Megistophylla

Li, Chun-Lin, Yang, Ping-Shih & Wang, Chuan-Chan, 2016, Two new species of Megistophylla Burmeister (Coleoptera: Scarabaeidae: Melolonthinae) from Taiwan, with notes on the genus, Zootaxa 4126 (2), pp. 240-250 : 242

Key to the species of Megistophylla using male specimens

1. Antennal club distinctly outwardly curved and longer than basal antennomeres; body length usually greater than 25 mm .... 2

-. Antennal club straight or slightly outwardly curved and length of antennal club subequal to basal antennomeres; body length usually less than 25 mm ................................................................................ 8

2. Antennal club composed of 8 antennomeres................................................................. 3

-. Antennal club less than 8 antennomeres................................................................... 4

3. Antennal club curved vertically at middle, apical basal antennomere enlarged, midline of frons flat............................................................................................ Megistophylla andrewesi Moser, 1913

-. Antennal club gradually curved outwardly, apical basal antennomere not enlarged, midline of frons raised.................................................................................. Megistophylla junghuhni Burmeister, 1855

4. Antennal club composed of 5 antennomeres, anterior margin of clypeus bow shaped................................ 5

-. Antennal club composed of 6 or 7 antennomeres, anterior margin of clypeus weakly bilobed..........................6

5. Antennal club curved vertically in apical half........................... Megistophylla grandicornis ( Fairmaire, 1891)

-. Antennal club gradually curved outwardly................................... Megistophylla pentaphylla Arrow, 1925

6. Antennal club composed of 7 antennomeres.................................... Megistophylla planiceps Arrow, 1941

-. Antennal club composed of 6 antennomeres................................................................. 7

7. Length of first antennomere of the antennal club less than half the length of the other antennomeres in the club,the fourth basal antennomere apically not enlarged........................................... Megistophylla indica ( Brenske, 1899)

-. Length of first antennomere of the antennal club longer than half the length of the other antennomeres in the club, the fourth basal antennomere apically enlarged........................................ Megistophylla dolichocera Arrow, 1925

8. Antennal club composed of 8 antennomeres................................................................. 9

-. Antennal club composed of 6 antennomeres................................................................ 10

9. Anterior margin of pronotum smooth, anterolateral angles not protuberant, lateral margins coarsely serrate...................................................................................... Megistophylla sumatrana Moser, 1913

-. Anterior margin of pronotum with anterolateral angles roundly protuberant, lateral margins finely serrate........................................................................................ Megistophylla punctata Arrow, 1938

10. Antennal club slightly curved outwardly, anterior margin of pronotum smooth, anterolateral angles not protuberant.............................................................................. Megistophylla heptophylla Moser, 1913

-. Antennal club straight, anterior margin of pronotum with anterolateral angles protuberant ( Figs. 3, 5 )..................11

11. Body color mainly rufotestaceous to dark reddish brown ( Fig. 1 ), punctures usually evenly and sparsely distributed along pro- notal midline ( Fig. 4 ), scutellum usually with more than 10 punctures ( Fig. 4 ), protarsomeres 2–3 ( Fig. 7 ) with dense setae aggregated at apices, apical upper margin of parameres distinctly swollen with tip broadly rounded ( Fig. 9 )........................................................................... Megistophylla formosana Wang & Li , new species

-. Body color black ( Fig. 2 ), punctures usually unevenly and sparsely distributed along pronotal midline ( Fig. 6 ), scutellum usu- ally impunctate or with less than 10 punctures ( Fig. 6 ), protarsomeres 2–3 ( Fig. 8 ) with setae sparsely distributed at apices; api- cal upper margin of parameres smooth with tip gradually narrowed apically ( Fig. 11 )................................................................................................. Megistophylla xitoui Li & Wang , new species

Figures

FIGURES 3 – 6. Close view of dorsum of male Megistophylla (3, 5 head and anterior half of pronotum; 4, 6 basal half of pronotum, scutellum. and elytra). 3 – 4. Megistophylla formosana new species; 5 – 6. Megistophylla xitoui new species.

FIGURES 1 – 2. Dorsal habitus of male Megistophylla. 1. Megistophylla formosana new species, holotype; 2. Megistophylla xitoui new species, holotype.

FIGURES 7 – 8. Ventral view of protarsomeres 2 – 3 of Megistophylla. 7. Megistophylla formosana new species; 8. Megistophylla xitoui new species.

FIGURES 9 – 12. Parameres of Megistophylla. (9, 11, lateral view; 10, 12, dorsal view). 9 – 10. Megistophylla formosana new species; 11 – 12. Megistophylla xitoui new species. Scale bar = 1.0 mm.