Cryptotympanini

Sanborn, Allen F. & Heath, Maxine S., 2016, Megatibicen n. gen., a new North American cicada genus (Hemiptera: Cicadidae: Cicadinae: Cryptotympanini), Zootaxa 4168 (3), pp. 577-582 : 581

Key to the Genera of North American Cryptotympanini

1 Width of head including eyes slightly narrower than, about as wide as or wider than the mesonotum; body length at least 2 1/2 times the width of the mesonotum; abdomen tapering caudally ...................................................................................................... 2

- Width of head including eyes much narrower than the width of the mesonotum; length of the body less than two and one-half times the width of the mesonotum; abdomen broadly rounded caudally ............................................................................... Cacama

2 Radial and radiomedial crossveins of fore wing parallel or nearly parallel..................................................................................... 3

- Radial and radiomedial crossveins of fore wing not parallel; length of 7th apical cell more than two times the width; uncus bifurcated ............................................................................................................................................................................... Diceroprocta

3 Female sternite VII sinuous and/or length of radius posterior between the radial and radiomedial crossveins equal to or greater than length of radius posterior from radial crossvein to the ambient vein in the fore wing; uncus bifurcated .............. Diceroprocta

- Female sternite VII produced into two symmetrical, smooth lobes; length of radius posterior between the radial and radiomedial crossveins less than the length of radius posterior from the radial crossvein to the ambient vein in the fore wing ......................... 4

4 Head as wide or wider than lateral pronotal collar; female sternite VIII visible as 2 hooklike projections beneath sternite VII when viewed caudally; pygofer with a pair of spines protruding backward from the ventral edge; basal cell of fore wing black.............. .......................................................................................................................................................................................... Cornuplura

- Female sternite VIII not visible beneath sternite VII or lacking hooklike projections; pygofer lacking ventral spines; basal cell of fore wing not completely black ......................................................................................................................................................... 5

5 Head as wide as or narrower than mesonotum; cruciform elevation about as wide as long; hind wing margin wider than any of apical cells 3, 4, or 5; pygofer coffin shaped; basisternum 3 flat or slightly raised ................................................................ Hadoa

- Head as wide as or wider than mesonotum; cruciform elevation much longer than wide; hind wing margin normal; pygofer with more or less parallel sides or triangular in shape; basisternum 3 bulbous ........................................................................................ 6

6 Opercula passing rim of tympanal cavity; uncus long and broad with parallel sides thoughout its length or tapering to a finger-like projection; ovipositor not as long as dorsal beak; coloration primarily black and green, sometimes marked with brown; head as wide or wider than lateral pronotal collar; wingspan 67–102 mm ..................................................................................... Neotibicen

- Opercula extending to rim of tympanal cavity; uncus short, broad at base tapering evenly to rounded apex or tapering to an expanded apex with large, rounded downward turned lateral lobes; ovipositor longer than dorsal beak; coloration primarily black and ochraceous sometimes marked with green; head not as wide as lateral pronotal collar; wingspan 90–129 mm ......................... ............................................................................................................................................................................. Megatibicen n. gen.