62 ORIENTAL CICADID.E. 



Long. excl. tegm. <? , 24 millim. Exp. tegm. 78 millim. 



Hal). — Malayan Archipelago : Bokneo : Sandakan (Pryer — coll. Dist.). 



The peciiliar structure of the opercula which allies this and the two preceding species, 

 has in C. opcrciolissima reaching its maximum development. It is, however, more than 

 probable that other allied species remain to be discovered. 



eee. Opercula slightly constricted at base, narrowed towards apex. 



37. Cosmopsaltria mongolica. (Tab. IV., fig. 3, a, h.) 



Cosmopsaltria mongolica, Distant, Trans. Ent. Soc. 1881, p. 638. 



Body above ochraceous ; head with the black markings as in C. diirga ; pronotum with two central 

 longitudinal fascise placed close together, narrowed, rounded, and meeting on posterior margin, more 

 separated and widened on anterior margin, and on each side of these a curved fascia followed by two 

 oblique ones. Mesonotum marked and spotted as in C. durga. Abdomen with a series of transverse, 

 irregular, dull castaneous discal fascise, becoming confluent, and occupying the whole of apex, and a 

 lateral segmental series of irregular- shaped spots of the same colour. Body beneath pale ochraceous, 

 a large spot on inner margin of eyes, apical margins of face and apes of rostrum, piceous. 



Tegmina and wings pale hyaline. 



Face not prominently convex, with the disk sulcated and the margins strongly striated. Kostrum 

 passing posterior coxse, about reaching inner angles of opercula; opercula reaching third abdominal 

 segment, with the outer margins parallel with lateral margins of abdomen for half their length, then 

 becoming convex, and again narrowed to apex, widened inwardly, but not meeting at apex of first 

 abdominal segment, and then narrowed and divergent to apex, which is broad and rounded. Posterior 

 tibiffi with two long spines on inner and outer margins. 



Long. excl. tegm. 3' , 31 millim. Exp. tegm. 82 millim. 



China: Northern district? (coll. Dist.). 



38. Cosmopsaltria silhetana. (Tab. VI., fig. 1, a, h.) 



Cosmopsaltria silhetana. Distant, Ann. & Mag. Nat. Hist. ser. G, vol. i. p. 295 (1888). 



Body above shining brownish olivaceous. Head with two central black spots on front and with an 

 irregular black fascia across vertex, widening at area of ocelli, and the posterior margin of the eyes black. 

 Pronotum with two central black fascia, the oblique incisures black, the basal margin greenish. 

 Mesonotum with the following black markings : — a central longitudinal fascia, on each side of which is a 

 slightly oblique obconical spot ; these are each followed by a very much smaller spot, and again by a short, 

 broad, irregular spot, all starting from anterior margin ; two long discal spots and a small rounded spot 

 in front of each anterior angle of basal cruciform elevation. Abdomen above with the disk much shaded 

 with dark shining fuscous ; posterior segmental margins greenish. Body beneath very pale olivaceous, 

 with a greyish tinge ; face with the apex and a central fascia black ; apex of rostrum, apices of the tibiae, 

 anterior tarsi, and bases and ajiices of intermediate and posterior tibiae fuscous. 



Tegmina and wings pale hyaline, venation brownish ; costal membrane and base of upper ulnar 

 area ochraceous ; transverse veins at bases of second and third apical areas infuscated. 



The rostrum reaches the apex of the posterior coxae ; the opercula gradually narrow towards apices, 

 which are obtusely angulated and reach the fourth abdominal segment. 



Long. excl. tegm. 28 millim. Exp. tegm. 72 millim. 



Hab. — Continental India: Sylhet (coll. Dist.). 



