. Bulletin. Science; Natural history; Natural history. 44 BULLETIN SOUTHERN CALIFORNIA ACADEMY OF SCIENCES VOLUME 75. Figure 3. Lateral, dorsal, and ventral views of head of BMNH from the Magdalena Valley, Colombia. Zulia and two from the Distrito Federal. In addi- tion, the syntypes of Homalocranion Uneatum Fischer came from Maracaibo, Est. Zulia. This name is a synonym of T. semicincta, according to Boulenger (1896), but I have been unable to ex- amine the specimens. I have examined only one of these specimens (USNM 107324) from near Cara- cas, which differs in some respects fro
. Bulletin. Science; Natural history; Natural history. 44 BULLETIN SOUTHERN CALIFORNIA ACADEMY OF SCIENCES VOLUME 75. Figure 3. Lateral, dorsal, and ventral views of head of BMNH from the Magdalena Valley, Colombia. Zulia and two from the Distrito Federal. In addi- tion, the syntypes of Homalocranion Uneatum Fischer came from Maracaibo, Est. Zulia. This name is a synonym of T. semicincta, according to Boulenger (1896), but I have been unable to ex- amine the specimens. I have examined only one of these specimens (USNM 107324) from near Cara- cas, which differs in some respects from speci- mens I have examined from Colombia. In comparison with Colombian specimens, USNM 107324 has well-defined dark crossbands (Fig. 2B) that are separated by pale bands about six scales in length (1 to 3 in Colombian specimens). The number of dark tail bands is 3, which is much lower than the number in Colombian speci- mens (4-13, x = ). Also, the nuchal band is longer, occupying half of the parietals and one and one-half dorsal scales (as opposed to a max- imum size of one-third of the parietals and one dorsal scale in Colombian specimens). This speci- men, however, shows no scutellational distinctions compared to Colombian material. Although USNM 107324 is distinctive in a number of features, I think it premature to con- sider recognizing it nomenclaturally until the other specimens from Venezuela are examined (the three syntypes of Homalocranion Uneatum are all of the striped phase and their description by Fischer, 1883, corresponds well to that of Colombian material of the striped phase) and until additional material from the entire range of the species becomes available. Accordingly, I will consider for the present that the Caracas population is conspecific with the populations to the west and present the following taxonomic summary. TantiUa semicincta (Dumeril, Bibron, and Dumeril) Homalocranion semi-cinctum Dumeril, Bibron, and Dumeril, 1854: 862; Jan, 1862: 53; J
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