Ectoparasite insects of bats from the fields and weedlands eco-region of Argentina Author Autino, Analía Gladys Author Idoeta, Fabricio Miguel Author Claps, Guillermo Luis Author Barquez, Rubén Marcos text Papéis Avulsos de Zoologia 2020 2020-12-11 60 1 9 http://dx.doi.org/10.11606/1807-0205/2020.60.64 journal article 10.11606/1807-0205/2020.60.64 1807-0205 4984041 Hesperoctenes vicinus Jordan , 1922 Hesperoctenes vicinus Jordan , 1922: 210-211 . Material examined: Misiones : Parque Provincial Cañadón de Profundidad, 27°33′S , 55°42′W , 03.iii.2010 , 1 ♀ ( CMLA 774) on Molossops temminckii ♀ ( FMI 182). Identification: This species is characterized by patches or rows of bristles on the medial posterior margin of the underside of the head. The gular crest is defined by an irregular double row of six to eight bristles on the middle of the hind margin. Antennal segments I and III are equal in length, and the labrum is proportionally three times wider than long. The bristles located on other parts of the body are sparse and distributed irregularly,including numerous bare areas on the pronotal disk.The species is similar to H. cartus , but has more bristles with the exception of the gular marginal row, which contains fewer bristles than in H. cartus , and the second antennal segment is shorter ( Jordan , 1922 ; Ronderos, 1962a , b). Comments: This species was previously known only from Paraguay ,reported on Molossus rufus (= M.ater ; Ueshima, 1972 ) and from Argentina on Molossops temminckii . Here its distribution in Argentina is extended quite far east, reaching the province of Misiones. Previously, it was known only from Jujuy and Salta on M. temminckii (Autino et al., 2009, 2016).