730 AFUIPAN l^EPTILRS AXD r.ATKArTri ANS STlvINKOEK. 



Scale rows 17: ^ast I'ostciics 17(>; anal | ; iirostcjics !)S; siii>i'alabial.s S, 

 lourtli and tilth in contact ^itli eye, s('\<'ntli larjicst; infralabials 10, 

 four in contact Avitli antcii(»i' chin sliichl; t('ni])orals 2 -f- o. 



Kostral iioiniaL more than twice as Avidc as liigh, quite visibh- IVoni 

 above; nasal lai<j;(', niucli swollen and IxMit up on the ujtper surface of 

 the jiead. tlie ]u)stril bein»- pierced on the canthus rostralis and quite 

 visibh' troin above, the subnaral suture not reachin.i;' the nostril, ob- 

 lique i)osteri()rly, meetinu the suture betNveeu first and second sujira- 

 labials; internasals almost trianiiular, very small, less than one-third 

 the prefrontals; loreal long and narrow, twice as long as high; a deep 

 furrow from rostral to eye formed by the suture bordering the supra- 

 labials a,bove; iireocular com])aratively small, Just touching the frontal 

 above; frontal long, twice as long as broad, longer than ])refrontals 

 and internasals together, as long as parietals; sui)raoculars large, con- 

 siderably swollen ; two postoculars, ui)per one slightly larger; anterior 

 temi)orals two, long, the upper one particularly narrow, i»ointed ante- 

 riorly and barely reaching the upper postocular; two pairs of chiu 

 shields, the posterior slightly longer. Dorsal scales smooth, with one 

 very distinct apical pore. 



Color above drab, with a broad serrated brown band down the middle 

 of the back almost to the tip of the tail, the bordi^rs and lateral projec- 

 tions being almost black, the adjoining scales, especially anteriorly, 

 pale bulf; a series of blackish spots corresponding to the lateral serra'- 

 of the dorsal band on the scale row nearest to the gastrosteges and 

 urosteges; on the jiosterior half of the body a nnn-e or less distinct 

 line on the thiid row from the grastrostegcs and urosteges; tip of tail 

 nearly unicolored buff; top of head drab, with indistinct marblings of 

 dark brown; a dark-brownish trausocular streak; each of the labials in 

 both jaws Avith an ill-defined dark brownish spot; underside whitish, in- 

 distinctly marbled with dull rufous and marked with ill defined, narrow, 

 longitudinal blackish s])ots: underside of tail densely si»rinkled with 

 grayish. 



Length of head and body, L'oOmm.; lenth of tail, 107mm. 



ReinarLs. — This species is evidently rather closely related to Giin- 

 ther's Coyonclhi nottownia [V. Z. S., 1804, j). .'509, pi. xxvi, fig. 1), which 

 should api)arently stand as lIvmirlKiiicrrhh jiofotaiiia. The dillerence 

 between the two species, as far as it can be made out from the descrip- 

 tion alone, consists in the number and shai)e of tlie anterior tenq)orals 

 and the greater length of the tail in the present si)ecies. The colora- 

 tion appears to be A'ery similar, the chief difierence being that the dorsal 

 band in th(^ present species is serrated all the way and the ])resencein 

 this s])ecies of the spots on the scale row next to the gastrosteges. 

 Many other diflerences might be pointed out were we to accept the details 

 of the scutellation of the head as shown in the figure as absolutely cor- 

 rect in every instance, but that is hardly to be expe<'ted. 



Fiom Uitni)-li(((/nrliis h-llcH, the type of the genus, tht; jnesent 



