290 OBSERVATIONS ON THE 



Cissites (Horia) testacea, or Scarabcens ( Chrysophora? ) 

 macropus (Francillon) are very much thickened, yet it does 

 not appear that any of them are sahatorial. In hke manner 

 our British genera, CEdemera^ Notlms, and Chalcis, are not 

 able to leap. 



On the other hand, many species which leap well are not 

 provided with thickened legs. Of these the whole of the 

 Linnaean genus Cicada, or froghoppers, may be mentioned. 

 So the genera Eiipelmvs, Encyrtus, Cerchyshis, &c. 

 (belonging to the Chalcididcc), which have simple hind legs, 

 are able to leap to a very great distance, probably by means of 

 the peculiar formation of their intermediate tibiae and tarsi. 

 But there are very many species belonging to the same family 

 as the latter genera, the structure of whose legs appears to be 

 in no wise capable of executing a leap, and yet they are able to 

 do this in a very remarkable and inexplicable manner; this is 

 the more extraordinary, since we have seen that the typical 

 genus in the family Chalcis is simply a walker, although it 

 has thick hind legs. 



The only remaining insect which I shall notice as capable 

 of leaping, although having only simple legs, is the Choragus 

 Sheppardi of Kirby, upon the affinities of which I now pro- 

 pose to make a few observations. 



This genus was first described in Mr. Kirby's admirable 

 " Century of Insects," published in the " Linnaean Transactions," 

 from specimens taken '' strenue saltans" at Offton, in Suffolk, 

 by the Rev. R. Sheppard. In Mr. Kirby's description, we 

 find the body described as cylindric, the antennae clavate, with 

 the two basal joints incrassated, and with a three-jointed club, 

 and the clypeus elongate. Mr. Kirby was not able to dis- 

 cover more than three joints in the tarsi, but Mr. Curtis 

 discovered four in one tarsus. For the reception of this 

 genus Mr. Kirby proposed a distinct family, which he named 

 Choragida, observing that its general habit connected it with 

 the Tetramera, especially Cis and Cryptocephalus. 



Mr. Stephens places this insect in the Pentamerous family, 

 Pl'inidce (without any observations upon its tarsi), between 

 OcJdna and Cis, stating — " Choragus is evidently allied to Cis, 

 from which it differs, not only by having the two basal joints of 

 the antennae incrassated, but by the form of the body, which 

 resembles that of a Cryptocephalus, the subsetaceous palpi, 



