1918.] 43 



NOTES ON VARIOUS SOUTH AMERICAN COLEOPTERA COLLECTED 

 BY CHARLES DARWIN DURING THE VOYAGE OF THE "BEAGLE," 

 WITH DESCRIPTIONS OF NEW GENERA AND SPECIES. 



BY a. C. CHAMPION, F.Z.S. 



Darwin, as is well known, was a keen Coleopterist, as shown by the 

 representative collection made by hiin o£ our British forms, still preserved 

 in the University Musemn at Cambridge. During the voj^age of the 

 *' Beagle," 1832-1836, he captured beetles at every opportunity, and 

 frequently mentions them in his published Journal. These insects were 

 sent direct to specialists for determination, and most of them subse- 

 quently passed into the British Museum, the last instalment of his 

 unnamed collections having been presented to that Institution by 

 Mr. C. O. Waterhouse in 1885. The conspicuous South American Cara- 

 hidae, Dyfiscidae, Tenehrionidae, etc., were named or described long 

 ago by Babington, Gr. K. Waterhouse, and others,* but the rest of 

 the American beetles have remained untouched to this day amongst the 

 " Accessions " in the Museum. The unnamed sp>ecimens, including many 

 minute forms, have recently been examined by myself, and a few of those 

 from the Tierra del Fuego and Chile are described in the present paper ; 

 the new species from the first-mentioned region are, of course, additions 

 to Enderlein's Fuegian list (1912). Darwin's Falkland Coleoptera have 

 been enumerated by me in the "Annals and Magazine of Natui'al 

 History" for Feb. 1918, pp. 167-186. 



JList of New Species descriled. 



Bemhidiomorphum (n, g.) convexum, Aulonodera (n. g.) daricini (Halti- 



(Carabidae). cidae). 



Micrarjijrtes (n. g.) ocelligerus (Sil- Lintroderes qnadrituherculatus (Cur- 



phidae). culionidae). 



Hydnobius forticornis (Silphidae). Listroderes hater ens is (Curculionidae). 



Philothermns crlbricollis (Colydiidae). Antarctobius rugirostris „ 



Elmis cfiiloensis (Parnidae). „ laticauda „ 

 Docemina (n. g.) crassipes (Halticidae). 



Caeabidae. 



Antarctoxomus Chaud, 



Antarctonomus peronl Chaud. 



Hah. Tierra del Fuego, Orange Bay {type of Chatidoir), Hard}- 

 Peninsula (C. Darwin), Navarin Isl. (C Darwin, MicJiaelsen), Hermite 



* Nok". — IIi/phi/(lru8 niuculatits Babington (1841) , found by Darwin at St, Jago. Cape Verdes, 

 was de8erib<d by Wollaston from the same island in 18»i7, untler the name H. crassiin, the latter 

 name, of ccmrse, falling as a synonym. In the " Munich Catalogue," ii, p. A'^i (18t55), the locality 

 for H. viucuhitus is incorru'etly given as " Brazil." 



