LIST OF HOMOPTEROUS INSECTS. 21 



Cicada Robeetsonii. 



Cicada Robertsonii, Fitch, Fourth Report, New York. Slate Cah. 

 Nat. Hist. 1851, 41. 



Creek Indian Territory. 



Mexico. 



Cicada nigeiventrts. 



Mas. Testaceo-viridis ; caput fascia nigra; mesothorax vittis 

 quatuor latis nigris, interioribus abbrevialis, exterioribus in- 

 terruptis, lateribus ferrugineis ; abdomen nigrum, segmento- 

 rum marginibus ventreqxie ferrugineis ; opercula dorsaiia et 

 veniralia magna subaqualia ferruginea ; aim alba, subopaccE^ 

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

 obliquis subrectis. 



Male. Allied to C. Passer. Pale lestaceous-gieen, 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, obconicai; 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. 



Cicada marginella. 



Fcem. Viridis, testaceo varia ; caput fascia postica nigra ; pro- 

 thorax vittis duabus marginalibus nigris ; abdomen subtus 

 nigro trivittatum ; alee vitrea, venis nigris basi testaceis ; 

 anticcB veiiis 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 



