Malaxa, Melichar, 1914

Bartlett, Charles R. & Kennedy, Ashley C., 2018, A review of New World Malaxa (Hemiptera: Fulgoroidea: Delphacidae), Zootaxa 4441 (3), pp. 511-528 : 513

Key to genus for Malaxa and related groups examined in this work (males)

1. Forewings apically pointed ( Figs. 2 , 35 ), arched on leading margin (giving wings a spatulate appearance); anal tube of male simple (not bearing processes; Fig. 5 ) and opening of male pygofer without processes; recorded from Philippines............................................................................................... Malaxa acutipennis

1’- Forewings apically rounded ( Figs. 36–37 ), leading margin straight; anal tube of male either simple (e.g., Fig. 14 ) or with 1–2 processes; opening of pygofer with processes of varying sorts (e.g., Figs. 13 , 25, 27 )............................... 2

2. Anal tube with 1–2 processes; opening of pygofer usually bearing two broad lamellate medioventral processes, between them a V-like emargination; recorded from China.......................................... Malaxa sensu Hou et al. 2013

2’- Anal tube simple ( Fig. 14 ); opening of pygofer either with a small midventral forked process ( Figs. 13 , 25 , 41 ), or a broad, scoop-like projection plus a pair of lateral teeth ( Fig. 27 ); Neotropical........................................... 3

3. Antennae very long (exceeding mesonotum), segment I several times as long as broad ( Figs. 10, 12 ); pygofer bearing a midventral forked process ( Figs. 13 , 25 , 41 ); aedeagus caudally directed bearing poorly sclerotized terminal process ( Figs. 26 , 38 ); hind leg spinulation 5-7-5 or 5-6-5............................................................. Lamaxa n. g.

3’- Antennae shorter, not exceeding mesonotum, segment I about 2x as long as wide and approximately 1/3 length of segment II ( Figs. 19–20 ); pygofer opening with broad, median scoop-like projection and pair of rounded lateral teeth ( Fig. 27 ); aedeagus robust and strongly downcurved ( Figs. 28 , 39 ); hind leg spinulation 5-6-4................................ Xalama n. g.

Figures

FIGURES 1–6. Malaxa acutipennis (Luzon, Philippines; female, except 5); 1, habitus dorsal view; 2, habitus lateral view; 3, hind tarsus, calcar and apex of tibia (ventral view); 4, face, frontal view; 5, male terminalia, left lateral view; 6, specimen label.

FIGURES 35–37. Forewing, line art, leading margin ventrad; 35, Malaxa acutipennis; 36, Lamaxa occidentalis; 37, Xalama microstyla.

FIGURES 7–14. Lamaxa occidentalis (7–9, 13–14 paratype male, Napo River, Ecuador; 10–12 La Selva Biological Station Costa Rica); 7, habitus dorsal view; 8, habitus lateral view; 9, frontal view; 10 habitus dorsal view; 11, habitus lateral view; 12, frontal view; 13, pygofer, caudal view (embedded in balsam); 14, aedeagus, connectives, gonostyli and anal tube, left lateral view (embedded in balsam).

FIGURES 25–29. Male genitalia of Lamaxa occidentalis (25–26) and Xalama microstyla (27–29); 25, pygofer, semiventral view (note shape of process on ventral margin of pygofer opening); 26, pygofer, left lateral view; 27, pygofer, left lateral view; 28 pygofer, near caudal view; 29, pygofer, ventral view (note shape of process on ventral margin of pygofer opening).

FIGURES 38–42. Redrawn line art; 38, Lamaxa occidentalis, aedeagal complex (aedeagus, connective, gonostyli) and anal tube from Muir 1926 (figure 6); 39 Malaxa microstyla, lateral view of terminalia, from Muir 1930 (figure 7); 40, Lamaxa gracilis, caudal view of pygofer (Fennah 1945, figure 94); 41, Lamaxa gracilis, median process of pygofer, ventral view (Fennah 1945, figure 91); 42, Lamaxa gracilis, anal segment and expanded dorsocaudal portion of male pygofer, posterodorsal view (Fennah 1945, figure 93).

FIGURES 19–24. Xalama microstyla (19–22 holotype; 23–24 Peru); 19, habitus, dorsal view; 20, frontal view; 21, habitus lateral view; 22, labels; 23, habitus, dorsal view; 24, frontal view.