150 THE KNTOMOLOGIST. 



of considerable size ; the coxal movements are similar to those in 

 the Stridulantia, and there is no meracanthus. The trochanters 

 are supporting, and the movements between them and the 

 femora are not so altogether feeble. The femora present nothing 

 distinctive. 



4. Falgondce. — The metasternum (pi. ii. f 6) has a comider- 

 able length in the direction of the insect's longitudinal axis, and is 

 (with the exce[)tion of a small somewhat firm plate (b^) anteriorly 

 in the middle and a narrow transverse strip, which is partly 

 covered by the middle coxae, along the anterior margin) com- 

 pletely membranous (b) right up to a small space from the insect's 

 lateral areas ; while the latter (c), which are bent somewhat in- 

 wardly and ventrally, are strongly chitinised. The posterior 

 coxse are most nearly contiguous at the middle plane of the 

 insect, and are inserted as far back as possible on the meta- 

 thorax; so that, in spite of their feeble extension in the direction 

 of the insect's length, they reach somewhat backwards over the 

 base of the abdomen, whose ventral surface lies in a plane which, 

 seen from below, is considerably lower than that of the meta- 

 sternum. The coxae are contiguous anteriorly with the meta- 

 sternal membrane, but laterally they are limited by firm chitin 

 (7 a), with ivhich theg are consolidated so intimately, that a true 

 separating suture has disappeared, and one can at most find 

 only a feeble furrow (b). The presence of a more or less 

 developed meracanthus (7d), and a compari^-on with the struc- 

 ture in the Cercopidse, make it clear that the coxae extend out to 

 a shorter distance from the lateral margins of the insect. (The 

 whole structure of the coxae and their attachment are, moreover, 

 so different from other Auchenorrhyncha, that I do not see my 

 way to elucidate all the questions hither appertaining. A large 

 prolongation of the coxal chitin is thus continued forward and 

 somewhat outward within the interior of the metathorax, but the 

 significance of this is unknown to me.) The trochantins I have 

 not been able to discover. The trochanters (fig. 7e) are short 

 and much thicker, up to twice as thick as the femora; their move- 

 ments with the coxae follow a very exact and precise plan, but the 

 axis is sometimes (as, for example, in Falgora) nearly perpen- 

 dicular to the body, sometimes more oblique ; movements in the 

 given plane are very large, and the connecting membrane facing 

 the middle line has an extraordinary breadth, which is easily 

 seen, for example, in Falgora. The articulation between the 

 stout trochanters and the femora (g) differs very much from the 

 condition in other Auchenorrhyncha, for they admit of a by no 

 means feeble movement in several directions. The femora are 

 almost equally stout everywhere, and near the base one finds on 

 the dorsal side an oval or rounded, bright wJtitish or yellowish spot 

 (f. 8 a), which is somewhat convex, sharply limited, and whose 

 outer chitin-layer shows, seen with about 600 diameters, a 



