Diagnosis. Male. In the group VII key of Borgmeier (1966), M. kelleri keys to M. rotundula Borgmeier, from which it differs by the lack of a hair at the base of the R vein (M. rotundula has a long, conspicuous hair) and having 3 notopleural setae (2 on M. rotundula).
Description. See Table 5.
Distribution. Los Angeles, California (USA).
Etymology. Named in honor of Eric Keller, host of BioSCAN site 28.
Biology. Unknown.
Holotype. ♂, USA: CALIFORNIA: Los Angeles, Carthay, 29.IV. 2014 – 6.V. 2014, Dahl, Malaise trap (LACM 329802).
Paratypes. ♂, USA: CALIFORNIA: Los Angeles, Eagle Rock, 3–10.V. 2014, Keller, Malaise trap (LACM 329803). 2 ♂, USA: CALIFORNIA: Los Angeles, Atwater Village, 30.IV. 2014 – 7.V. 2014, Higgins, Malaise trap (LACM 329804, CUMZ). ♂, USA: CALIFORNIA: Los Angeles, Los Feliz, 30.IV. 2014 – 7.V. 2014, Louie, Malaise trap (CUMZ).
Additional Material Examined. USA: CALIFORNIA: Los Angeles: Exposition Park, Los Feliz, Koreatown, Hollywood, Carthay, Atwater Village, Eagle Rock, 11 ♂, I–V. 2014, Malaise traps (LACM, MCZC, USNM).