AKT. 6. NEW SPECIES OF TERMITES SNYDER. 23 



10. Length of head with mandibles 6.5 mm., sides parallel-oval, not markedly hairy, 



entire length 10.5 mm colombianus, new species. 



Length of head with mandibles 9 mm., head narrowed anteriorly. 



silvestri Holmgren. 



Length of head with mandibles 8.27 mm., width of head 4.75-4.96 mm., mandi- 

 bles more curved territus Emerson. '* 



Length of head with mandibles 7 mm bolivianus Holmgren. 



Length of head with mandibles 6.8 mm., head with sides parallel (slightly con- 

 vex), width of head 3.32 mm parallelus Silvestri. 



11. Small, length of head with mandibles 4.7-5.1 mm., entire length 8.9-9.5 



mm.; mandibles relatively weakly incurved, relatively short; but few hairs 



on head molestus Burmeister. 



Larger, length of head with mandibles 5.5-6 mm., entire length 10-11 mm., 

 mandibles strongly incurved, elongate, more hairs on head, head more markedly 

 narrowed anteriorly, thoracic nota with sides produced to longer points. 



braziliensis Holmgren. 



SYNTERMES MAGNOCULUS, new species. 



Winged adult. — Head dark castaneous-brown to black, smooth, 

 shining, with few long hairs on front of head. Fontanelle a large 

 (larger than an ocellus) round depression, yellow-brown in color 

 with a reddish run, located in the center of the head back of the eyes. 



Eye black, large and prominent, elongate and projecting; ocellus 

 elongate, deeply inset with prominent rim, yellowish, separated from 

 eyes by a distance over its long diameter and equal to half the long 

 diameter of an eye. 



Mandibles yellow-brown, elongate but broad at base, extending to 

 tip of labrum (mandibles 2 mm. in length) ; two black, elongate, 

 sharp-pointed marginal teeth at apex. 



Antenna yellow-brown, 20 segments, pubescent; second segment 

 short, cylindrical, longer than fourth which is subclavate; third twice 

 length of fourth; fifth longer than fourth; sixth longer than fifth but 

 not as long as third. 



Labrum yellow-brown, broadest in middle, broadly rounded at 

 apex. 



Post-cljrpeus yellow-brown to light castaneous, slightly darker 

 than labrum, bilobed, not greatly raised up, nearly three times as 

 broad as long. 



Pronotum slightly lighter colored than head, smooth, large, some- 

 what saddle-shaped, not flat, semicircular, turned up anteriorly and 

 turned down posteriorly, not as broad as head, not twice as broad 

 as long, broadly emarginate posteriorly, with hairs on margins; 

 anterior corners subtriangular. Meso and metanota lighter colored 

 than head, angularly (obtuse) emarginate posteriorly. 



Legs yellow-brown, elongate, pubescent. 



Wings white, transparent, costal veins yellow-brown with light 

 yellow area below veins, margins with but few short hairs or cilia, 

 wing surface with a network of minute parallel markings, at right 



'8 The characters of this termite S. territus Emerson MS. are those used by Alfred Emerson in his de- 

 scription and the species should be credited to Emerson. 



