106 



The above genera belong to the Histeroidea and 

 to the sections a, b, & c, family names may be 

 given ; the first being denominated Hololeptidae, 

 the second Histeridae ; for the third, which probably 

 will eventually be considerably increased, I suggest 

 the adoption of the term Cylindridae, expressive of 

 the form of the genera composing it. Hister evi- 

 dently is closely related to the Silphidae, not only 

 in habits, but also from its internal anatomy, as 

 well as its larval form. Mr. MacLeay, in his 

 valuable work, entitled the Annulosa Javanica, 

 maintains a relationship existing with the Lamelli- 

 corns ; Mr. Kirby also, in the Fauna Boreali 

 Americana, connects Hister on the one hand with 

 the Necrophaga, and on the other with the Philhy- 

 dridra, Tryponaeus of the New World, from its 

 cylindrical form, and other accordances, evinces a 

 relationship with the Xylophaga. Mr. Westwood 

 also states, that the cornuted thorax of the males 

 intimates a connection with Sinodendron and the 

 Lamellicorns ; there is therefore an apparent union 

 of Hister with the Coprophagous, as well as the 

 Xylobious Lamellicorns, which might naturally be 

 expected (a). 



(a) For an account of the various Swedish authors who have 

 written on the Histeroidea, consult Paykull's Monograph, on Hister, 

 and Thunherg's Coleoptera Capensia. — Vid. Mem. St. Petersburg, 

 Vol. 7, (1820) and Gyllenhall. 



Of the English writers, see Leach's Zoological Miscellany, 

 Vol. 3, and also a new genus in the Plymouth Transactions, 

 MacLeay' s Horae Entomologicse, Kirby 's Fauna Boreali Ameri- 

 cana, Linnean Transactions, Vol. 12. ; and the works of Stephens, 



