HEMIPTERA— HETEROPTERA— OOEEID^. 41 1 



Family COREID^e Stephens. 



The members of this large family do not appear to have been i-ecov- 

 ered from the rocks in any great variety of forms, and from amber but a 

 single S2)ecies is known. The Coreina and Alydinae appear to have been 

 far the most abundant among the subfamilies, the former prevailing in 

 Europe, the latter in America ; in America much the greater number of 

 all the species, and genera as well, belong to the Alydinse, a somewhat 

 remarkable fact in view of the relatively slight importance of this group 

 to-day. The Corizida were next in importance, a few species being found 

 both in Europe and America. The other subfamilies I'epresented are the 

 Pseudophloeina, which occurs only in America and in a single genus, which 

 appears, however, to have been very common ; and the Berytina, found 

 only in Europe, and the only subfamily represented in amber. Excepting 

 one Corizus, all the American species that have been found have occurred 

 only at Florissant. 



Subfamily COREINA Stiil. 



This subfamily is better represented in the European Tertiaries than 

 in our own, where it has so far been detected only at Florissant. In 

 Europe we find a dozen species of half as many genera, of which one, 

 Palseocoris Heer, with a single species from Radoboj, is regarded as extinct, 

 and another, Coreites, witli tliree species from Oeningen and Radoboj, is 

 used only as a magazine for imperfectly known forms. The other genera 

 are Syromastes, with four species from Oeningen, Spartocera, with two from 

 Radoboj, and single species of Hypselonotus at Oeningen, and Leptoscelis 

 at Sieblos. Besides Serres states that two small species of Coreus (used in 

 a general sense) occur at Aix. 



None of these at all resemble in any particular manner the forms we 

 find at Florissant, where all the species but one have to be referred to 

 extinct genera, and tlie one exception may require a similar reference when 

 better known. There are, however, but four genera with nine species. In 

 two of them, one containing four species, it is difficult to determine in wliat 

 relation they stand to existing types on account of the peculiarities of the 

 neuration of the hemelytra. A third, Piezocoris, with three species, is 

 remarkable for its large head, but otlierwise does not greatly diff"er from 



