ABT, 14 TERMITES FROM AMAZON BASIN SNYDER 41 



Measurements {7najor soldier). — 



Length of entire soldier, 3.7-4.0 mm. 



Length of head with nasus, 1.60—1.65 mm. 



Length of head without nasus (to anterior), 1.00 mm. 



Length of nasus, 0.65 mm. 



Length of pronotum, 0.20 mm. 



Length of hind tibia, 1.60-1.65 mm. 



Width of head, 0.80-0.85 mm. 



Width of pronotum, 0.50 mm. 



This caste seems to be more common than the minor soldier. 



Minor soldier (pi. 3, figs. 11-12). — Head dark castaneous-brown to 

 blackish, narrowed more anteriorly than major soldier, same bris- 

 tles ; in general the same shape. Antenna 14 segments ; third longer 

 than second or fourth; from fifth to tenth, segments become elon- 

 gate ; from eleventh to fourteenth, shorter. 



Measuretnents {minor soldier). — 



Length of entire soldier, 3.35-3.6 mm. 



Length of head with nasus. 1.45—1.50 mm. 



Length of head without nasus (to anterior), 0.90 mm. 



Length of nasus, 0.60 mm. 



Length of pronotum, 0.15 mm. 



Length of hind tibia, 1.45 mm. 



Width of head, 0.70 mm. 



Width of pronotum, 0.40 mm. 



Minor soldier darker colored than heebei Emerson where there 

 are only two rows of bristles on head and 13 segments to the an- 

 tenna; in antillarum Holmgren there are also only 13 segments to 

 the antenna. 



The post clypeus of the worker is nearly as long as half its 

 breadth. 



Type locality. — Kosario, Bolivia. 



Described from a single winged male adult and a series of dimor- 

 phic soldiers found together with workers in " termite hills " at the 

 type locality, in November, 1921, by W. M. Mann. A series of 

 winged adults together with dimorphic soldiers and with workers 

 were also collected at Keyes, Bolivia, in October, 1921, by Mann. 

 One soldier of Armitermes {Curvitermes) odontognathus Silves- 

 toni was found with these specimens. 



Type, winged male adult.— C^t. No. 27G59, U.S.N.M., morpho- 

 types soldiers. 



Subgenus Agnathotermes, new subgenus 



Soldier. — Of only one type, contour of the head as in the sub- 

 genera Tenuirostriterm.es Holmgren or Suhulitermes Holmgren, 

 mandibles without points, nasus short and conical as in the subgenus 

 Convexitermes Holmgren. Antenna with 11-12 segments. Light- 

 colored species. 



60730—26 4 



