FOSSIL FAUNA AND FLORA OF THE FLORISSANT SHALES 167 



HoMOPTERA (80 species) 



CoccidcB. One^ considered to be a male of the still existing genus Pal<zococcus. 



AphididiB. All the genera extinct. 



Subf. AphidituB. 24 species, placed in 11 genera. 

 Subf. SchizoneurincB. 6 species, referred to 4 genera. 



Psyllidce. 2 species, belonging to two extinct genera. 



FulgoridcB (sens, latiss.) 13 species, of 7 genera, of which three are extinct, and 

 three others are only provisionally employed. 



CicadidcR. One species, placed in the modern genus Cicada. 



JassidcB (sens. lat.). 11 species, of 8 genera. Two genera are described as extinct; 

 3 modern genera are only provisionally or doubtfully recognized. 



CercopidiB. 22 species, placed in 9 genera, of which six (including the most abun- 

 dant and characteristic species) are extinct. One of the modern genera is 

 only provisionally employed. The extinct genus Petrolystra includes a 

 couple of very large species, having the tegmina 2g\ and 28^ mm. long 

 respectively. 



Heteroptera (140 species) 



CorixidcR. 3 species, of 2 genera, one extinct. 



NotonectidcB. i species of the modern genus Notonecta. 



Veliidce. 2 species, of 2 genera, both extinct. 



HydrobatidcB. i species, of an existing genus. 



ReduviidiB. 2 species, representing 2 genera, both extinct. 



TingididcB. 3 species, of 3 genera, one of them extinct. 



Capsid(B. 13 species, of 7 gehera, only one described as extinct. 



LygoRidm. 49 species, placed in 24 genera, of which 16 are extinct. Two of the 

 species are Pyrrhocorids, referred to the modern genus Dysdercus. From 

 the figures, it seemed to me that Necrochromus cockerelli Scudd., might 

 belong to the Phymatidae, but Prof. Herbert Osborn, whom I consulted 

 about the matter, thinks it is probably a true Lygasid. 



Coreid<B. 33 species, referred to 14 genera, 10 extinct. 



PentatomidcB. 2,t, species, of 14 genera, 13 extinct. 



Ephemeroptera (six nominal species) 



EphetneridcB. One species described from a poorly preserved adult, and five from 

 nymphs; all referred, in a general sense, to Ephemera. The nymphs have 

 characters of various genera; E. immobilis suggests Baetis; E. tabifica has 

 some resemblance to Potamanthus; E. macilenta recalls Hexagenia; E. 

 pumicosa and interempta may be related to Ephemerella. 



Neuroptera (12 species) 

 Chrysopid^. 4 species, belonging to 2 extinct genera. 

 H enter obiidxB. i species, of the existing genus Osmylus. 



