282 GEOLOGICAL SURVEY OF THE TERRITORIES. 
Spermophagus vivificatus, has been published. Chrysomelidae are not 
uncommon; thus far I have recognized about two dozen species among 
the 60 or 80 specimens; one, Orycioscirtetes protogaeus, belonging to a 
new genus, has already been published. Nearly twenty species of Tene- 
brionidae have been separated, rarely represented by more than a single 
specimen each, and there are also a few (from 2 to 10 species each) of Sil- 
phidae, Histeridae, Dermestidae, Ptinidae, and Coccinellidae, and a single 
species each of Cleridae and Telephoridae, the latter already described 
under the name of Chauliognathus pristinus. Two species of Rhyncho- 
phora, Anthonomus defossus and Hurhinus occultus, have been described. 
I have already mentioned the predominance of this type in opposition to 
the European tertiaries. The species are very numervus, nearly 120 
having been separated, with over 500 specimens, and among them are a 
goodly number of large and fine species; but some of the minutest are 
most admirably preserved; especially is this true of.the sculpturing 
of the thorax and elytra; no attempt, however, has yet been made todo 
more than rudely separate the species, so that no details can now be 
given. They will occupy seven plates of the forthcoming report, with. 
one hundred and seventy figures.* 
Among Hemiptera, to which eleven plates, with two hundred and 
eighteen figures, will be devoted in the report in preparation, Heterop- 
tera are somewhat more numerous than Homoptera, both in individuals 
and species. The Heteroptera present a great variety of forms, over 
100 species having been detected, three-fourths of which can be referred 
to their proper place; they will occupy seven plates, with one hundred and 
thirty-five figures. Lygaeidae, Reduviidae, and Pentatomidae abound. 
Corimalaenidae of several species are very common; but the most common 
of all are one or two species of Alydina (one of the groups of Coreidae), 
comprising perhaps a third of all the Heteroptera. There are two species 
of Aradidae, and half a dozen specimens of a very pretty species of 
Tingis, well preserved; but in general the preservation of the Heterop- 
tera is not so good as of the Homoptera. Very few water-bugs oceur, 
but there are two or three species, among them a slender and very prettily 
marked Corixa. There are about 65 species of Homoptera, of which 
nearly one-half belong to the Cercopida. One genus, resembling Ptyelus, 
is represented by a dozen or more species, comprising together perhaps 
nine-tenths of all the Homoptera, some of the species being represented 
by 40 or 50 specimens. There are a few large Fulgoridae; one has the 
long recurved process of ‘the head almost perfectly preserved. Two 
gigantic Aphrophorina have already been described as belonging to a 
new genus, and been named Petrolystra gigantea and P. heros ; butt as a 
whole the species are of medium size, with some minute and slender 
forms, the position of whichis as yet undetermined. Plant-lice are com- 
mon, and include probably 8 species, all Aphidiinae excepting one, which 
is referred to Schizoneuridae; an entire plate is devoted to them, with 
nineteen figures. Many of the Homoptera have their markings beauti- 
fully preserved; especially is this the case in a variegated Typhlocypha 
or allied genus, and the venation of others is as complete as in the living 
form. No Stridulantia have occurred. 
Sixty or seventy specimens of Orthoptera have been found, all the 
families being represented excepting Gryllidae and Mantides. Six speci- 
mens and nearly as many species of Locustariae are present; the finest, 
*The execution of these plates, which are drawn by Mr. J. H. Blake, and engraved by 
Messrs. Sinclair & Son, is far superior to that of any illustrations of tertiary insects 
es have yet been published. It leaves nothing to be desired, either in accuracy 
or finish. 
