Colletes caspicus MORAWITZ, 1873

Colletes caspicus MORAWITZ, 1873 View in CoL

Of all the species treated here, C. caspicus has the widest distribution, from Germany to the western parts of East Asia in Russia and China ( PROSHCHALYKIN & KUHLMANN 2023). In the East Asian part of Russia C. caspicus is only known from the west of East Siberia. Easternmost records are from Krasnoyarsk Territory, Khakassia Republic and Tyva Republic ( KUHLMANN & PROSHCHALYKIN 2011, PROSHCHALYKIN & KUHLMANN 2015, PROSHCHALYKIN & KUHLMANN 2023). The species is not mentioned for China by NIU et al. (2014). However, without any further details it is listed for China in PROSHCHALYKIN & KUHLMANN (2023). The latter information is based on unpublished records of 2 males collected 3-4. June and 8-9. June 1908 by P. Kozlov in " Dyn-yuan’- in, N Alashan " (Coll. Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia). According to PROSHCHALYKIN & DATHE (2018), this site is located at N39º40' E106º20' in present-day Inner Mongolia, making it by far the easternmost locality of C. caspicus .

In East Asia specimens were found from late May to August ( NOSKIEWICZ 1936, PROSHCHALYKIN & KUHLMANN 2015, PROSHCHALYKIN & KUHLMANN 2023). According to MÜLLER & KUHLMANN (2008) C. caspicus is, based on four pollen loads from three different sites, polylectic with a strong preference for Fabaceae . No information is available on its nesting biology.