. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 202 Bulletin Museum of Comparative Zoology, Vol. 158, No. 5 pects of color pattern and body form. See Table 2 and Cadle (2005, table 1). Description Size and Scutellation. Tables 1 and 2 summarize taxonomic data for Sibynomor- phus oligozonatus. Largest male 446 mm total length (330 mm SVL). Largest female 550 mm total length (428 mm SVL). Body somewhat compressed. Tail 24—26% of to- tal length in three males, 22% in one fe- male. Ventrals 145 (two males) to 163 (third known male), 177 in a female; ven- trals
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 202 Bulletin Museum of Comparative Zoology, Vol. 158, No. 5 pects of color pattern and body form. See Table 2 and Cadle (2005, table 1). Description Size and Scutellation. Tables 1 and 2 summarize taxonomic data for Sibynomor- phus oligozonatus. Largest male 446 mm total length (330 mm SVL). Largest female 550 mm total length (428 mm SVL). Body somewhat compressed. Tail 24—26% of to- tal length in three males, 22% in one fe- male. Ventrals 145 (two males) to 163 (third known male), 177 in a female; ven- trals preceded by one or two preventrals. Anal single. Subcaudals 66—68 in males, 66 in one female. Loreal and prefrontal bor- dering anterior edge of eye (no separate preocular) (Fig. 3); loreal longer than tall. Postoculars 2 or 3, primary temporals 2, secondary temporals 3 or 4, tertiary tem- porals (when discrete) 3. Supralabials most commonly 6 (3—4 bordering eye); other patterns 7 (3-4) or 7 (4-5). Infralabials 10 (9 on one side in the holotype). Chin shields in pairs. Maxillary teeth 12— 15 (N = 4). As far as can be discerned with only four specimens, Sibynomorphus oligozonatus shows typical colubrid patterns of sexual dimorphism in size (female larger), ventral counts (female greater), and relative tail length (male longer). Despite the differ- ence in relative tail length, subcaudal counts do not differ between the males and the female. Statistical tests were not performed on these comparisons because only four specimens are known. Color in Life. Orces and Almendariz (1989) described the color of the holotype as follows (paraphrased): "Diffuse dark brown spots on the top and sides of the head. Dark brown bands on the anterior part of the body four scales wide, narrow- ing to one scale wide on the posterior body. Interspaces anteriorly pale brown, becoming grayish at midbody. Venter whit- ish, finely speckled with brown posterior- ; Charles W. Myer
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