ART. 14 TERMITES FEOM AMAZON BASIN SNYDEB 37 



Antenna castaneoiis-brown, elongate, 14 segments, slender pu- 

 bescent; third segment clavate, nearly three times as long as second 

 segment; fourth more than half as long as third; fifth subequal 

 to fourth. 



Pronotum lighter castaneous colored on margins than head, 

 saddle-shaped, with long hairs. 



Legs yellow-brown, elongate, slender. 



Abdomen yellow-brown (lighter colored than in iV. (F.) heterop- 

 ierus), two rows of long hairs on tergites, dense long hairs at end 

 of abdomen. 



Measurements {7)iajor soldier). — 



Length of entire soldier, 3.90—4.20 mm. 



Leugtla of head with nasus, 1.75-1.80 mm. 



Length of head without nasus to anterior, 1.20-1.30 mm. 



Length of nasus, 0.60-0.65 mm. 



Length of pronotum, 0.20 mm. 



Length of hind tibia, 1.50-1.55 mm. ^ 



Width of head, 0.95-1.07 mm. 



Width of pronotum, 0.50 mm. 



Head larger and darker colored than in N. (V.) heteropterus., with 

 only 2 rows of bristles. 



One .soldier of tliis type ? is smaller and the head has a more elon- 

 gate appearance ; it is less wide at the base. 



Measurements. — 



Length of entire soldier, 3.85 mm. 



Length of head with nasus, 1.60 mm. 



Length of head without nasus to anterior, 1.20 mm. 



Length of nasus, 0.50 mm. 



Length of pronotum, 0.20 mm. 



Length of hind tibia, 1.50 mm. 



Width of head, 0.80 mm. 



Width of pronotum, 0.47 mm^ 



Soldier., Intermediate. — Head of same color and with same bristles 

 as major soldier, no wider posteriorly than anteriorly, constricted 

 (pi. 3, figs. 3-4). Antenna 13-14 segments; third and fourth seg- 

 ments clavate, longer than second ; second two-thirds as long as third ; 

 fourth not as long as third. 



Measurements {intermediate soldier) . — 



Length of entire soldier, 3.8-4.1 mm. 



Length of head with nasus, 1.45-1.55 mm. 



Length of head without nasus to anterior, 1.10-1.20 mm. 



Length of nasus, 0.45-0.55 mm. 



Length of pronotum, 0.20 mm. 



Length of hind tibia, 1.50-1.70 mm. 



Width of head, 0.65-0.70 mm. 



Width of pronotum, 0.50-0.55 mm. 



