510 REPORT OF NATIONAL MUSEUM, 1898. 



Eight rows of nuchal scules, with the dorsals, except three or four 

 median rows, smooth; no suprauasal, two postnasals; prefroutala 

 broadly in contact; brown, with a blackish dorsolateral stripe; 

 below yellowish, each scale with a black spot. . G. monticolua Cope. 



Eight rows of nuchal scales, with the lateral dorsal rows smooth; a 

 supranasal, two postnasals; prefrontals separated by interfronto- 

 nasal; olive above, with black vertebral line; sides and lower 

 surfaces black, spotted with greenish white. . G. obsvurun Giinther. 



The distribution of these species is as follows : 



Arctogean Realm. 



medicolumbian region. 



Western subregion. 



GerrTionotua principia Baird and Girard,^ &. bm'nettii Gray, G. multicarinatus Blain- 

 ville. 



Sonoran subregion. 



G. muUicarinatus Blainville, G. Mngii Gray, G. liocephalus Wiegmann, G. nohilis 

 Baird and Girard. 



Toltecan subregion — Orizavau district. 



G. tceniatus Wiegmann, G. deppei Wiegmann, G. gramineus Cope, G. oaxacw Giinther, 

 G. liocephalus Wiegmann. 



Neotropical Realm. 



central american region. 



Guatemalan Plateau. 



G. auritiis Cope, 6f. vasconcelosii Bocourt? G. modest its Cope. 



Costa Rican Plateau. 



G. vionticolus Cope,? G. rhombifer Peters. 



Species of this genus are less active in their movements than those of 

 our Scincidiie and Teiida?. I have observed the G. multicarinatus in its 

 native forests, and found it not difficult of capture. 



GERRHONOTUS GRAMINEUS Cope. 



Gerrhonotus gramineus Cope, Proc. Acad. Nat. Sci. Phila., 1864, p. 179. — GOnther, 

 Biol. Centr.-Amer. Rept., p. 36, pi. xxiv, fig. B. — Boulenger, Cat. Liz. Brit. 

 Mus., 2d ed., II, 1885, p. 2ti9. 



Two pairs supranasals ; theposterior (or prefrontouasals) longitudinal, 

 elongate, nearly equal to prefrontals ; interiiasal smaller than fronto- 

 nasals. Five short supraoculars, embracing three or four smaller scales. 

 Six superciliaries. Eleven supralabials, the eleventh continuous with 

 the swollen posterior temporal scales. Two postnasals, the smaller 

 above the larger; one very large frenal, and one moderate preocular 

 and three suboculars. Six in first, five in second row of infralabials. 

 Muzzle not produced; plates of head thickened and roughened, espe- 

 cially enlarged on the temporal and occipital region. Dorsal scales in 

 twenty-three longitudinal series from nape to base of tail, and in thirteeen 



