TRIMERESURUS 



289 



last 5 subequal in size; a lai'ge, narrow, semicircular subocular 

 touching third labial, separated from others by a single row of 

 enlarged scales; 3 preoculars, the 

 middle and lower forming the 

 upper and lower borders of pit, 

 upper largest, all entering eye; 3 

 postoculars, lower temporal scales 

 larger than upper, no trace of 

 keels present; 11 to 12 lower 

 labials ; mental triangular, pointed 

 behind chin shields, in contact 

 with 3 labials; body scales nar- 

 row, pointed sharply behind, 

 faintly keeled on the 8 median 

 rows, in 21 rows around body ; 25 

 about neck; ventrals, 180; sub- 

 caudals, 69; anal single. 



Color in alcohol. — Above ultra- 

 marine blue with a series of about 

 54 irregular brown spots on back ; 

 head reticulated with brown; 

 laterally with a series of yel- 

 lowish, small spots, usually con- 

 nected, intermixed with brownish, 

 involving edges of some ventrals 

 and some scales of the second 

 below greenish blue, the 



row; 



Fig. 32. Triniere&uru^ flavoiaacidatus 



(Gray) ; after Boulenger's Lachesis fill' 

 voinactdatus; a, head, doraal view; b» 

 head, lateral view. 



ventrals edged with whitish; 



chin with numerous white or 



bluish white scales, forming a light spot at angle of jaws; tail 



variegated with bluish and lavender-brown, lighter toward tip; 



lateral spots of yellow and brown on ventral part of tail; skin 



between scales brownish; eye moderate, the length equal to its 



distance from mouth. 



MeasureTnents of Trimeresurus flavoinaculaivs {Gray}. 



Total length 

 Snout to vent 

 Tail 



mm. 



855 

 712 

 143 



Variation. — Specimens I have examined in the Bureau of 

 Science collection, and those of Santo Tomas University, have the 

 following variation in scalation : Ventrals, 171 to 182, average, 

 178; subcaudals, 56 to 69, average, 63. Boulenger records the 



161466 19 



