Methochinae (Rohwer, 1916)

Narita, Keisuke & Mita, Toshiharu, 2021, A review of the subfamily Methochinae from Taiwan (Hymenoptera: Tiphiidae) with description of a new species and redescription of the known species, Zootaxa 4964 (2), pp. 303-329 : 304-305

Key to the species of Methochinae from Taiwan

1 Alate (males)........................................................................................ 2

- Apterous (females).................................................................................... 9

2 Antennal lobe developed; flagellum inconspiciously flattened; maximum length of dorsal pronotal disc shorter than its width (genus Methocha Latreille, 1804 )......................................................................... 3

- Antennal lobe inconspicuous; flagellum strongly flattened; maximum length of dorsal pronotal disc equal to or longer than its width (genus Karlissa Krombein, 1979 ).................................. Karlissa tricha ( Strand, 1913) , comb. nov.

3 Clypeus bilobate ( Fig 112 ); mesepisternum foveolate ( Fig 111 )............................ M. taiwanica Tsuneki, 1986

- Clypeus not bilobate ( Fig 4 ); mesepisternum not foveolate ( Fig 3 )............................................... 4

4 Clypeus distally translucent ( Fig 62 )...................................................................... 5

- Clypeus distally opaque ( Fig 4 ).......................................................................... 6

5 Tarsal claws with subapical tooth shorter than half of apical tooth ( Fig 65 ); propodeum areolate ( Fig 64 )................................................................................................. M. foveiventris Lin, 1966

- Tarsal claws with subapical tooth almost as long as apical tooth ( Fig 83 ); propodeum transversely costate ( Fig 82 ).............................................................................................. M. maai Lin, 1966

6 Mandible distally not narrowed ( Fig 4 ).................................................................... 7

- Mandible narrowed in distal half or third ( Fig 26 )............................................................ 8

7 Propodeum dorsally areolate, with smooth interspaces ( Fig 17 )................................ M. areolata Lin, 1966

- Propodeum dorsally rugose longitudinally, with granulate interspaces ( Fig 39 ).................... M. cirrhocrus sp. nov.

8 Propodeum dorsally clearly areolate ( Fig 28 ).............................................. M. cavipyga Lin, 1966

- Propodeum dorsally finely areolate or areolae absent ( Fig 6 ).................................. M. alutacea Lin, 1966

9 All tarsal claws with subapical tooth equal to or longer than apical tooth ( Fig 94 ).................................. 10

- All tarsal claws with subapical tooth shorter than apical tooth ( Fig 51 ).......................................... 11

10 Gena narrowed ventrally ( Fig 93 ); mesosoma entirely black ( Figs 88, 89 )........................... M. maai Lin, 1966

- Gena not narrowed ( Fig 100 ); mesosoma dark reddish brown ( Figs 95, 96 ).......................... M. plana Lin, 1966

11 Frons impunctate or punctate ( Fig 49 ).................................................................... 12

- Frons rugose; distal two-thirds of clypeus rugulose ( Fig 74 )................................. M. foveiventris Lin, 1966

12 Frontal tubercles absent ( Fig 49 )........................................................................ 13

- Pair of frontal tubercles present ( Figs 106, 107 )........................................... M. priorrecta Lin, 1966

13 Clypeal apex incurved ( Fig 49 )....................................................... M. emarginata Lin, 1966

- Clypeal apex truncate ( Fig 56 ).................................................... M. formosana Williams, 1919

Figures

FIGURES 112–116. Methocha taiwanica Tsuneki, 1986, holotype, male. 112 Head, frontal view, 113 head, lateral view, 114 propodeum, 115 hind tarsal claw, 116 T1, dorsal view. Scale bars are given in mm.

FIGURES 109–111. Methocha taiwanica Tsuneki, 1986, holotype, male. 109 Dorsal habitus, 110 lateral habitus, 111 mesosoma, dorsal view, the arrow indicating the fovea.

