The bees of Michigan (Hymenoptera: Apoidea: Anthophila), with notes on distribution, taxonomy, pollination, and natural history Author Gibbs, Jason Author Ascher, John S. Author Rightmyer, Molly G. Author Isaacs, Rufus text Zootaxa 2017 2017-11-21 4352 1 1 160 journal article 31367 10.11646/zootaxa.4352.1.1 543c4afc-4ffb-4e11-a858-a6d1d9745214 1175-5326 1063854 7C684128-FFA7-48AA-B395-B9C6BC39353A Megachile ( Eutricharaea ) apicalis Spinola 1808 (New state record) ( Fig. 19A ) County records: Ingham. Notes. A single female specimen was collected adjacent to a railway line in 2013. After repeated attempts to recollect the species at the same locality, an additional female and male were found in 2014. Megachile apicalis prefers Centaurea (Asteraceae) ( Müller & Bansac 2004 ), which was abundant at the collection site. The female of the species is similar to the alfalfa leafcutter bee, M . rotundata , but can be distinguished by the apical projection of the clypeus and the darker scopal hairs on S 4 in addition to S5 ( Parker 1978 ; Sheffield et al. 2011b ). Megachile rotundata is commonly observed in the same area. A continuing expansion of its range is likely, similar to that seen in other cavity nesting megachilid bees ( Gibbs & Sheffield 2009 ; Hinojosa-Díaz 2008 ). In other US localities, this species can be very abundant and aggressively competes for nesting sites ( Barthell & Thorp 1995 ; Stephen 2003 ; Thorp 1996 ). Further range extensions of this species might be facilitated by the spread of the invasive plant Centaurea stoebe L. (Spotted Knapweed) ( Richardson et al. 2000 ). Material examined. Ingham Co . : Michigan State University, south campus, N42.721 W84.473 , 9 Jun. 2013 ( 1 ♀ MSUC ) ; Michigan State University, south campus, N42.721 W84.473 , 23 Aug. 2014 ( 1 ♀ 1 ♂ JBWM ) .