Epeolus tarsalis, Morawitz. In, 1874

Astafurova, Yulia V. & Proshchalykin, Maxim Yu., 2021, Review of the Epeolus tarsalis species group (Hymenoptera: Apidae, Epeolus Latreille, 1802), with description of a new species, Zootaxa 5006 (1), pp. 26-36 : 34

Key to the species of the E. tarsalis species group

Females

1. Apical band on T2 uninterrupted or medially narrowly interrupted; apical band on T3 uninterrupted.................... 2

– Apical bands on T2 and T3 widely interrupted medially (on T3 often reduced to two small lateral spots)................ 4

2. T1 with basal band widely connected laterally with apical band; labrum straight or slightly curved on apical margin with weak medial tooth, pair of teeth positioned sub-apically........................................................... 3

– T1 only with apical band; labrum distinctly curved on apical margin with distinct medial tooth, pair of closely spaced teeth positioned rather medially.......................................................... E. coreanus Yasumatsu

3. Apical band on T1 uninterrupted; labrum slightly curved on apical margin; clypeus flat............. E. mikhailovi sp. nov.

– Apical apical band on T1widely interrupted; labrum straight on apical margin; clypeus convex.... E. ladakhensis Bogusch

4. Supraclypeal elevation curved laterally (as seen in frontal view), with lateral lobes clearly extending over antennal sockets ( Fig. 2 ). Mesepisternum usually entirely black, rarely red on upper half.............................. E. tarsalis Morawitz

– Supraclypeal elevation straight laterally (as seen in frontal view), with lateral lobes slightly extending over antennal sockets ( Fig. 1 ). Mesepisternum black or red............................................. .. E. melectiformis Yasumatsu

Figures

FIGURES 1–7. Epeolus melectiformis Yasumatsu, female (1), E. tarsalis Morawitz, female (2, 4, 5); male (6, 7), E. coreanus Yasumatsu, male (3): 1–3—supraclypeal area, frontal, view, 4, 5—hind femora, lateral view; 6, 7—metasoma, dorso-lateral view. Scale bars: 0.3 mm (1–3); 0.5 mm (4–7).