Eosphaerophoria, Frey, 1946

Mengual, Ximo & Ghorpadé, Kumar, 2010, The flower fly genus Eosphaerophoria Frey (Diptera, Syrphidae), ZooKeys 33 (33), pp. 39-80 : 44-45

Key to Eosphaerophoria and related genera

1. Metasternum pilose.................................................................................... 7

– Metasternum bare...................................................................................... 2

2. Scutum with lateral yellow interrupted, black after transverse suture.......... 5

– Scutum yellow laterally after transverse suture............................................ 3

3. Plumula present (Fig. 1). Face broad, about 1/2 as wide as head measured at antennal base level, always more than 1/3 (Fig. 2). Male holoptic ................ ............................................................................................... Citrogramma Vockeroth, 1969: 92 . Type-species, Syrphus hervebazini Curran, 1928 , original designation

– Plumula absent (Fig. 3). Face narrower, at most 1/3 as wide as head (Figs 19, 20, 27). Male dichoptic ............................................................................. 4

4. Scutellum subtriangular, its apex subacute or with pointed tubercle; yellow with basomedial black triangle (Fig. 4). Vein M 1 nearly perpendicular to R 4+5, straight or nearly so (Figs 22, 23). Pleura entirely yellow, except meron black and katepimeron black ventrally (Fig. 7). Metafemur yellow on basal 1/2 to 3/5, black apically (Fig. 7)................................................. Eosphaerophoria Frey, 1946: 169 . Type-species, Eosphaerophoria marginata Frey, 1946 original designation

– Scutellum with posterior margin rounded, yellowish (Fig. 5). Vein M 1 sinuate (Fig. 8). Pleura completely yellow (Fig. 9). Metafemur entirely yellow (Fig. 9) ( New Zealand)...................................................... Allograpta [ A. ventralis ] (Miller, 1921). Originally described as Ocyptamus ventralis Miller, 1921

5. Scutellum concave apicomedially with subscutellum greatly produced so as to be visible dorsally (Figs 6, 10). Face straight, with tubercle (Fig. 10); alula broader than second costal cell. Male terga reduced apicomedially so that the abdomen may be bent into an apicodorsal curve (almost always in dead specimens) (Fig. 10) ( New Zealand) ...................................................... Anu Thompson, 2008: 9 . Type-species, Anu una Thompson, 2008 original designation

– Scutellum with posterior margin rounded, subscutellum normal. Face produced anteriorly (Figs 11, 14); alula as broad as or narrower than second costal cell (Fig. 13). Male abdomen without those characters ..................... 6

6. Costa with strong black swelling at extreme base (Fig. 13). Face with medial tubercle (11). Male broadly dichoptic, separated by more than ocellar triangle width (Fig. 12). Wing completely microtrichose (New Guinea)...... Giluwea Vockeroth, 1969: 136 . Type-species, Giluwea flavomaculata Vockeroth, 1969 original designation

– Costa normal, without swelling. Facial tubercle absent (Fig. 14). Male narrowly dichoptic, separated by ocellar triangle width or less (Fig. 15). Wing microtrichose, bare basomedially ( Sri Lanka, Southern India) ........... ............................................................................................. Rhinobaccha de Meijere, 1908: 315 . Type-species, Rhinobaccha gracilis de Meijere, 1908 monotypy

7. Abdomen distinctly margined on at least tergite 4; usually oval, broader than thorax. Scutum usually black, pollinose with medial section with bluish metallic iridescence ................................................................. Citrogramma Vockeroth, 1969: 92 . Type-species, Syrphus hervebazini Curran, 1928 original designation

– Abdomen unmargined; elongate with parallel sides (as wide as thorax) or petiolate. Scutum black, normally shiny..................................................... 8

8 Subscutellar fringe usually entire, sometimes sparse but complete. Male genitalia: superior lobe fused basally with hypandrium (Fig. 16).... Allograpta Osten Sacken, 1875: 49 , 63. Type species, Scaeva obliqua Say, 1823 original designation

– Subscutellar fringe completely absent or with pile restricted laterally, with median section bare. Male genitalia: superior lobe free and articulated with hypandrium; basal aedeagus simple, not swollen nor with denticules ......... 9

9. 5th abdominal tergum narrow, about two times as broad as long. Male genitalia small, with epandrium half as wide as abdomen or less (Fig. 17). Pleura black dorsad procoxa. Notopleuron mostly black, yellow on anterior 1/2 (Afrotropical)....................................................................... Exallandra Vockeroth, 1969: 87 . Type-species, Syrphus cinctifacies Speiser, 1910 original designation