Chilosia bicolor Shannon & Aubertin, 1933: 141 Cheilosia bicolor Stuardo, 1946: 125 Cheilosia (Chromocheilosia) bicolor Hull & Fluke, 1950: 306 Milesiinae Updating the knowledge of the flower flies (Diptera: Syrphidae) from Chile: Illustrated catalog, extinction risk and biological notes Barahona-Segovia, Rodrigo M. Riera, Pamela Pañinao-Monsálvez, Laura Guzmán, Vicente Valdés Henríquez-Piskulich, Patricia Zootaxa 2021 2021-04-15 4959 1 1 178 5YHWK (Shannon & Aubertin, 1933) Shannon & Aubertin 1933 [151,813,1843,1870] Insecta Syrphidae Chromocheilosia Animalia Diptera 13 14 Arthropoda species bicolor   Fig. 1      Chilosia bicolor Shannon & Aubertin, 1933: 141     Cheilosia bicolor Stuardo, 1946: 125*    Cheilosia (Chromocheilosia)  bicolor Hull & Fluke, 1950: 306*     Typelocality and data.“ Casa Pangue, Chile” (T, ♂, BMNH).  Literature distribution.  Los Lagos: 1♀, Casa Pangue, Llanquihue, -41.0668, -71.8885,  XII.1926, Leg. R.& E. Shannon ( USNM).   References. Shannon & Aubertin, 1933: 141, fig. 27a (male, face, lateral), b (female, face, lateral) (desc. & key); Stuardo, 1946: 125(cat); Hull & Fluke, 1950: 306(rev.); Fluke, 1957: 44(cat.); Thompson, 1972b: 121, fig. 10 (male), 11 (female) ( Milesiinaerev., desc.); Thompson et al., 1976: 46.90 (cat.); Thompson, 1999a: 333(key).  World distribution. Chile.  Chilean distribution.Only known from Los Lagos region( Fig. 10).  Altitudinal range.This species inhabits precordillera ecosystems between 1000 and 1500 m.a.s.l.   Biology and notes.All aspects of its biology and ecology remain unknown.  Conservation status.DD; AOO = 2 km 2and one locality (or subpopulation). 3080454312 [151,851,150,177] BMNH Chile Casa Pangue 14 15 1 1 holotype 3080454975 1926-12 USNM Leg. R. -41.0668 Llanquihue 6 -71.8885 Casa Pangue 14 15 1 1 Los Lagos