6 . HEMIPTERA-HOMOPTERA. 
Confined to the Neotropical Region, Tettigades possesses an extended area, from Chili 
to Mexico. This area is not known, however, to be continuous, but seems more than 
probably to be restricted altogether to the western portion of the southern continent. 
Five species are at present recorded, one of which, here described, has been received 
from Mexico. 
1. Tettigades mexicana, n.sp. (Tab. II. figg. 9, 9a, 9 8.) 
9. Head above black, front with an arcuated fascia at each side of base of face on anterior margin, an 
indistinct, narrow, broken, central longitudinal fascia on vertex, and a broad streak behind inner margin 
of eyes, luteous. Pronotum with the disk ochraceous, having a large reversed triangular spot on anterior 
margin, a large oblique patch on each side behind eyes, and a small central transverse line near posterior 
margin fuscous; anterior border narrowly, lateral and posterior borders broadly luteous. Mesonotum 
black, with two central pale lines commencing on anterior margin and terminating about one third the 
length of mesonotum; basal elevation with large horn-like and branching angles extending therefrom to about 
centre of disk, and frenum, luteous. Abdomen black, strongly pilose, with the posterior segmental borders 
narrowly ochraceous. Underside of body and legs luteous ; base and central fascia to face, inner margin of 
eyes, some irregular marks on sternum and near coxe, a linear streak on each side of femora, a spot on 
trochanters, a marginal segmental row of spots to abdomen, and a large quadrate spot on apical segment 
fuscous. Tegmina pale hyaline; radial and postcostal veins, and venation of apical third of tegmina 
fuscous; postcostal ulnar ramus and remaining venation luteous. Wings pale hyaline; basal half of 
venation luteous, apical half fuscous. 
The face is moderately convex and gibbous, distinctly transversely striated, with a broad central longitudinal 
suleation, the edges of which are slightly raised. The rostrum in the typical specimen has the apical 
joint mutilated, but apparently about reaches the posterior cox. The anterior femora are armed with 
two strong spines. Body very strongly pilose. 
Long. 22 millim., exp. tegm. 68 millim. 
Hab. Mexico (Mus. Berol.). 
This species is allied to 7. compacta, Walk., a species erroneously placed as a synonym 
of 7. chilensis, A. & S., by Berg (Hem. Argent. p. 204). The habitat given by Walker 
is “ West coast of America,” which, as before observed, is likely to have referred to 
Central America. There is, however, no other or more detailed habitat to be found in 
the records of the British Museum; and it is therefore unadvisable to insert Walker’s 
species in this fauna on such uncertain information. 
CICADA. 
Cicada, Linnzeus, Syst. Nat. i. p. 704 (1766); Amyot & Serville, Hist. des Hém. p. 473. 374 
(1843) ; Stal, Ann. Soc. Ent. de Fr. sér. 4, i. p. 614 (1861) ; Hem. Afr. iv. p. 7 (1866). 
This genus is at once separated from the three preceding by the non-produced and 
non-ampliated lateral margins of the pronotum. The basal area of the tegmina is not 
twice longer than broad; the transverse vein at the base of the second apical area is 
oblique ; and the space between the postcostal vein and ulnar ramus is linear, and not 
distinctly broader at the apex. 
The genus Cicada is a very comprehensive one, and includes a large number of 
species, some of which superficially surveyed scarcely appear to be congeneric. Stal 
