität Hamburg, Germany. Their affinities to recent as well as fossil species are discussed.

Two species of Lagynogaster are described as new to science: L. saetosus sp. n. and L. yunnanensis sp. n. Species of Lagynogaster from China are keyed.

The genus Chortinaspis Ferris from China is reviewed and a new species, Chortinaspis tianmuensis Wei & Feng, sp. nov., is described. Chortinaspis biloba Maskell is also redescribed from specimens collected in China. A key to the species of Chortinaspis and a checklist of all known species of the world is provided.

This paper describes one new species P. cycasae sp. nov. of Pseudaonidia from China. A key to species of the genus Pseudaonidia from the Oriental Region is proposed and a checklist of Oriental Region species is provided.

Male and macropterous female of Ctenothrips smilax Bhatti, 1976 are first described and illustrated, together with brachypterous female which has already been reported by Bhatti in 1976. The species was firstly reported from China.

All specimens are deposited in the Entomological Museum of Northwest A&F University (NWAFU).

Two new species, Allognosta gongshana sp. nov. and Allognosta zhuae sp. nov., are described from Oriental China.

A new species, Chalarus polychaetus sp. nov., of the genus Chalarus from China is described. Three species, C. angustifrons Morakote, 1990, C. fimbriatus Coe, 1966 and C. longicaudis Jervis, 1992, are recorded from China for the first time. A key to the species of the genus from China is presented.

One new species, Helina submaculitibia sp. nov., is described from China. The new species belongs to the Helina hirsutitibia-group, based on morphological and genitalic characters. A differentiation between the new species and its morphological relatives is provided.

A Rhopalopsole species of the dentata group, R. guangdongensis, is described as new to science from China. Its relationships with related species are discussed.

The formicine ant genus Plagiolepis in Arabia is reviewed and an identification key to the worker caste is given. Eight species are recognized, two of which, P. boltoni and P. juddi are described as new. Two species, Plagiolepis abyssinica Forel and Plagiolepis schmitzii Forel are redescribed.

The genus Invreiella Suárez is revised. The two species currently included in Invreiella, I. cardinalis (Gerstaecker) and I. satrapa (Gerstaecker), are illustrated and additional distribution records are presented. One new species, I. curoei, female, is described from Puebla, Mexico, and a key is provided for the three endemic species of the genus Invreiella from Mexico. Males have not been described. Relationships between Invreiella, Pseudomethoca, and Myrmilloides are discussed.