HEMIPTE11A IIOMOPTERA CEKCOPID.E. 315 



This description is based wholly upon the specimen illustrated in Fig. 

 17. That given in Fig. G and two others are too imperfect t<> determine 

 that they certainly belong hero, but they may form a second species of tin- 

 genus with less strongly curved veins. 



Length of body, 6.75 ram ; breadth, 3 mm ; length of tegmina, 5.5 mm ; 

 breadth, 2 mm . 



Florissant. Four specimens, Nos. 4625, 4747, 9299, 10479. 



Family CERCOPID> Leach. 



This was the prevailing type of Homoptera in Tertiary times, at least 

 if the number of individuals be regarded. At Florissant they appear to 

 form' three-fourths of the whole bulk. As compared with Fulgorina they 

 were there slightly less numerous in species and genera, but five tinx 

 as numerous in individuals. Most of the extinct forms have been referred 

 by authors and especially by Germar and Ileer to the existing genera Cer- 

 copis and Aphrophora, but, as we shall see, these references were so far 

 incorrect that in several instances they belonged to the alternate subfamily 

 and not to that to which they were referred. 1 So, too, one insect found in 

 the Isle of Wight Tertiary is referred to an existing form, but probably 

 without sufficient reason. As to our own species, some of them an- gigantic, 

 nearly all large, and by far the greater part of them allied to types now 

 found only in the tropics of the New World, and yet I have been unable in 

 any instance to refer them to existing genera, though doubtless some of 

 them will be found so referable. The lack of sufficient tropical materials 

 in the museums of this neighborhood compel the description of several 

 genera as new which may prove still extant. 



Subfamily CERCOPIDA Stal. 



The larger part of the fossil Cercopida- that have been dex-ribed have 

 been referred to this subfamily, but in several instances, as will lie poi' 

 out, the reference i> incorrect. Then- remain, however, several >pecies of ( Yr- 

 ropis, a ( Yiropidiimi, and a Triecphora (this latter regarded as an existing 



1 Tin-re I." :i mistakr 111 I ICTI'M \\ ork "II Oollin<;itll itisi-rls ill tin- tvlVrrliriM l.i tin- *|i..|-i.-. ..[' I . 

 on I 'I. II. The plate 18 Correctly markril, lint III" scpai 'at*' rvplaiiatinn <>!' I hi' 1 1 1, it i' an 1 1 t': 

 in t In- trxt ;;i s ! :i li 41111' I" ( '. nil HIT! wllirll elm's lint BXISt, a MI I Milk.- 016760 li ;i]i 18 : I 1 I. < ito lli'M 

 tlinr an- niily trii. Tin' rrlVn-n.-i-, ;.. ( '. |>alliil:>, ni'Tiin^i-u ,it, l'.i-n lal a, ami i > li'lim- i. whi 

 opectivclj ri, <J, Id, ami 11, slmiilil lie 7, n, ;, anil Id. 



