LIST OF HOMOPTEROUS INSECTS. 21 
Cicapa Rosprrtsonit. 
Cicada Robertsonii, Fitch, Fourth Report, New York. State Cab. 
Nat. Hist. 1851, 41. 
Creek Indian Territory. 
Mexico. 
CicaDA NIGRIVENTRIS. 
Mas. Testaceo-viridis; caput fascia nigra; mesothorax vittis 
quatuor latis nigris, interioribus abbreviatis, exterioribus in- 
terruptis, lateribus ferrugineis ; abdomen nigrum, segmento- 
rum marginibus ventreque ferrugineis ; opercula dorsalia et 
ventyalia magna subequalia ferruginea ; ale albe, subopace, 
venis nigris bast viridibus ; antice 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 
{ac 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 oceupy 
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. 
Fem. Viridis, testaceo varia; caput fascia postica nigra ; pro- 
thoraw vittis duabus marginalibus nigris ; abdomen subtus 
nigro trivittatum; ale vitree, venis nigris basi testaceis ; 
antice 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 
