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Show 1897.] LIZARDS OF THE GENUS SCELOPORUS. 497 d- Omilteme, Guerrero. Smith (1) d« >> » " O - u » ii • •• d d d 2 0 6 d 5 11 J! II >> I) II II II 11 •" I) II >! 11 11 11 *•" Amula, Guerrero. Smith (2) ... Jalapa. Hoege S. Mexico. Godman (3) Hac. Bosa de Jericho, Nicaragua. Rothschuh. d. Bebedero, Costa Bica. Underwood. 1. 82 .72 66 61 58 56 72 63 64 71 59 83 73 68 2. 17 15 14 13 13 12 14 13 13 14 13 17 15 14 3. 19 17 15 15 15 14 16 14 15 16 14 20 17 16 4. 18 16 14 14 14 13 15 14 14 14 13 19 16 14 5. 22 21 19 17 18 17 19 18 18 19 18 23 21 20 6. 27 29 32 29 31 30 30 29 30 28 27 26 29 29 7. 7 7 7 7 8 8 7 7 7 6 7 6 6 7 8. 36 40 36 35 36 36 36 38 38 36 38 36 36 36 9. 15-15 15-15 16-16 14-15 15-16 14-14 16-16 16-15 14-15 14-15 14-14 16-17 14-14 14-13 (1) The specimens from Omilteme have been referred by Giinther to 8. viviparus. (2) This specimen has been referred by Giinther to 8. spinosus. (3) The specimens from S. Mexico have been referred by Giinther to S. torquatus. Males green or dark olive above, the dorsal scales often black at the sides ; head dark olive above, uniform or with pale green spots ; a black collar, continuous or broadly interrupted between the shoulders, and extending across the throat. Lower surface of head and body dark blue, uniform or with tbe breast and the middle line of the belly yellowish white or pale bluish green ; the light ventral stripe edged with black. In some of the specimens from Omilteme the throat is bluish white with oblique blue stripes converging backwards. Eemales olive or olive-brown above, spotted with black, or wdth more or less regular black wavy cross-bands ; black collar ill-defined or reduced to a bar in front of the shoulder, not extending across the throat. Lower parts yellowish white, throat bluish green. This species is very closely allied to S. spinosus, from which it differs in the stronger mucronation and denticulation of the dorsal scales. The type specimens came from St. Agustin, W . slope of Atitlan, Guatemala, 2000 ft. The specimens which I refer to the same species are from Jalapa, Omilteme, and Amula, South Mexico, Hacienda Bosa de Jericho in Nicaragua, 3250 ft., and Bebedero in Costa Eica. 12. SCELOPORUS ASPER, sp. n. (Plate XXXIII.) Head-shields smooth ; frontal transversely divided, the anterior moiety often longitudinally bisected, in contact with the interparietal or narrowly separated from the latter by the frontoparietals ; interparietal as long as broad or a little broader than long, much larger than the parietals; a series of four transversely |