FIGURES 4–11. Methocha alutacea Lin, 1966, individual, male. 4 Head, frontal view, 5 head, lateral view, 6 propodeum, 7 hind tarsal claw, 8 T1, dorsal view, 9 right paramere, lateral view (right side is dorsal), 10 aedeagus, dorsal view, arrow indicating median membranous lobe, 11 aedeagus, lateral view. Scale bars are given in mm.

FIGURES 1–3. Methocha alutacea Lin, 1966, individual, male. 1 Dorsal habitus, 2 lateral habitus, 3 mesosoma, lateral view.

FIGURES 62–69. Methocha foveiventris Lin, 1966, individual, male. 62 Head, frontal view, the arrow indicating the translucent part, 63 head, lateral view, 64 propodeum, 65 hind tarsal claw, 66 T1, dorsal view, 67 right paramere, lateral view (right side is dorsal), 68 aedeagus, dorsal view, arrow indicating median membranous lobe, 69 aedeagus, lateral view. Scale bars are given in mm.

FIGURES 80–87. Methocha maai Lin, 1966, individual, male. 80 Head, frontal view, 81 head, lateral view, 82 propodeum, 83 hind tarsal claw, 84 T1, dorsal view, 85 right paramere, lateral view (right side is dorsal), 86 aedeagus, dorsal view, arrow indicating median membranous lobe, 87 aedeagus, lateral view. Scale bars are given in mm.

FIGURES 26–33. Methocha cavipyga Lin, 1966, individual, male. 26 Head, frontal view, 27 head, lateral view, 28 propodeum, 29 hind tarsal claw, 30 T1, dorsal view, 31 right paramere, lateral view (right side is dorsal), 32 aedeagus, dorsal view, arrow indicating median membranous lobe, 33 aedeagus, lateral view. Scale bars are given in mm.

FIGURES 15–22. Methocha areolata Lin, 1966, individual, male. 15 Head, frontal view, 16 head, lateral view, 17 propodeum, 18 hind tarsal claw, 19 T1, dorsal view, 20 right paramere, lateral view (right side is dorsal), 21 aedeagus, dorsal view, arrow indicating median membranous lobe, 22 aedeagus, lateral view. Scale bars are given in mm.

FIGURES 37–44. Methocha cirrhocrus sp. nov., holotype, male. 37 Head, frontal view, 38 head, lateral view, 39 propodeum, 40 hind tarsal claw, 41 T1, dorsal view, 42 right paramere, lateral view (right side is dorsal), 43 aedeagus, dorsal view, arrow indicating median membranous lobe, 44 aedeagus, lateral view. Scale bars are given in mm.

FIGURES 92–94. Methocha maai Lin, 1966, individual, female. 92 Head, frontal view, 93 head, lateral view, 94 hind tarsal claw. Scale bars are given in mm.

FIGURES 49–51. Methocha emarginata Lin, 1966, individual, female. 49 Head, frontal view, 50 head, lateral view, 51 hind tarsal claw. Scale bars are given in mm.

FIGURES 88–91. Methocha maai Lin, 1966, individual, female. 88 Dorsal habitus, 89 lateral habitus, 90 mesosoma, dorsal view, 91 mesosoma, lateral view.

FIGURES 99–101. Methocha plana Lin, 1966, holotype, female. 99 Head, frontal view, 100 head, lateral view, 101 hind tarsal claw. Scale bars are given in mm.

FIGURES 95–98. Methocha plana Lin, 1966, holotype, female. 95 Dorsal habitus, 96 lateral habitus, 97 mesosoma, dorsal view, 98 mesosoma, lateral view.

FIGURES 74–76. Methocha foveiventris Lin, 1966, holotype, female. 74 Head, frontal view, 75 head, lateral view, 76 hind tarsal claw. Scale bars are given in mm.

FIGURES 106–108. Methocha priorrecta Lin, 1966, individual, female. 106 Head, frontal view, 107 head, lateral view, 108 hind tarsal claw. Scale bars are given in mm.

FIGURES 56–58. Methocha formosana Williams, 1919, individual, female. 56 Head, frontal view, 57 head, lateral view, 58 hind tarsal claw. Scale bars are given in mm.