8 HEMIPTERA-HOMOPTERA. 
A female Mexican specimen, belonging to the collection of the Vienna Museum, is 
here figured. The localities of Walker's types are unrecorded. 
I have not seen a male specimen of this species, so cannot describe the opercula. 
Judging from the female, C. dicosta is allied to C. rudis, but differs by the more tumid 
face and the much less interspace between that and the eyes. 
3. Opercula reaching the base of the second abdominal segment, overlapping, and with 
their apices rounded. 
5. Cicada rudis. (Tab. II. figg. 20, 20a, 203.) 
Fidicina rudis, Walk. List Hom. Suppl. p. 13%. 
Cicada rudis, Stal, Ofv. Vet.-Ak. Férh. 1862, p. 484. | 
Hab. Mexico (Mus. Berol.; Bilimek, Mus. Vind. Ces.; Boucard, Mus. Holm.), 
Orizabal, . 
The specimen figured is in the Vienna Museum. Walker described this species as 
nearly allied to C. tibicen; on the contrary, however, it much resembles the well-known 
European species C. fraxint. 
3. Opercula reaching the apex of the first abdominal segment, inner margins contiguous. 
6. Cicada montezuma. (C. rudis, var., Tab. II. figg. 2, 2a, 26.) 
Allied to C. rudis, but smaller, the transverse veins at base of second and third apical areas infuscated ; 
opercula only reaching to base of first abdominal segment, with the interior margins parallel and conti- 
guous, but not overlapping. Face much narrower. 
Long. 26 millim., exp. tegm. 75 millim. 
Hab. Mexico (Mus. Berol.). 
3. Opercula reaching apex of first abdominal segment, inner margins divergent. 
7. Cicada pallida, n.sp. (Tab. II. figg. 7, 7a, 73.) 
Head pale greenish, with two small transverse spots on centre of front, two larger ones near inner margins of 
eyes, and two large lunate spots, partly surrounding the two posterior ocelli, black. Pronotum pale 
greenish and unicolorous. Mesonotum ochraceous, with two large obconical spots commencing on anterior 
margin, on each side of these a smaller and more oblique spot of the same description, a broken submar- 
ginal longitudinal fascia, and two small rounded spots on posterior portion of disk fuscous. Abdomen 
above ochraceous. Head beneath pale greenish. Sternum, legs, opercula, and underside of abdomen 
ochraceous. Tegmina pale hyaline; venation of about basal two thirds ochraceous, that of apical third 
fuscous. Wings pale hyaline; basal half of venation ochraceous, apical half fuscous. 
The face is large, robust, and convex, faintly transversely striate, and with a faint central raised longitudinal 
line. Opercula rounded, divergent, meeting only at antericr angles, posteriorly reaching apex of first 
abdominal segment. Tympana somewhat large and prominent. The body alone is sparingly pilose, the 
frenum most densely so. 
Long. 21 millim., exp. tegm. 61 millim. 
Hab. Mexico (Mus. Berol.). 
