396 PROCEEDINGS OF THE NATIONAL MUSEUM ». 88 



the scales (the original scales lost) ; ventrals 132; anal entire: caudals 

 54, divided, excluding the terminal spine ; male. 



The specimen has lost all its original scales; the ground color of 

 the back is now light slate-gray; a narrow dark line originating at 

 the posterior margin of the orbit passes posteriorly along the suture 

 between the parietal and fifth supralabial (most of the stripe on the 

 labial) and continues down the sides of the body on the third and 

 fourth scale rows; it disappears completely just before reaching the 

 anus ; a median light line is very dimly visible, apparently occupying 

 but one scale row posteriorly, wider on the neck ; at present the stripe 

 cannot be discerned on the tail. 



Mental and gular region cream ; dorsal color encroaching on edges 

 of ventrals, which are otherwise gray-cream; the extreme anterior 

 edge of each ventral is black, the color concealed beneath the posterior 

 edge of the preceding ventral ; the extreme anterior edges of most of 

 the dorsals are black, particularly on the scales of the first and second 

 rows ; ventral surface of tail somewhat more cream-colored than belly. 



Length of head, parietal to rostral, 8.5 mm.; total length, 252 

 mm. ; tail, 53 mm. 



The specimen is in excellent condition except for the loss of the 

 original scales and a slight injury in the mental region. 



♦ADELPHICOS QUADRIVIRGATUS SARGII (Fischer) 



The Museum has four 1 from Mexico, three (Nos. 46612, 46614-5) 

 definitely from Chicharras, Chiapas, and one other (No. 46514) prob- 

 ably from that locality. 



ADELPHICOS QUADRIVIRGATUS VISONINUS (Cope) 



AdelpJiicos quadrivirgatus visoninus Smith, Proc. Rochester Acad. Sci., vol. 8, 

 pp. 186-1S8, figs. 2, 6 (map), 19-12. 



A single specimen (No. 109706) was found near Palenque, Chiapas, 

 in a rotten log. 

 The Musemn has no others from Mexico. 



*AGKISTRODON BILINEATUS Gunther 



The Museum has seven specimens, from Maria Madre Island, Tres 

 Marias Islands (No. 24685) 2 ; Tehuantepec, Oaxaca (No. 30492) ; Los 

 Reyes, Michoacan (No. 46416); and "Mexico" (Nos. 32214, 84055, 

 85093-4) . 



1 Smith, 1942c, pp. 192-195, figs. 4 (ventral head srales), 6 (map). 



2 Stejneger, 1899, p. 71. 



