292 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [Vol. VI. 



of them are large and nearly all fairly preserved, some remarkably per- 

 fect ; onespecies, Chrysobothris Haydeni, has been described. Elateridae 

 are more abundant, numbering more than 100 specimens, many of them 

 in beautiful condition ; they are abundantin species, over 40 having been 

 separated, and are mostly of a medium, none of a large size. Consider- 

 ably over 100 specimens are to be referred to the Meloidae, Mordellidae, 

 and Malacodermata, but the specimens do not appear to be very well 

 preserved, although about 40 species may be distinguished. The Ceram- 

 bycidae are very beautiful, furnishing 30 or more specimens, representing 

 more than half as many species ; one fine species of a new extinct genus, 

 Parolamia rudis, has akeady been described, and there are others equally- 

 fine. There are a dozen or more species of Bruchidae, one of which, 

 Spennophagus vivificatus, has been published. Chrysomelidae are not 

 uncommon ; thus far I have recognized about two dozen species among 

 the 60 or 80 specimens ; one, Oryctoscirtetes protogaeus, belonging to a 

 new genus, has already been published. Nearly twenty species ot Tene- 

 brionidae have been separated, rarely represented by more than a single 

 si»ecimen each, and there are also a few (from 2 to 10 species each) of Sil- 

 phidae, Histeridae, Dermestidae, Ptiuidae, and Cocciuellidae, and a single 

 species each of Cleridae and Telephoridae, the latter already described 

 under the name of Ghauliognathiis pristinus. Two species of Rhyncho- 

 phora, Anthonomus defossus and Eurhinus oceultus, have been described. 

 I have already mentioned the i^redominance of this type in opposition to 

 the European tertiaries. The species are very numerous, 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 to do 

 more than rudely separate the species, so that no details can now be 

 given. 



Among Hemiptera, to which eleven plates will be devoted in the report 

 in iDreparation, Heteroptera are somewhat more numerous than Homop- 

 tera, 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. Lygaeidae, Eeduviidae, and Pentatomidae abound. Corima- 

 laenidae 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), com- 

 prising 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 occur, 

 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 



