FAM. CJCADID.E 2 5 



Division CICADARIA 



Cicadaria. Distant, Ann. Mag. Nat. Hist. (7), Vol. 14, pp. 329 et 420 (1904). 



Characters. — In this division the lateral margins of the pronotum are more or less convex, 

 but not toothed ; the tegmina and wings are quite clear, as in many species of the genus Cicada, or semi- 

 opaque, as represented in the genus Cryptotympana ; the head is broad and (including e3'es) always a little, 

 and generally considerably, wider than base of mesonotum. 



Stal (Oefv. Yet.-Akad. Forh. (1870), p. 714, proposed some subgenera, but on characters which, 

 I venture to think, are insufficient and of a transient character. Thus his « nodo apicah scutelli », which 

 I take to be the cruciform elevation at the base of the mesonotum, is described as typical of Chremistica 

 in being •< transverso, convexo ••. But this, though characteristic of the species he refers to, is not 

 constant in the larger generic purview to which 1 am inclined, and the same remarks apply to the 

 characters on which his subgenus Diceroprocta is founded. Had Stal subsequently revised the whole 

 familv with the skilled acumen displayed in his >< Enumeratio Hemipterorum », there is a great proba- 

 bility that he would have shared these views. 



The Cicadaria are Cosmopilitan in distribution. 



SYNOPSIS OF GENERA 



I. Metastenmm not, or very slightly, elevated, and not provided with a posterior 

 process. 



A. Length of head more than half the breadth of space between eyes; face 



usually very prominent. 



a. Head (including eyes) considerably broader than base of mesonotum . 



b. Lateral margins of pronotum with a distinct anterior lobe .... 1. Genus Macrotristria. 



b'. Lateral margins of pronotum without an anterior lobe ... 2. Genus Rihana. 



B. Length of head about half the breadth of space between eyes, or sometimes 



very slightly longer; head moderately truncate in front of eyes, face not 

 prominent. 



a'. Head (including eyes) about as 'wide as, or very little wider than 

 base of mesonotum . 



c. Eyes more or less oblique and porrect, longer than broad 3. Genus Cicada. 



c'. Eyes- circular, as long as broad, moderately exserted upwardy . 4. Genus Antankaria. 

 a". Head (including eyes) little more than two-thirds the 



breadth of base of mesonotum 5. Genus Cacama. 



C. Length of head not half the breadth of space between eyes. 



a"'. Head (including eyes) very much broader than base 

 of mesonotum ; space between eyes almost equalling 

 breadth at bast of mesonotum ; in front of eyes obli- 

 quely inclined, but not truncate 6. Genus Oria. 



II. Metasternum elevated at middle and furnished with a posterior process directed 



backwards 7. Genus Cryptotympaxa. 



23. Genus MACROTRISTRIA, Stal 



Macrotristria. Stal. Oefv. Vet.-Akad. Forh. (1870), p. 714, note. 



