LIST OF HOMOPTEROUS INSECTS. 21 





 Cicada Robertsonii. 



Cicada Robertsorlii, Filch, Fourth Report, New York. State Cab. 

 Nat. Hist. 1861,41. 



Creek Indian Territory. 



» 



Mexico. 



Cicada nigriventris. 



Mas. Testaceo-virulis ; caput fascia nigra ; mesothorax mttis 

 quatuor talis nigris, interioribus abbreviatis, exterioribus in- 

 terrupts, lateribus ferrugineis ; abdomen nigrum, segmento- 

 rum marginibus ventreque ferrugineis ; opercula dorsalia et 

 venlralia magna subaqualia ferruginea ; alee albce, subopacce, 

 venis nigris basi viridibus ; anticce venis la et 2a transversis 

 obliquis subrectis. 



Male. Allied to C. Passer. Pale testaceous-green, partly 

 whitish beneath. Head with a black vertical band. Sides of the 

 prothorax concave, angular in front. Mesothorax with four broad 

 black stripes ; the inner pair short, obconical; the outer pair inter- 

 rupted ; sides mostly ferruginous. Abdomen black above ; hind 

 borders of the segments and under side ferruginous. Dorsal oper- 

 cula ferruginous, full as large as the ventral opercula, which occupy 

 one-third of the length of the abdomen. Wings white, rather 

 opaque ; veins black, green towards the base. Fore wings with the 

 first and second transverse veins oblique, almost straight ; first 

 parted by nearly four times its length from the second ; third 

 straight, very much shorter than the fourth, which is slightly undu- 

 lating. Length of the body 9 lines ; of the wings 30 lines. 



a. Mexico. From Mr. Cuming's collection. 



-a Cicada marginella. 



Foem. Viridis, tcstaceo varia ; caput fascia postica nigra ; pro- 

 thorax vittis duabus marginalibus nigris ; abdomen sublus 

 nigro trivittatum ; aim vitrea, venis nigris basi testaceis ; 

 anticce venis la et 2a transversis rectis non obliquis. 



Female. Green, partly testaceous. Head almost as broad as 

 the prothorax, with a black band behind the ocelli. Prothorax 

 with a black stripe on each side ; border narrow. Abdomen with 



