March, I9I5-] Van Duzee : West Coast Cicadid.e. 27 



11. Surface more polished, blue-black with orange-fulvous markings; the 



pronotum usually bordered all around with orange; male valve more 

 elongated (4-5 mm.) ; narrow apex of its last ventral segment rounded ; 



uncus without an apical hook 21. riinosa Say. 



Surface less polished, the pale markings reduced ; pronotum with hind 

 margin only pale; male valve shorter (3 mm.); apex of last ventral 

 segment of male broader and sinuated ; uncus hooked at apex. 



23. vanduzeei Dist. 



12. Head narrower (6 mm.) ; venter banded with black, at least on the con- 



nexivum ; last ventral segment of male narrow and rounded at apex ; 

 uncus narrowed at apex, without a hook; inhabits eastern states. 



25. noveboracensis Emm. 

 Head wider (7 mm.) ; venter pale, immaculate except at base and on apical 

 segment of the female ; last ventral segment of male shorter, truncate 

 and sinuated at apex ; inhabits California. 



24. vandnseei var. consohrina Dist. 



13. Pale markings of the mesonotum extended, confluent, at least the anterior; 



head wider, 6 J/2 mm 27. californicus Dist. 



Four anterior pale marks of the mesonotum wanting or nearly so ; head 

 narrower, 5 mm 28. striatipes Hald. 



14. Supra-antennal plates elliptical, its anterior edge transverse 15 



Supra-antennal plates oblique 16 



15. Basal areole of the elytra narrowed to a rounded apex. 



29. triangiilata Davis. 

 Basal areole of elytra parallel-sided, its apex rectangular. 



30. mercedita Davis. 



16. Length 15 to 17 mm.; anterior edge of the pronotum with a narrow 



linear callouse ; male uncus with a rather long pointed hook. 



33. mi nut a Davis. 

 Length 18 mm.; male uncus with an obtuse hook or without a hook.... 17 



17. Anterior margin of pronotum broadly depressed, without a distinctly cal- 



loused linear edge ; median apical area of pronotum rather acutely 



triangular 31. synodica Say. 



Anterior margin of pronotum with a linear calloused pale edge ; median 

 apical area of pronotum more broadly and obtusely triangular; male 

 uncus with a short broad hook at apex 32. nncinata n. sp. 



Genus 7- TIBICINOIDES Dist. 



Distant, Ann. Mag. Nat. Hist., Sen 8, XIV, p. 166, 1914. 



Type Tibicen cupreo-sparsa Uhler. 

 Larger (20 mm.) ; lateral areas of pronotum with their grooves pale or 

 rufous; mesonotum with pale marks at the anterior points of the X; 

 venter pale, the basal segment only marked with black. 



35. hesperins Uhler. 



