1()() riU)CIOKl)lNc;S OV TIIIO national museum vol.01 



Locdlitif irconLs. — l)os('ril)i><l from "Oriznbii/' but doubt is cast 

 ujxtu (bis locality by tbo pi'csiMU'o ol' (wo dilbuvut bibols (iu ibo sanio 

 bauilwril ino) \vi(h (ho (vpo, both s(a(iii<j;; ''Tohuaud'poc''' as (ho lo- 

 oab(y. JSuuiiohras(, (ho oolloo(or, s(a(os (hat "tho typical iiulivi(bials 

 oanio from 'I'uxpauii'o, near Ori/aba'^ {Joe. cit.). 



lu'inarks. — In (ho absiMU'o of \voll-diiroron(ia(otl scale cbaracters in 

 (ho !Li,rouj), color ilid'oroni'cs must bo roliod \\\)0\\ (o ilis(ini2;uisb various 

 ^l)(>ci(>s. 1( is ( ruo (ho (ypo of collarii< has niuo labials, as do hit '/fascia 

 and faaciohifa, bn( (his of itself moans very lidlo, since occasional 

 specimens of upsihui also Inive nine. 1 have considered colhivis dis- 

 (iiu-(. from hit i fascia because (1) (he bands are I'onsiilorably smaller on 

 llu> middorsal lino (l;> scale liMiiidis, maximum), and (he in(ervenin<]:; 

 spaces cover four and one-half (o six scale len<ilhs; anil (2) (here are 

 tlis(inc( head markiniis, incbuliuii; sharj) tli(l'oron(ia(ion oi bead pat- 

 torn fr(Mn nuchal t-oUar, la((er oni'rtiai'hino; upon pario(als, in(oi"ocular 

 liii'ht bar evidcn(, a li<ih( bar oviilont alon<»" in(ernasal and ]>rofrontal 

 suture, and snout white. These characters place i( in (bo sec(ion willi 

 vpsHon. 



Essen(ially (he only ililVoronce between (his and iipsiion is the small 

 numbiM" of blo(chos (1(>) on body. The mininnim in \ipsHon is 23 

 (s[)ecimon from (luadalajara, ,lalisco, type locality). 



This is (he on.ly specimen of (be genus that has over been taken 

 on Atlantic slopes, at least in Mexico. 



TRIMOUrHODON TAH Cope 



Triinovphodon tmi Cow. Vvoc. Amor. Uhilos. See., vol. 11, p. ITvJ, 1S69 ("Tebunn- 

 (opoc." in crroi"). — Sumicuu.vst. Lti Naturalozn, vol. (>. p. 11. 1S82. — Taylor. 

 Kmms. Univ. Soi. KuU.. vol. 25. pp. SGTi-SGG, pi. 85. fig. 2, 15138 (lS)3i)) ; vol. 

 20, pp. 404-477. pi. 51. tig. 8. 1040. 



Pia(pu)sis. — A liii;bt luicbal collar; an iuterocular lijibt bar indi- 

 cated; an indentation posteriorly of black bead cap, but no Y-sbaped 

 bead mark behind frontal. 



iSpt'cinuns ciHWi inaf. — Five. 



Localitij ;rcv)n/.v'.— Quiotopee (U. S. N. Isl. No. 3t)a38, type), San 

 Felipe (KRT-IIMS No. 5507), and Oaxaca (EHT-imS No. 5506), 

 all in the State of Oaxaca; 7 miles east of Cbilpancinjxo, Guerrero 

 (KUT-I1M8 No. 23417); and between ISIorelia and Hidalgo, 

 Micboactiu (E11T-HM8 No. 21402). 



luniarks. — Tbe type locality of tbis species is not Tobuantepec, as 

 stated by Cope, siiico Sumicbrast {Toe. cit.) states, "I found tbe 

 type of tbis species near Quiotepoc. between Tebuacan and Oaxaca.'' 



Tbe primary difference between tau and upsilon is in bead pattern. 

 In tbe former tbe dark bead color is abruptly truncate near tbe 

 posterior tips of the parietals, and a light indentation (broad or nar- 

 row) is visible along the parietal siuuro. In upsiJon the dark head 



