Eumerus strigatus ( Fallén, 1817 )

Barahona-Segovia, Rodrigo M., Riera, Pamela, Pañinao-Monsálvez, Laura, Guzmán, Vicente Valdés & Henríquez-Piskulich, Patricia, 2021, Updating the knowledge of the flower flies (Diptera: Syrphidae) from Chile: Illustrated catalog, extinction risk and biological notes, Zootaxa 4959 (1), pp. 1-178 : 53-54

Eumerus strigatus ( Fallén, 1817)

Figs 68–69

Pipiza strigata Fallén, 1817: 61

Eumerus aeneus Macquart, 1829: 269

Eumerus funeralis Meigen, 1822: 208

Type locality and data. “ Sweden, Vestrogothia & Scania ” (ST, A, NHRS) .

Material examined. Metropolitana: 2♀, 4km south Colina, 28.X.1986. Leg. J. Apablaza ( SAG); O’Higgins: 1♀, Rancagua, 02.XI.1938, Leg. P. Gómez ( SAG) ; Maule: 3♂, 5♀, Chovellén, II.2018, Leg. Jorge Zamorano ( LEAF) ; Biobío: 1♂, Mulchen, no data, Leg. SAG ( SAG) ; La Araucanía: 1♀, Pino Hachado, 07.II.2000, Leg. SAG ( SAG) ; 1♂, Carillanca, Temuco , 10.VII.1987, Leg. E. Prado ( SAG) ; Aysén: 1♀, Chile Chico , 1–11.II.1983, Leg. D. Rodríguez ( UACH) .

References. Gerding et al., 1999: 1 (natural history).

World distribution. Originally from Europe, the species was introduced to North America, Australia, New Zealand and Chile.

Chilean distribution. From Metropolitan to Aysén region ( Fig. 70 ).

Altitudinal range. From inland valleys to precordillera ecosystems (100– 1,800 m.a.s.l.).

Biology and notes. Eumerus strigatus is an exotic species considered a pest of onion and garlic crops. Later, the first record in Chile was reported in 1978 by Vockeroth with samples reared by SAG ( Gerding et al., 1999). The larva penetrates the bulbs, turning the tissue into a pulpy texture. Adults are considered important pollinators of hyacinth, potatoes, carrots, and strawberries.

Conservation status. Not evaluated because this species is considered exotic.

Figures

FIGURE 70. Distribution map of Cepa simonettii Barahona-Segovia, 2019 (yellow circles); Eumerus strigatus (Fallén, 1817) (blue circles), and Macrometopia atra Philippi, 1865 (red circles) in Chile.

FIGURES 66–69. Cepa simonettii Barahona-Segovia, 2019: (66) female, lateral view; (67) female dorsal view (photos by Matías Barceló). Scale bars = 1 mm. Eumerus strigatus (Fallén, 1817): (68) visiting a Convolvulus sp., Quino, La Araucanía (photo by Miguel Mellado); (69) visiting a Raphanus raphanistrum L., Quino, La Araucanía (photo by Miguel Mellado)