262 



THE ENTOMOLOGIST. 



Posterior femora towards the base on the upper surface 

 with a wider transverse keel. Empoclium thicker, beneath with 

 two chitinous spinose strips, the free margin a little or scarcely 

 emarginate. Eyes always placed on the vertex towards the base. 

 Antenna always placed in deeper pits in front of the eyes under 

 the anterior margin of the vertex. Intermediate coxas with a 

 strong meracanthus. Posterior tibiae cylindrical, each with a 

 single process, or with two conical larger processes on the outer 

 surface. 2. Cercopidse. 



/3. Flagellmn alivays composed of numerous segments ; basal 

 part longer, formed either of some {2-6) segments, or transversely 

 furcate, furnished with some scattered sensory pits ; distal part 

 divided into many segments, at least in part. Tegmina beneath not 

 carinate. Anterior margin of the wings ivithout a triangular plate, 

 sometimes someivhat convex. Metasternum short, entirely chitinous. 

 Posterior coxte much ivider than the intermediate pair, extending 

 as far as to the lateral margin of the thorax. Posterior femora 

 simple at the base. Emptodiiim thinner beneath, ivithout apparent 

 chitinous spines ; free margin profoundly incised medianly. 

 Ocelli sometimes on the vertex, sometimes on the front, occa- 

 sionally evanescent. Antennae usually inserted in front of the 

 eyes, sometimes under the eyes. Intermediate coxae somewhat 

 rarely with a meracanthus. Posterior tibiae very often prismatic 

 or foliaceous, very rarely almost cylindrical, generally seriately 

 spinulose, very rarely unarmed. 3, Jassidse. 



B. Second segment of the peduncle with many or very many 

 pecidiar {composite) sensory organs ; Jiagellum ivith a single larger 

 sensory organ on the piyriform basal segment. Intermediate coxce 

 loith the inter o -basal angles considerably or very distant inter se ; 

 coxal abduction tvell developed. Metasternum almost entirely mem- 

 branous, and this tliin cuticle is extended outwards to the lateral 

 parts of the metathorax, tvhich is inflected someivhat on the lower side 

 of the body. Posterior coxa immobile, their exterior part coalesced 

 with the metathorax ; trochantins absent. Trochanters very much 

 stouter than the posterior femora ; both an adduction\and a flexion 

 jjossible between trochanter and femur. Posterior femora with a 

 " yelloiv spot" near the base on the upper surface. Pleura of the 

 third to eighth segments largely or altogether situated laterally, 

 either altogether membranous, or with a large upper area in large 

 pai't hr altogether membranous, and a lower plate chitinous. First 

 pair of abdominal spiracles situated dorsally within the exterior 

 produced part of the metanotum. Third to eighth pairs situated 

 essentially laterally, and in large part or altogether turning out- 

 wards. 



Ocelli more rarely evanescent, more often two at the sides of 

 the head in front of the antennae ; sometimes a third ocellus is 

 found on the lower margin of the front near the base of the 

 clypeus. Antennae inserted under the eyes ; flagellum composed 



