Psithyristria

Lee, Young June & Lit, Ireneo L., 2015, A new cicada species of the genus Psithyristria Stål, 1870 (Hemiptera: Cicadidae: Cicadinae: Psithyristriini) from Luzon, Philippines, with a key to the 15 species, Zootaxa 3948 (2), pp. 296-300 : 297

Key to the males of the species of Psithyristria

1. Forewing M4 derived from medial cell or junction of ulnar cell 3 and medial cell; medial cell larger than or about as large as ulnar cell 3......................................................................................... 2

- Forewing M4 derived from ulnar cell 3; medial cell distinctly smaller than ulnar cell 3............... P. simplicinervis Stål

2. Abdominal tergites without small, round spots laterally; base of forewing M3 without roundish spots.................. 3

- Abdominal tergites 3–6 each with a pair of small, round spots laterally; base of forewing M3 with a distinct roundish spot.......................................................................................... P. nodinervis Stål

3. Uncal lobe comparatively short, extending to about half length of pygofer, with or without spines.................... 4

- Uncal lobe divided into two branches, with lateral branch nearly extending to base of pygofer and with a spine on its lateral margin and medial branch about half as long as, and much thinner than, lateral branch............................. 14

4. M+CuA extremely long, more than one-third as long as entire forewing......................................... 5

- M+CuA rather short, less than one-third as long as entire forewing............................................. 7

5. Forewing CuA1 less than half as long as CuA2; R+Sc slightly concave, M+CuA waved........... P. peculiaris Lee & Hill

- Forewing CuA1 about as long as CuA2; R+Sc convex, M+CuA nearly straight.................................... 6

6. Forewing cubital cell distinctly larger than radial cell; medial branch of uncal lobe much shorter than lateral branch and with two apical spines..................................................................... P. ridibunda sp. nov.

- Forewing cubital cell about as large as radial cell; medial branch of uncal lobe about as long as lateral branch and with single spine........................................................................... P. incredibilis Lee & Hill

7. Timbal cover long and slender, length more than three times the median width; uncal lobes with inner margins concavely curved at centre in ventral view, with tips flaring outward.................................... P. grandis Lee & Hill

- Timbal cover short and comparatively wide, length less than three times the median width; uncal lobes with inner margins not concavely curved in ventral view........................................................................ 8

8. Male abdominal tergites 7 and 8 densely covered with white pollinosity medially; apical cell 1 slightly longer than (about 1.3 times) ulnar cell 2............................................................... P. albiterminalis Lee & Hill

- Male abdominal tergites 7 and 8 without white pollinosity; apical cell 1 much longer than (more than 1.4 times) ulnar cell 2.................................................................................................... 9

9. Anterolateral pronotal collar with a few minutes, indistinct teeth; forewing M along medial cell very long, more than half as long as M+CuA; medial cell about 2.5 times as large as ulnar cell 3........................................... 10

- Anterolateral pronotal collar with or without minute tooth; forewing M along medial cell short, less than half as long as M+CuA; medial cell less than twice as large as ulnar cell 3.................................................. 11

10. Uncal lobe simple, with only one acute apex; distance across anterolateral margins of pronotal collar distinctly wider than head including compound eyes.................................................................. P. specularis Stål

- Uncal lobe with a pair of acute apices; distance across anterolateral margins of pronotal collar not wider than head including compound eyes................................................................ P. paraspecularis Lee & Hill

11. Junction of M3+4 and M4, if any, not enlarged; uncal lobes without spines or fin-like projections..................... 12

- M3+4 and M4 together forming nearly straight line, their junction enlarged and elevated; uncal lobe with one or two spines or fin-like projections.................................................................................. 13

12. Body comparatively small, 16.0–19.0 mm long; forewing nodal line distinct in medial cell; M2 derived from ulnar cell 3; CuA1 less than twice as long as CuA2; timbal cover very small, exposing most part of timbal................ P. t e n u in e r v is Stål

- Body comparatively large, about 22.2 mm long; forewing nodal line indistinct or absent in medial cell; M2 derived from ulnar cell 2; CuA1 about three times as long as CuA2; timbal cover well developed, covering most part of timbal P. paratenuis Lee

13. Body comparatively large, 20.2–22.1 mm in length; uncal lobe without fin-like projections but with small lateral spine at about midway point......................................................................... P. crassinervis Stål

- Body comparatively small, about 18.7 mm in length; uncal lobe with a pair of narrow, sharply pointed fin-like projections extending downward from apex and from paramedian margin of uncal lobe............................................................................................ P. paracrassis Lee (= P. isarogensis Boulard & Yap , syn. n.)

14. Ulnar cell 3 much less than twice as large as ulnar cell 2; distance between lateral edges of lateral part of uncal lobes about the same at proximal and distal ends; lateral parts of uncal lobes with thin and sharply pointed apex... P. moderabilis Lee & Hill

- Ulnar cell 3 about twice as large as ulnar cell 2; distance between lateral edges of lateral part of uncal lobes much greater at proximal ends than distal ends; lateral parts of uncal lobes with thick and bluntly pointed apex....... P. genesis Lee & Hill