EUTAENIA. 147 



spotted, 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 suhcaudal scutellae is black; the 

 posterior half is yellowish. 



Log. — From Singapore. 



Plate XIII, tig. 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. 



Genus EUTAENIA, B. & G. 



Char. gen. — Scutis cepJialicis normalihus. Mire inter duos scutos 

 nasales sita. Scuto p)raeorhitaU uno, vel daohus ; postorhitalihus 

 duohus vel tribus. Squamis carinatis in iiovendecim vel viginti imam 

 series longitudinales dispositis. Scutellis ahdominalibus centum et 

 quadragmta vel centum et septuaginta ; subcaudalibus qidnquaginta 

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

 divisa. Colore obscuro, tribus pallidis longitudinalibus vittis notato; 

 inter quas maculae alternantes vel tessellatae inveiiiimtur. Abdomine 

 unicolor e. 



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. N. Amer. I, 1853, 24 ; and in 3Iarc^'s Expl. 

 Red River of La. 1855, 190. 



