24 PROCEEDINGS OF THE NATIONAL, MUSEUM vol. 68 



Antenna yellow-brown, with 14 segments, pubescent; second seg- 

 ment longer than third; third slightly longer than fourth; segments 

 become longer and broader toward apex; last segment elongate, 

 sub-oval and pointed at apex. 



Pronotum yellow, margins darker, saddle-shaped, with anterior 

 margin strongly raised up, emarginate anteriorly and posteriorly, 

 margins with dense long hairs. 



Legs white with tinge of yellow, pubescent. 



Abdomen dirty gray with tinge of j^ellow, tergites with dense 

 hairs — shorter than those on pronotum. 



Measurements. — 



Length of entire soldier, 4.1^.5 mm. 



Length of head with nasus, 1.35 mm. 



Length of head with mandibles, 1.40 mm. 



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



Length of nasus (to anterior head), 0.45 mm. 



Length of left mandible, 0.55 mm. 



Length of pronotum, 0.30 mm. 



Length hind tibia, 0.77 mm. 



Width of head, 0.90 mm. 



Width of pronotum, 0.50 mm. 



Smaller than most species in the subgenus Annitei^mes {sensu 

 stHctore), near neotenicus Holmgren but smaller and with differences 

 in the relative lengths of the second and third segments of the an- 

 tennae. 



7'ype locality. — Cachuela Esperanza (Beni River), Bolivia. 



Described from a series of soldiers collected together with workers 

 at the type locality in March, 1922, by W. M. Mann. 



Type, soldier.— Q^t. No. 27651, U.S.N.M. 



The following known species of Armitermes were also found : 



ARMITERMES (ARMITERMES) ALBIDUS Hagen 



Cachuela Esperanza (Beni River), Bolivia, March, 1922 (soldiers, 

 workers, and queen — 11.3 mm. in length, 2.8 mm. in width, with 

 elongate white egg — termitophile — placed longitudinally near middle 

 of pronotum) ; {Nasutitermes., soldiers and workers, with above 

 termites). 



Cachuela Esperanza (Beni River), Bolivia, I\Iarch, 1922 (soldiers, 

 workers, and queen — 23 mm. in length, 5 mm. in width, with white 

 eggs of termitophile on mesonotum and first 3 tergites). 



ARMITERMES (ARMITERMES) EUAMIGNATHUS Silvestri 



Ixiamas, Bolivia, December, 1921 (soldiers and workers, a few 

 soldiers and Avorkers of Lcucoferrties tenuis Hagen also present). 



