Liparus (Liparus) glabrirostris Küst. AND Hylobius (Callirus) abietis (L.) (COLEOPTERA: CURCULIONIDAE) FIRST RECORDS FOR SERBIA

This paper presents a survey of data on two weevil species not recorded for the fauna of Serbia till now. Despite their large size, Liparus (Liparus) glabrirostris Küster, 1849 and Hylobius (Callirus) abietis (Linnaeus, 1758) have not been recorded for Serbia in the newest Palaearctic weevil catalogue (ALONSO-ZARAZAGA et al., 2017) or in the Fauna Europaea (ALONSO-ZARAZAGA et al., 2013, https://fauna-eu.org/). In this paper L. glabrirostris, found in a single locality on Mt Goč, is registered as the third representative of the genus Liparus Olivier, 1807 in Serbia. Hylobius abietis is a serious, widely distributed conifer pest, but was not faunistically registered for Serbia till now. Some ecological data and distribution maps with Serbian locations are given for both species.


INTRODUCTION
Entomological collections are important sources of information and very often sources of interesting discoveries, like the two in this paper. Comparison of different findings, i.e., personal weevil collection, and one old, student's entomological collection, with literature sources about the weevil fauna registered so far in Serbia (ALONSO-ZARAZAGA et al., 2017) gave a chance to write this paper about Serbian findings of two weevil species, characterized by large bodies − Liparus (Liparus) glabrirostris Küster, 1849 and Hylobius (Callirus) abietis (Linnaeus, 1758).
Although one of the largest European weevils (with body up to 19 mm long), L. glabrirostris has not been recorded for Serbia so far. It is not listed for our country either in the Fauna Europaea database (ALONSO-ZARAZAGA et al., 2013, https://fauna-eu.org/), or in the latest Catalogue of Palaearctic weevils (ALONSO-ZARAZAGA et al., 2017). This is also true for H. abietis (Linnaeus, 1758), a well-known and widely distributed forest pest.
In this paper data on findings of these species with ecological notes for both are given.

MATERIAL AND METHODS
Very different entomological field surveys conducted throughout entire Serbia from 1995 onwards by Vesna Stojanović, Ivo Karaman, Nastas Ilić, Snežana Pešić, Dejan Stojanović, Ivan Tot and Mihailo Vujić resulted in the collection of 31 weevil specimens on which this text is based.
Specimens collected by Nastas Ilić (Tab. 1) were in pit-fall traps with 9% alcoholic vinegar aromatized with rum extract as an attractant, while all other beetles were collected manually or, more rarely, by the classic entomological net.
For the identification of beetles, a series of keys was used: The data presented in this paper concern two male specimens. One comes from the insectarium of a? student Vesna Stojanović and was collected on 01.06.1997 on Goč Mt. in Central Serbia (Fig. 2), situated in the northern part of Kopaonik's branch of the Dinaric Alps. Due to doubts about the reliability of the label data, this finding has not been published till now 1    Although these are large insects and presumably easy for identification, the genitalia were extracted from both specimens (Fig. 3).
In   A short key for distinguishing Liparus species registered in Serbia 1 (4) Inner margin of fore tibia with small pointed or notched teeth. 2 (3) Femora strongly toothed. Antennal funicle robust; segments 3-6 wider than long. Pronotum finely and densely punctate, with basal edge curved, and yellow striped with hairlike scales. Two spots of yellow scales on the sides of the pronotum. Elytra slightly shiny, scal-like sculptured, with isolated small yellow spots. Body length 8.5-13 mm.   1948). GBIF has 9,878 georeferenced records of H. abietis collected from 1800 till 2020 (GBIF SECRETARIAT, 2019b; Fig. 3). This pest is also considered as invasive and included into the list of Centre for Agriculture and Bioscience International, but again, Serbia is not mentioned there (https://www.cabi.org/ISC/abstract/20066600643).
Except for the large pine weevil, one more species of the same subgenus has been recorded in Serbia earlier − Hylobius (Callirus) transversovittatus Goeze, 1777 (PEŠIĆ, 2014).  A short key for distinguishing Hylobius species registered in Serbia 1 (2) Scutellum with noticeable yellow hairlike scales. Striae of punctures at bases of elytra as wide as interstriae or, in places, even wider. Granulation of elytra gradually disappears toward apices of the latter. Antennal funicle thin − 2nd segment as long as 1st, 7th segment not more than 1.5× as wide as long. Body and legs rust-red to red-brown. Elytra appearing quite bald and slightly shiny, with a few spots or bandages of yellow hairlike scales. Pronotum densely and very coarsely punctate (almost foveate). Body length 7.5-11 mm. Common around conifers, often at night. transversovittatus 2 (1) Scutellum only inconspicuously hairy. Elytral striae at base narrower than interstriae.
Granulation of elytra becoming finer toward their apices, but still well distinct. 7th segment of antennal funicle twice as wide as long. Body and legs dark brown to almost black. Hairs often interspersed, especially on pronotum and elytral base, with yellowish hairlike scales. Elytra less shiny, rather matt, with more spots or bands of yellow hairlike scales. Pronotum densely, but less coarsely punctate. Body length 7.5-13 mm. In peaty wetlands. abietis 163 Obviously, without well collected and preserved material, a lot of faunistic data will be irretrievably lost to science. It is particularly important in the countries like Serbia, where nature is rich, while entomological collections, private or institutional, are very few. Such lack leads to potential loss of understanding of Serbian biodiversity and the possibility to conserve and manage this. Except it, thanks to the collections performing many kinds of taxonomic research is enabled.