80 BULLETIN 32, UNITED STATES NATIONAL MUSEUM. 



RHADiN.i;A VITTATA Jau,Enicognathus inttalus Jan, Prodrome Icon. G<;u.Opbid. Archiv., 

 p. 1. Zoolojria Modcua, ii, 18()3, March ; Id., Icouogr. G6n. Opliid. livr., 16, pi. ii, 

 fig. 3; Bocourt, Miss. Sci. Mcx.,Rept., p. 630, pi. xli, fig. ] ; Dromicus twniatus 

 Peters, Monatsber. k. Preuss. Akad., 1863, p. 275, June ; Bhadinwa twniata Copo, 

 Journ. Acad. Phila., 1875, p. 139. 

 Mi'xico, Peters. 

 RiiADiNiEA LOKEATA Guntb. Cope, Joum. Acad. Phila., 1863, p. 140; Drumicns loreatua 

 Giinther, Ann. and Mag. Nat. Hist., 1868, p. 419, pi. xix, fig. E. 

 " City of Mexico," Guniher. 

 Rhadin^a fulviceps Cope, Proc. Amer. Philos. Soc, 1885, November, 1886, p. 279. 



Panama, Nelson. 

 Rhadin^a lachkymans Cope, Journ. Acad. Phila., 1875, p. 140 ; Lygophia lachrymana 

 Cope, Proc. Amer. Phil. Soc, 1869, p. 154. 

 Middle "Mexico," Suviichrast. 

 Rhadin^a decorata Giinther, Cope, Proc. Acad. Phila., 1863, p. 101 ; Corondla deco- 

 raia Giinther, Catal. Coll. Snakes, Brit. Mus., 1858, p. 35; Diadophis dccoralus 

 Cope, loc. cit., 1860. 

 Veragua, Mitchill; E. Costa Rica, Gabb ; Nicaragua, Bransford ; Tierra Caliente 

 Sumichrast; Jicaltepec, Vera Cruz, Mision Geogrdfica. 

 Rhadin.ea IGNITA Cope, Journ. Acad. Phila., 1875, p. 140; Dromicus ignitua Cope, 

 Proc. Acad. Phila., 1871, p. 204. 

 Darien, Selfridge. 

 RHADIN.EA VEKMICULATICEPS Cope, Journ. Acad. Phila., 1875, p. 139; Taniophis ver 

 micnJaticeps Cope, Proceeds. Acad. Phila., 1860, p. 249. 

 Veragua, Mitchell; Costa Rica, Van Patten. 

 RHADiNiEA SERPERASTRA Copc, loc. clt., 1871, p. 212 ; Journ. Acad. Phila., 1875, p. 140. 



Costa Rica, Gabb. 

 RHADIN.EA GODMANlGunther; Cope, Journ. Acad. Phila., 1875, p. 139; Dromicua god- 

 mani Gunther, Ann. and Mag. Nat; Hist., 1865, February. 

 Guatemala, Godman. 



Diadophis Baird and Girard.* 



Catal. Serp. N. Amer., 1853, p. 112. 



Diadophis punctatus Linn.,t Baird, Girard; Ablabes punctatus Dum., Bibr., vii, p. 310; 

 Jan.Elenco. 



Subspecies arnyi Kennicott; Diadophis arnyi Kenn., Proc. Acad. Phila., 1859, 



p. 99. 

 Mirador, Vera Cruz, Sartorins ; Guanajuato, Dugh ; Zacualtipan, Bemad. 



Subspecies reoalis Baird, Girard. 

 "Sonora, Graham." 



Trimetopon Cope. 



Proc. Amer. Philos. Soc, 1884, p. 177 ; an Hydromorphus Peters? 



Trimetopon gracile Giinther, Cope, loc. cit. ; Ablabts gracilis Gunther, Ann. and Mag. 

 Nat. Hist., 1872, p. 18. 

 Costa Rica, Giinther. 



* I atone time pLiced the species of Rhadinaea kiio-wn to ine in this genus, as they are very nearly 

 allied, and in this I have been followed by Garman. But they have no scale povos, wliilo there is a 

 single pore on the scales of Diadophis. I cannot therefore unite them. Diadc.pliis is not character- 

 ized by the presence of two preoculars, as supposed by Jan. 



tOf two specimens from Guanajuato one has seven, the other eit;ht superior labials: one has two 

 preoculars, while a specimen from the State of Vera Cruz has but one. 



