COLEOPTERA. 



By Geo. H. Horn, M. D., Phixadelphia. 



The species collected during the expedition of 1872 are very few ifi 

 number, and add scarcely anything to our knowledge of distribution, 

 and an unusually small number of new forms. They are distributed as 

 follows : 



YELLOWSTONE LAKE. 



GinemcMa 12-guttata, Dej. 

 Garabus Uedatus, Fab. 

 AgahuSj n. sp. 

 Golymhetes Mnotatus, Harr. 

 Gyrinns picipes, Aube. 

 affinis, Aube. 

 SilpJiu lappo7iica, Hbst. 

 GantJion simplex, Lee. 

 BipUtaxis hrevicollis, Lee. 

 Melanophila longipes^ Say. 

 Anclastes clruryi, Kby. 

 Adeloceraprofusa, Cand. 

 Gcelocnemis dilatieollis, Manu. 

 IphfMmus serratus, Mann. 

 TragosomcC harrisii, Lee. 

 Argaleus nitens, Lee. 

 Griocephalus protractus, Lee. 



agrestis, Kby. 

 Maltica Mniarginata, Say. 



TETON BASIN. 



Gicindela montana, Lee. 



Amara poliUi, Lee. 

 gibba, Lee. 

 Harpahis oMitus, Lee. 

 Diplotaxis tristes, Kby. 

 Silis, u. sp. 



Uleodes humeralis, Lee. 

 GanthaHs sphmricoUis^ Say. 



SNAKE EIVER, 



Flatymis deplanatus, Men. 

 Ifothopus zabroides, Lee. 

 Harpahis oblitus, Lee. 

 A^nphizoa lecontsi, Matth, 

 Golymhetes seminiger^ Lee. 



n. sp. 

 Dytiscus confluens, Say. 

 Acmmodera mixta, Lee. 

 Eleodes tricostata, Say. 

 Gantliaris nuttali, Say. 



cyanipennis, Lee. 

 Epicauta. puncticollis, Mann. 



maculata, Say. 

 Ghrysomela pMladelphica, him 



The most interesting of all the species collected is AmpMzoa lecontsi 

 Matthews, described in July, 1872, by Rev. A. Matthews, in a pamphlet 

 issued by E. Janson, of London, entitled " Cistula Entomologica," p. 

 121. It differs from our well-known A. insolens, Lee, by the dorsum of 

 the elytra being depressed along the middle from near the base to the 

 apex, so that each elytron along its middle appears subcostate. Another 

 species has been described by the same author, (p. 119,) but I cannot 

 see any character by which it can be separated from the long series of 

 A. insolens before me. It has been named AmpMzoa Josephi. The two 

 sexes of AmpMzoa do not differ greatly 5 the antennee of the male are 

 very obsoletely subserrate, and the female has a somewhat broader form 

 of body. 



Of the three new species little need be said here. Two are water- 

 beetles, and the family is now in process of revision. The Telephoriile, 

 Silis, will be described, with many other new forms, in a forthcoming 

 review of the entire group. 



It is rather remarkable that no representatives of the families 

 Histeridw, Coccinellidce, and GurcuUonidw appear, and very few Tene- 

 brionidce, although the region has on other occasions yielded many 

 representatives of all these families. 



