Eosphaerophoria, Frey, 1946

Mengual, Ximo & Ghorpadé, Kumar, 2010, The flower fly genus Eosphaerophoria Frey (Diptera, Syrphidae), ZooKeys 33 (33), pp. 39-80 : 46-47

Key to species of Eosphaerophoria

1. Notopleuron with obtuse protuberance posterolaterally (Fig. 28)............... 4

– Notopleuron swollen but not produced posterolaterally (Fig. 29), or at least protuberance not as evident as in Figure 28 ............................................... 2

2. 2nd abdominal tergum black dorsally; 5th abdominal tergum with 2 lateral subtriangular yellow maculae (Fig. 38); scutum with lateral yellow vitta behind transverse suture narrower, with dorsal margin not in line with the dorsal margin of yellow notopleuron (Fig. 29) ( Malaysia) .............. brunettii

– 2nd abdominal tergum black with dorsomedial yellow macula; 5th abdominal tergum with yellow fascia (Figs 30, 31); scutum with lateral yellow vitta behind transverse suture with dorsal margin in line with the dorsal margin of yellow notopleuron (Fig. 28)...................................................................... 3

3. 1st abdominal tergum yellow with posterodistal narrow black fascia (Fig. 30); frons black with 2 basolateral yellow areas on ventral 3/4, about 1/3 of frons width each (Figs 26, 27) ( Nepal).................................................... punctata

– 1st abdominal tergum yellow with 2 subtriangular large black maculae on posterior margin (Fig. 31); frons yellow on ventral 4/5, black on dorsal 1/5 ( Vietnam) .................................................................................. symmetrica

4. Scutellum with rounded or pointed posterior margin, but without tooth on medial section (Figs 28, 29, 30) ................................................................. 7

– Scutellum with tooth on medial posterior margin (Fig. 4).......................... 5

5. 1st abdominal tergum yellow with posteromedial narrow black fascia (Fig. 32); face yellow with medial black vitta ( Indonesia, Halmahera Island) ....................................................................................................... hermosa

– 1st abdominal tergum black dorsomedially, yellow on anterior and lateral margins; face entirely yellow ...................................................................... 6

6. 2nd abdominal tergum black, yellow on anterobasal margins only (Fig. 33); 5th abdominal tergum with 2 small lateral yellow maculae (Fig. 33) ( Sri Lanka) ........................................................................................ dentiscutellata

– 2nd abdominal tergum black with basal yellow fascia with a posterior median triangular projection, narrowly separated from anterior margin by a black fascia (Fig. 34); 5th abdominal tergum with subbasal yellow fascia (Fig. 34) ( Papua New Guinea, Normanby Island) ....................................... adornata

7. 2nd abdominal tergum with yellow fascia on anterior 1/2, about 1/4 of tergum length (Fig. 35); 3rd and 4th abdominal terga with basal yellow fascia broader, about 1/2 of tergum length (Fig. 35); 5th abdominal tergum with anterior yellow fascia. Scutellum triangular with tip pointed, not rounded or produced into a tooth ( Papua New Guinea, New Ireland Island)............... luteofasciata

– 2nd abdominal tergum withour yellow fascia, entirely black dorsally or with central yellow macula; 3rd and 4th terga usually with narrower yellow fascia but variable................................................................................................ 8

8. 5th abdominal tergum with 2 lateral small yellowish maculae (Figs 39–43)..... 10

– 5th abdominal tergum black with anterior yellow fascia (Figs 36, 37) ........ 9

9. Face with a medial broad black vitta; 2nd tergum black dorsally, without central yellow macula (Fig. 36) ( Papua New Guinea, Indonesia – New Guinea island)....................................................................................... nigrovittata

– Face yellow (Fig. 24); 2nd tergum black dorsally with central elongated yellow macula (Fig. 37) ( Papua New Guinea).......................................... bifida

10. Frons yellow on basoventral 4/5 with very thin medial black vitta that may or may not reach antennal bases, black on dorsal 1/5 (Fig. 20). Face yellow. Notopleuron slightly produced posterolaterally (less evident than in Fig. 28) ( Vietnam, Malaysia)................................................................. vietnamensis

– Frons black, yellow on basolateral 2/3 with medial broad black vitta; at antennal bases, central black area is about 1/3–1/2 of the face width (Fig. 19). Male: face yellow. Female: face yellow with medial black vitta. Notopleuron clearly produced posterolaterally (Fig. 28) ( Philippines, Thailand) ............... ................................................................................................... marginata