EUTAENIA. 147 



spotter], with a tendency of the spots to appear upon every other scu- 

 tella only. As they approximate the neck, under which these spots 

 increase, they cover two scutellae, leaving two unicolor ones inter- 

 vening. The anterior half of the subcaudal scutellae is black ; the 

 posterior half is yellowish. 



Loc. From Singapore. 



Plate XIII, fig. 1, represents Tropidonotus junceus, size of life. 



Fig. 2, is a side view of the head. 



Fig. 3, an upper view of the head. 



Fig. 4, the head, seen from beneath. 



Fig. 5, represents the dorsal scales. 



Fig. 6, the vent and surrounding scutellae. 



GEXUS EUTAENIA, B. & G. 



CHAR. GEN*. Scutis cephalicis normalibus. Nare inter duos sciitos 

 /'it-sales sita. Scuto prae.orbitali uno, vel duobus ; postorbitalibus 

 duoljm vel tribus. Squamis carinati* in novendtcim vd viyiutt unam 

 series long it ud incites dispositis. Scutellis abdominulibus centum et 

 quadrayinta vel centum et septuayinta ; subcaudalibus quinquayinta 

 vel centum et viyinti, in duplicem seriem ordinatis. Scutella praeanali 

 dirisa. Colo re obscure, tribus pallidis longitudinalibus vittis notato; 

 inter quas maculae alternantes vel tessellatae inteniuntur. Abdomine 

 unicolore. 



GEN. CHAR. Cephalic plates normal. Nostrils between two plates. 

 One or two anteorbitals ; two or three postorbitals. Scales cari- 

 nated, constituting nineteen or twenty longitudinal series. Preanal 

 scutella entire ; subcaudal scutellae disposed upon a double series. 

 Abdominal scutellae one hundred and forty to one hundred and 

 seventy ; subcaudals fifty to one hundred and twenty. General 

 color, three light stripes on a darker ground ; intervals with alter- 

 nating or tessellated spots. Abdomen without square blotches. 



SYN. Eutaenia, B. & G. Catal. Kept. X. Amer. I, 1853, '24 ; and in Afarcy'x Expl. 

 Red River of La. 1855, 190. 



