Trichotrombidium muscarum ( Riley, 1878 ),

Kontschán, Jenő & Hornok, Sándor, 2019, New records, a completed list and identification key of mites (Acari) associated with the stable fly, Stomoxys calcitrans (L.) (Diptera: Muscidae), Acarologia 59 (1), pp. 3-11: 7-8

publication ID 10.24349/acarologia/20194306


persistent identifier

treatment provided by


scientific name

Trichotrombidium muscarum ( Riley, 1878 )


Trichotrombidium muscarum ( Riley, 1878) 

Distinguishing characters of the larvae. Scutellum 3.5 times wider than long, wider than scutum. Scutum and scutellum with punctuation on central part and with longitudinal striae on lateral parts. Number of dorsal setae 28, setae AM smooth, other setae on dorsum slightly barbed, trichobothria narrow and very finely barbed ( Figure 2View Figure 2, C & D).

Notes. This species is the senior synonym of T. hemistriatum (Womerslay, 1942) ( Welbourn 1985)  and T. rafieiae Saboori, 2002  (Hakimtabar & Saboori 2018). Kobulej (1951) described a new species Trichotrombidium muscae Kobulej, 1951  , which is also a junior synonym of T. muscarum ( Riley, 1878)  . Saboori (2002) mentioned T. muscarum  in the key to Trichotrombidium  species as T. hemistriatum Kobulej, 1951  which is an erroneous name (maybe mixed names of the species of Womersay and Kobulej). The name T. muscarum  was also mentioned in Suhas and Rhao (1986) as ” Trichotrombidium muscarum Kolonev  ” (sic!), which is another misuse of this name.

This is a true parasitic species, known from Musca domestica  only from Iran ( Saboori 2002) and from Turkey ( Karakurt & Sevsay 2013), and from a species of the family Ulidiidae  ( Diptera  ) (Hakimtabar & Saboori 2018), but never mentioned from stable fly. McGarry et al. (1992) reported Trichotrombidium muscarum (Riley)  from flies from Libya and mentioned it from stable fly from Romania without citing references, so this association is questionable.

The rate of the infection

Only 5 stable flies were infested by mites from the collected 350 specimens. During our investigation of mites associated with stable flies only four mite species were collected. Two species were represented by only single specimens, namely the halolaelapid Halolaelaps sexclavatus  and the siteroptid Pediculaster mesembrinae  . The other two species were more abundant, one or two specimens of M. subbadius  were found on the venter of the body of the flies ( Figure 3View Figure 3). High numbers (8- 37 specimens) of T. muscarum  infested the flies (Figure 4) and these were found all over the body, adhering to the membranous cuticle between the tergites and sternites of abdomen and the parts of thorax.