2 Unircrsity of Michirjan 



1908 Trohidoiiotiis sipcdoii fasciatus Streckcr, Proc. Biol. Soc, Wash- 

 ington, vol. 21, p. 50; same, pp. 69, 76; Baylor Bull., vol. 18, 

 no. 4. 1915, p. 28. 



191 1 Xatrix fasc'.ata Hurler, Trans. Acad. Sci., St. Louis, vol. 20, 

 no. 5, p. 154. 



Diagnosis : Similar in scutellation and proportions to Ma- 

 trix fasciata fascia fa (Linnaeus), but with the dorsal saddles 

 very much larger and only about half as numerous, and with 

 average differences as shown in the table, page 5. 



Range : Eastern Louisiana north through southern and east- 

 ern Arkansas to southeastern ^lissouri, and west in Texas to 

 about the 98th meridian (See map, page 7). 



Type specimen : Museiun of Zoology. L'niversity of Mich- 

 igan, number ^77^7 ! i^utler County. ]^Iissouri. April 16, 1905 ; 

 J. Hurter, collector. 



Description of type specimen : Ventral plates, 135 ; anal plate 

 divided; caudal plates 70, all divided; dorsal scale rows, 21 on 

 the anterior portion of the body, changing to 23 (on the left 

 side at the level of the 30th ventral plate. l)y addition, appar- 

 ently, of a 5th row. and on the right side at the level of the 

 33rd ventral scute, by addition, apparently, of a 6th row), 

 then to 21 (on the left side at the level of the 67th ventral, 

 and on the right side at the level of the r)3rd ventral, l)y loss 

 of the 5th row. apparently in each cascj. then to 19. and to- 

 wards the posterior end to 17, the full formula being, there- 

 fore, 21-23-21-19-17; upper labials 8 on each side; lower 

 labials. 10 on each side; i preocular; 3 postoculars, the lowest 

 of which is on each side much the smallest; a single anterior 

 temporal on each side, followed by 3 posterior temporals ; pos- 

 terior chin shields a little longer than the anterior, separated 

 anteriorlv bv about the width of one small scale and diverging 



