study of Genera of Coleoptera. 49 



formed on a Gorticaria, Gateretes on an Atomaria, Mono- 

 toma is our modern 8ynchyta as is clear from Helhvig's 

 paperj and Bitoma -^Lyctus. 



Fabricius, in the second volume of his Entomohgia, 

 adds five genera: Sagra, ^ Dry ops [nee Oliv.], Passalus, 

 Molorclms {M. major), and Upis. Colydimn and Lyctus 

 are only alterations from Cylonium and Lygdus. The type 

 of Colydnmi is, however, Aidonhim sidcatum, and not 

 C. elongatuiu. Lyctus is heterogeneous, and has no 

 type. 



1794. Fabricius, in the Appendix to the same work, 

 gives a new genus Cychrus, with erroneous characters. 



Panzer, in his Fauna, briefly describes the genus HaJ- 

 lomenus {H. humeralis) . 



Kugelann, in Schneider's Magazin, describes seven new 

 genera : Trixagus, || Volvoxis, Cychramus, 8cymnus, 

 Brachypterus , Hydrcena, and Bryaxis. The first of these 

 has been used for Throscus, but a comparison of his 

 description will show that he rather meant Byturus. 

 Bryaxis is rather Bythimis, Leach, than anything else. 



1795. Herbst, in his sixth volume, describes Ehynco- 

 pliorus (jB. palmarum) . 



Olivier, in the fourth volume of his Entomologie, de- 

 scribes Necrohia (type N. violacea = cceridea, De G.). 

 Hence Corynetes and Necrohia have been just reversed. 



Hell wig, in his edition of the Fa,una Etrusca, defines 

 Endontychus, Rhynchites, Ptomaphagtis (P. sericeus) , Boli- 

 tophagus [B. agricola) . Thus Ptomaphagiis is the earliest 

 of the four names applied to Gatops. 



1796. Latreille, in the first of his works, the Precis des 

 Caracteres Generiqucs, enumerates 148 genera, twenty-one 

 being new : Geotrupes, Protelnus, Dacne [Engis humeralis) , 

 Gholeva [= Ptomaphagus, Hellw.], Orthocerus, Ele- 

 dona [ = BoIitophagus, Hellw.], Pediniis, Leiodes (Anis. 

 picea, 111.), Gnodalon, Pytlio, Throscus, Dascillus, Elodes 



{E.pallidus), JJleiota, Gis , Phloiotrihus , Gercus [=^ Brach- 

 ypterus, Kugel.], Byturus [Trixagus, Kugel.], Lesteva, 

 Drypta, and Stenus. Dacne ought to be kept for Engis ; 

 Pedinus is founded on Grypticus quisquilius, which is left 

 as the type in his two succeeding works ; Byturus is at 

 least as bad as Kugelann's genus, for he includes Meli- 

 gethes in it. 



TRANS. ENT. SOC. 1870. — PART I. (MARCH.) E 



