E. blanchardi (Aczél)

Eoneria Aczél

Diagnosis

Anterior margin of frons straight. Body setae longer than those of other neotropical Neriidae and not spine-like. Head elongate, twice as long as antennae. Antennal base longer than wide; covered with a dense yellow dusting and consequently only sub-shiny. First flagellomere testaceous in color, covered with tiny white pilosity; posterior margin ovate. Arista brown and micropilose on the dorso-apical margin of the first flagellomere. Vibrissa present. Thorax with one dorsal gray pruinose vitta equal in width with scutellum, separated by a narrow, median, yellowish brown stripe; pleuron covered with gray pruinescence. Six pairs of dorsocentral setae, variable in size. Mid and hind coxae with two lateral setae. Basal portion of the costa with one dorsal seta and one ventral seta. Tergite 2 with one lateral seta, subequal to anterior notopleural setae and two conspicuous setae on posterior margin.

Species accounts

1. Eoneria aczeli Sepúlveda & Carvalho, 2013

2. Eoneria blanchardi Aczél, 1951

3. Eoneria maldonadoi Aczél, 1961

4. Eoneria sabroskyi (Aczél, 1961)

Key to species of Eoneria

1 Tegument densely pruinose with numerous setulae inserted in brown maculae, giving the appearence of a brown dotted body (Fig. 1); arista white (Fig. 1, black arrow) ... E. sabroskyi

1' Tegument without setulae inserted in brown maculae (Fig. 2);

arista brown (Fig. 2, black arrow) ... 2

2 Distal margin of antennal base bare, without black setulae. Fore femur yellowish brown with several anteroventral and posteroventral spine-like setae, stronger on the distal half. Frontal vitta mainly ochraceous pruinose; with one yellowish brown pruinose stripe from anterior margin of frons to ocellar tubercle ... 3

2' Distal margin of antennal base with two or three conspicuous black setulae. Fore femur yellowish pruinose, with inconspicuous anteroventral and posteroventral spine-like setae. Frontal vitta completely yellow pruinose ... E. aczeli

3 Wing veins R2+3 and M1 with 10 and 8 intercalated cross-veins respectively, one cross-vein emerging from Costa between apices of veins R2+3 and R4+5 (Fig. 3). Frontal vitta ochraceous pruinose, with a wide yellowish brown pruinose stripe from anterior margin offronstoocellartubercle ... E. maldonadoi

3' Wing without supernumerary cross-veins (Fig. 4). Frontal vitta ochraceous pruinose, except for two lateral yellowish brown pruinose stripes “Y” shaped from the anterior margin of frons to converge in front of the ocellar tubercle ... E. blanchardi

Know the species of Eoneria

Sepúlveda & Carvalho, 2013

E. aczeli

Relatively small compared to congeners. Body yellowish-brown, covered by dense white pruinescence. Head. Frontal vitta yellow and pruinose. Three pairs of well-developed fronto-orbital setae, the anterior pair is weaker. Antennal base yellowish brown, with two or three small black setulae ventrally. Thorax. Fore femur yellowish pruinose, with several anteroventral and posteroventral short spine-like setae.

Aczél, 1951

E. blanchardi

Head. Antennal base yellowish-brown and opaque; longer than wide in dorsal view. Antenna half of the head length. Scape testaceous yellow, darkened on lateral margin. Inner process of pedicel triangular and narrow. First flagellomere ovate with dorso-apical arista. Arista brown and micropubescent. Three fronto-orbital setae. Frontal vitta mostly yellow, except for two lateral brownish stripes 'Y-shaped' from anterior margin of frons to ocellar triangle. Postgena with dense patch of yellow setulae. Occiput with very short setulae toward posterior margin of head. Thorax. Brown, covered by dense grey pruinescence dorsally, divided medially by one narrow dark brown stripe. Pleuron dorsally with yellow stripe at postpronotal lobe and notopleuron toward alar base. Two dorsocentral presutural setae tiny and four postsutural increasing in size toward scutellum. Wing without supernumerary cross-veins.

Aczél, 1961

E. maldonadoi

Head. Antennal base yellowish-brown and opaque; longer than wide in dorsal view. Antenna half of the head length. Scape testaceous yellow, darkened on lateral margin. Inner process of pedicel triangular and narrow. First flagellomere ovate, slightly constricted on distal third. Arista dorso-apical, brown and micropubescent. Three fronto-orbital setae. Frontal vitta brownish-yellow. Postgena with dense patch of yellow setulae. Occiput with very short setulae toward posterior margin of head. Thorax. Pale brown, covered by dense grey pruinescence dorsally, divided medially by one narrow brown stripe. Pleuron dorsally with yellow stripe at postpronotal lobe and notopleuron toward alar base. Two dorsocentral presutural setae tiny and four postsutural increasing in size toward scutellum. Wing with supernumerary cross-veins.

Aczél, 1961

E. sabroskyi

Brown with yellow legs and almost completely covered by grey pruinescence, except in face, gena, three brown dorsal longitudinal stripes on thorax and two dorsal longitudinal brown stripes on abdomen. Setulae inserted in brown maculae, giving the appearance of a dotted body. Body setae not spine-like. Head. Arista dorso-apical bare and white. First flagellomere rectangular and short. Thorax. Proepisternal plate ventrally yellow and dorsally brown; with one ventral hair-like seta. Fore coxa with two antero-apical setae and three anterolateral setae slender. Right mid coxa with three and left mid coxa with two lateral setae. Hind coxa with two lateral setae. Abdomen. Syntergite 1+2 densely setose with outstanding lateral seta and 3−4 more marginal setae. Tergites brown with dense grey pruinescence.

References

Sepúlveda, T. A., Wolff, M. I. & de Carvalho, C. J. B. 2013. Revision of the Neotropical genus Eoneria Aczél (Diptera: Neriidae) with description of a new species from Colombia. Zootaxa 3636 (2): 245–256. Available here.

Sepúlveda, T. A. & Souza, D. S. 2019. Taxonomy and phylogeny of the Eoneria-group (Diptera, Neriidae). Insect Systematics & Evolution 1–35. Available here.