384 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 | 
1 
E] Sabino, nr. Uruapan, Michoacan; No. 4613, Cuernavaca, Morelos; | 
No. 5366, Ocotito, Guerrero; No. 23627, Tierra Colorada, Guerrero. 
Diagnosis.—Subcaudals usually black- -edged, but not always (about | | 
65 percent) ; a distinct dark (black) area in temporal region, much 
darker than any other part of head, darker than general tone of 
body anteriorly; entire border, anterior as well as posterior, of mid- 
dorsal scales black, a small central area blue or yellow. 
Description of holotype-——Nine supralabials, fourth and fifth en- 
tering orbit; 9-10 infralabials; ventrals 146; anal divided; tail in- 
complete. 
Anterior part of head (in front of frontal) light brown, posterior | 
part bluish; a large dark brown spot including temporal region, | 
upper part of posterior supralabials, sides of parietals, and most of | 
supraoculars; body black, with a light spot in the center of each 
scale; anterior spots blue, and with a small yellow center, posterior | 
spots mostly yellow; light spots not reaching anterior border of 
scales except on lateral anterior scales, on all others restricted to 
centers of scales by a complete black border; a dark line, dimmer | 
toward venter, marking each ventral suture; similar lines, but better 
defined, marking subcaudal sutures. | 
Specimens examined.—Besides the type series (16), 17 (discolored. 
by formalin) frem the vicinity of Tehuantepec, Oaxaca. 
Range.—Pacifie slopes, southern Sinaloa to the region about Tehuan- 
tepec; does not reach Tonala, Chiapas. 
7.—NOTES ON MEXICAN IMANTODES 
Specimens of /mantodes in the Museum of Comparative Zoology, 
United States National Museum, and the E. H. Taylor—H. M. Smith 
collection, examined in preparation for a checklist and key to Mex- 
ican snakes, do not conform with current nomenclature. A number 
of changes appear necessary, and so that at least some of those 
which involve Mexican species may be available for citation, the fol- 
lowing arrangement is presented. 
IT am much indebted to Dr. E. R. Dunn for very generous assistance 
and the benefit of his observations on Central American Jmantodes, 
to Arthur Loveridge for the loan of specimens in the Museum of 
Comparative Zoology, and especially to Dr. E. H. Taylor for 
loan of specimens and for the photographs here reproduced. 
IMANTODES CENCHOA LEUCOMELAS Cope 
PLATE 37, FIGURE 1. 
Himantodes leucomelas Corr, Proc. Acad. Nat. Sci. Philadelphia, 1861, p. 296 
(Mirador, Veracruz; U.S.N.M. Nos. 25085-25036. ) 
Dipsas cenchoa rhombeata MUtieEr, Verh. Naturf. Ges. Basel, vol. 7, p. 151, 1882 
(Guatemala). 
