2l8 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



in several of the young specimens this dusky marbling is much denser and 

 darker. The upper surface shows the regular pattern of this and related 

 spots, but in one adult specimen the black cross bars show a tendency to 

 fuse into longitudinal bands in the space between the median dorsal pale 

 line and the next one on each side. The three dorsal bands are sharply 

 defined and present in all the specimens. 



Anal pores appear to be entirely absent in this species. 



LlOL^MUS HATCHERI, Sp. nOV. 



Diagnosis. — Sides of neck folded, covered by imbricated, pointed scales, 

 smaller than those on back ; scales on middle of back not larger than those 

 on sides of belly ; ventral scales not larger than dorsals ; lateral scales but 

 slightly smaller than dorsals and, like them, strongly keeled and mucro- 

 nate ; 50-58 scales round the middle of the body ; a distinct patch of 

 enlarged pointed scales on hinder side of thighs ; males with no anal pores ; 

 coloration like L. inagellauiciis and L. lineomaculatus. 



Type. — U. S. Nat. Mus. No. 36,912 ; collected north of Santa Cruz River 

 (?), March or April (?) 1898, by J. B. Hatcher. 



Habitat. — Southern Patagonia : Territory of Santa Cruz. 



This new species is nearly allied to L. magellauicus, L. lineoniaculatus 

 and L. bibroiiii, from all of which it differs in the enlarged scales on the 

 posterior aspect of the thighs. It agrees with the first mentioned and the 

 last mentioned species in the mucronate dorsal scales, but in the number 

 of scales around the body it differs chiefly from L. magcllaniats, which has 

 only 40-44. The coloration is also very similar to that of the latter, and 

 L. liiieoniaculatits, except that the underside is more heavily marbled with 

 blackish. The large specimen which I have selected as type even has the 

 underside solid black and approaches also in the coloration of the upper 

 surface somewhat that of L. kiiigii, with which it was associated in the 

 same jar (No. 2), but the latter has much smaller scales, and hinder side 

 of thighs is uniformly granular. In having the enlarged scales on the 

 posterior aspect of the thigh our new species agrees well with L.Jitaiiigeni, 

 but while the latter has even smaller and less pointed scales than L. 

 kingii, L. Jiatcheri has them much larger and much more pointed. 

 Finally L. hatcheri agrees with L. lineomaculatus only in the male being 

 without anal pores, there being 2 to 3 in L. bibronii, 3 to 5 in L. jnagel- 

 lanicjis, and 6 to 8 in Z. kingii. 



