80 KANSAS UNIVERSITY SCIENCE BULLETIN. 



extending to the outer edge of the tegmen in this region ; but 

 are surrounded by an unveined membrane, the limbus. (See 

 fig. 75, pi. XIX.) The third apical cell is characteristic in 

 genera, and often forms the basis for classification. The 

 tegmina are not covered laterally by the pronotum, but are 

 free, united to the thorax below the humeri of the pronotum. 

 When at rest, the tegmina lie with the costal region downward, 

 as in the Aphididse. 



The Wings are more or less spatulate and broad ; smaller 

 than the tegmina, the anterior margin being about equal to the 

 posterior margin of the tegmina. When at rest the wings are 

 folded once and lie between the tegmina and abdomen, the 

 costal region downward. 



The wing is uniformly transparent and clearly veined. Here 

 is again found the division into the corium and clavus, the ce- 

 rium usually having the costa and two other longitudinal veins 

 (radia and ulnar) proceeding from its base. Here the costa 

 does not always form the anterior margin as in the tegmina, 

 almost the entire nerve area being bounded by the narrow 

 limbus. 



In the clavus are two anal veins, the second of which fre- 

 quently lies in the posterior margin. There are three and 

 sometimes four basal cells, in the third of which is a sutural 

 fold. There are no discoidal cells, and frequently only three 

 apical cells, although there may be more in some genera. 



The Hind Legs are fitted for jumping. The femora are 

 cylindrical and curved, the tibiae quadrangular, prismatic or 

 spatulate. In the metathoracic leg the tibia is densely spined, 

 with the points of the spines downward, toward the end of the 

 claws. The tarsi are composed of three segments, the first one 

 longer than the other two. The last segment of the tarsus 

 ends in a pair of sharp, black claws. (Fig. 2, pi. V.) 



Color. Buckton figures some of the species in brilliant reds, 

 yellows, and vivid greens, but the Kansas forms are modest in 

 their colorings. Some few are pale green when alive, as 

 Ceresa hubalus, Ceresa taurina, and Stictocephala, turning 

 tawny when dried. A great number are mottled brown and 

 tan, with touches of black or white, sometimes both. (See 

 Entylia sinuata, figs. 61, 62, pi. XVI; Ceresa diceros, fig. 6, pi. 

 VI; Vanduzea, fig. 15, pi. VIII; and Telamona, fig. 73, pi. X.) 

 The only bright colors met with in the Kansas species occur in 



