The results of the first study of the dragonfly fauna in northwest Bosnia are presented. Field surveys were conducted in summer 2012 and 2013, resulting in the identification of 36 species. Out of these, 34 are new for the region. The present paper gives a detailed overview of the results and a comparison of the dragonfly fauna composition of the region studied with the neighboring areas within Bosnia and Herzegovina and Croatia is made. The most abundant species were: Calopteryx virgo (Linnaeus, 1758), Sympetrum sanguineum (Müller, 1764), Onychogomphus forcipatus (Linnaeus,1758), Somatochlora meridionalis Nielsen, 1935, Calopteryx splendens (Harris, 1782) and Platycnemis pennipes (Pallas, 1771). Noteworthy are the records of Chalcolestes viridis (Vander Linden, 1825) and Coenagrion scitulum (Rambur, 1842), two species that are rare in Bosnia and Herzegovina, and also Coenagrion ornatum (Selys, 1850) and Cordulegaster heros Theischinger, 1979, species of European conservation concern. Distribution and the status of these species and the conservation of dragonfly species in the country are briefly discussed. The data collected represent an important contribution to the knowledge of the dragonfly fauna of the Una River basin and Bosnia and Herzegovina.

Records of the biting midge Forcipomyia paludis (Macfie, 1936) from Slovenia and Bosnia and Herzegovina are reported herewith as the first finds of F. paludis in both countries, together with new records from Croatia and Sweden. This biting midge is a temporary ectoparasite of dragonfly imagines and the only ceratopogonid species known in Europe to feed specifically on this insect group. Forcipomyia paludis is already known in 18 European countries. Prior to this report, F. paludis was known to infest 67 dragonfly species in Europe. Thirteen dragonfly imagines from 11 sites in Slovenia, 27 imagines from 13 sites in Bosnia and Herzegovina and six imagines from two sites in Croatia having F. paludis on their wings were recorded. Additional data for 50 imagines from 15 sites in Sweden are also presented. In Slovenia, the species is known to occur in the Gorenjska, Goriška Brda, Vipava River Valley, Coastal-Karst region, Central Slovenia, Kočevska region and Bela krajina, while in Bosnia and Herzegovina it is known only from south Herzegovina (Ljubuški, Čapljina, Mostar and Stolac areas). In Croatia, the species is present in several parts of the country, while in Sweden it occurs only in the southern and middle parts of the country (Skåne, Öland, Gotland, Göteborg and Gävle). Six new dragonfly host species and the northernmost occurrence of F. paludis are also reported.

Three butterfly species were recorded for the first time for the fauna of Bosnia and Herzegovina in the Herzegovina region: Danaus chrysippus, Cacyreus marshalli and Carcharodus orientalis. The records represent expansions to the known distribution, although the presence of all three species was expected as they are to be found in neighbouring countries. This is the third record that D. chrysippus has reached southern Croatia, and the first time it has been observed in Bosnia and Herzegovina. The record of the non-native C. marshalli fills the distributional gap, and the record of C. orientalis, a rare and local species in the region, represents an increase of the known distribution in the mainland of the western Adriatic coastline. In the future, additional records of rare and unrecorded species are expected in the country.

Ceratomegilla ( Adaliopsis ) alpina (Villa & Villa, 1835) is a Pleistocene glacial relict with disjunctive distribution in high mountain areas of the Alps, Carpathians and the Bulgarian mountains, where it inhabits mountain meadows from 800 to 2.000 m a.s.l. (Fürsch 1967, Haviar 2003, Kovar 2007). Two ssp. are recognized, Ceratomegilla alpina alpina Villa & Villa, 1835, restricted to the Alps (Austria, France, Italy, Liechtenstein and Switzerland), and Ceratomegilla alpina redtenbacheri Capra, 1928 with a wider distribution, including Austria, Bulgaria, Germany, Poland, Romania, Slovakia and Ukraina (Kovar 2007, Canepari 2013). In comparison with C. a. alpina , C. a. redtenbacheri is characterized by smaller humeral red spot reaching half of elytra width and without sub-humeral black spot; posterior spot roundish or square (never stripe shaped); body more convex and less pointed posteriorly (Capra 1928). Travnik C. a. Sampling site “Travnik

As a part of the 2nd European Congress on Odonatology (ECOO 2012), which was held in the beginning of July 2012 in Belgrade (Serbia), a post congress excursion to Bosnia and Herzegovina was organized. Between 6 and 12 August 2012, altogether 36 localities in three biogeographical regions throughout Bosnia and Herzegovina were surveyed, and 52 dragonfly species were found. This represents 83% of the hitherto recorded dragonfly species for the country. The most significant results are the second record and a new locality of Somatochlora metallica, second record of Coenagrion hastulatum, and first observation of the strong population of Lindenia tetraphylla for the country. New records of rare and/or threatened species, i.e. Coenagrion ornatum, Ceriagrion tenellum, Caliaeschna microstigma, Cordulegaster heros and Selysiothemis nigra, are also reported. The records of the most interesting species are briefly discussed from the aspects of biogeography and nature conservation.