Hyalessa

Puissant, Stéphane & Lee, Young June, 2016, Description of a new species of the genus Hyalessa China (Hemiptera: Cicadidae: Sonatini) from Yunnan, China, with a key to the species of Hyalessa and a calling song analysis for two Hyalessa species, Zootaxa 4114 (4), pp. 434-446 : 439-440

Key to the species of Hyalessa

1. Fore wing cubital cell narrower than or of equal breadth to medial cell across the middle of the two cells............... 2

- Fore wing cubital cell much broader than medial cell when comparing the middle of the two cells.................... 11

2. Fore wing slender, with ratio of fore wing length to fore wing width being> 3; pronotum with posterolateral corner moderately or slightly developed, having head and pronotum together look trapezoid........................................ 3

- Fore wing comparatively broad, with ratio of fore wing length to fore wing width being much less than 3; pronotum with pos- terolateral corner much expanded laterad, having head and pronotum together look nearly triangular............. obnubila

3. Timbal cover not so large, with gap between timbal covers about as wide as or wider than timbal cover................ 4

- Timbal cover very large, with gap between timbal covers much less than width of timbal cover...................... 10

4. Male abdominal sternite VIII comparatively small, shorter than half the length of sternites III, IV, V, VI, and VII together; male abdomen much wider than mesonotum.................................................................... 5

- Male abdominal sternite VIII comparatively large, longer than half the length of sternites III, IV, V, VI, and VII together; male abdomen about as wide as mesonotum........................................................... melanoptera

5. Fore wing with distinct infuscations; head and thorax multi-colored or with many marks............................ 6

- Fore wing infuscation indistinct or absent; head and thorax black with limited or no marks........................... 9

6. Basal membrane and hind wing jugum mostly gray........................................................... 7

- Basal membrane and hind wing jugum green....................................................... virescens

7. Male opercula light colored, comparatively small, extending slightly beyond posterior margin of sternite II; uncal lobe much widened apically..................................................................................... 8

- Male opercula mostly fuscous, considerably large, extending beyond anterior one-third of sternite III; uncal lobe evenly nar- row...................................................................... scutata Puissant & Lee , sp. nov.

8. Rostrum extending far beyond posterior margin of hind coxae; timbal cover comparatively small, with gap between timbal covers wider than timbal cover...................................................................... fuscata

- Rostrum extending slightly beyond posterior margin of hind coxae; timbal cover comparatively large, with gap between timbal covers about as wide as timbal cover........................................................... maculaticollis

9. Uncal lobe much broader in middle than in subapex; uncal lobes not separated from each other............... batangensis

- Uncal lobe in nearly same breadth in middle and in subapex, uncal lobes separated from each other from middle to apex of uncus........................................................................................ ronshana

10. Male timbal cover mostly black; uncal lobs narrow and separated from each other from base................... expansa

- Male timbal cover ochraceous; uncal lobs broad and abutting except apical parts...... stratoria (= Hyalessa ella syn. nov.)

11. Ulnar cell 3 about twice as long as apical cell 5; male opercula overlapped medially............................ wangi

- Ulnar cell 3 less than 1.7 times as long as apical cell 5; male opercula not overlapped medially.................. mahoni