1901.] NATURAL SCIENCES OF PHILA DELPiriA. 43 



Tropidoclonium lineatum Ilallowell. 



Microps Uncatus Hall., Proc. Acad. Phila., 1850,241 ; T. lineatum Cope, 

 I. c, 6Q6, and Kep. Nat. Mus., 1011; Ischnognathus lineatus Boul., 

 I. c, I, 289. 



Head plates normal; oculars 1-2; temporals 1-2 (1); upper 

 labials 5 or G ; scales in 19 rows, tlie two outer only faintly keeled; 

 ventrals 138-148 ; suhcaudals 34-37. Length 350 ram. (tail 48). 



Grayish brown w^'th a light vertebral stripe, bordered by a ro^v 

 of black dots; a light lateral stripe on the second and third rows; 

 belly light with two longitudinal series of black spots, more distinct 

 posteriorly. 



Hab. — Ohio to northei'u Texas. 



AMPHIARDIS Cope. 



Proc. U. S. Nat. Mus., 1888, 391 ; I. c, 67o, and Rep. Nat. Mus., 1008 ; 

 Boul., I. c, I, 290. 



Maxillary teeth smooth, equal; one loreal; two nasals; two 

 internasals; no preocular, the loreal extending to the eye; scales 

 keeled; anal divided; size small; body rather stout; head not 

 distinct; tail short. 



Hab. — Texas. 



Amphiardis inornatus Garman. 



Virginia iiiornntu Garm., No. Am. Kept., 97 (1883) ; A. inornatus Cope, 

 I. c, 675, and Eep. Nat. Mus., 1009 ; Boul., I. c, 1, 290. 



Head scales normal ; two internasals; two nasals; no preocular; 

 loreal long, and ^vitli the prefrontals, entering the orbit; one post- 

 ocular; upper labials 5; temporals 1-1; scales in 17 rows, lus- 

 trous, the outer only faintly keeled; ventrals 125-129; subcaudals 

 36. Length 260 mm. (tail 45). 



Brownish olive above; belly white, base of ventrals dusky. 



Hab. — Two specimens known, only from central Texas 



HALDEA B. and G. 



I. c, 122 ; Cope, I. c, G75, and Rep. Nat. Mus., 1009 ; Boul., I. c, 1, 

 290. 



Maxillary teeth smooth, subequal; one loreal; two nasals; one 

 internasal; no preocular; scales keeled without pits; anal divided; 

 size small, body slender, head distinct, tail short. 



Hab. — North America. 



