34 PROCEEDINGS OP THE NATIONAL MUSEUM vol. 68 



NASUTITERMES (CONVEXITERMES) PALLIDUS, new species 



Soldier. — Head, light yellow, straw-colored, nasus reddish-brown, 

 profile of head convex, broadest posteriorly, where margin is 

 rounded, gradually narrowed anteriorly, nasus conical and robust, 

 head with dense long hairs, nasus with dense short hairs. Man- 

 dibles with no sharp points. 



Antenna light yellow, 11 segments, pubescent; third segment 

 shorter than second or fourth segments; segments after the fourth 

 become longer and broader. 



Pronotum white with tinge of yellow, saddle-shaped, about one 

 third as long as broad, with long hairs at margins. 



Legs white, with tinge of yellow, not very long, pubescent. 



Abdomen dirt}^ gray, with tinge of A^ellow, with dense short hairs 

 and longer hairs at base of tergites. 



Measurements. — 



Length of entire soldiei*. 2.45-2.75 mm. 



Length of head with nasus, 1.00 mm. 



Length of head without nasus (to anterior), 0.60 mm. 



Lengtli of nasus, 0.40 mm. 



Length of pronotum. 0.10 mm. 



Lengtii of hind tibia, 0.47 mm. 



Width of head, 0.60 mm. 



Width of pronotum, 0.30 mm. 



N. (0.) palUdus is smaller and has a narrower head than nigri- 

 comis Holmgren and convexifrons Holmgren, convexifrons has not 

 the dense long bristles on the head; it is lighter colored and has 

 a broader head than kartdboensis Emerson; pallidus is lighter col- 

 ored and has a narrower head than rtianni Emerson, where there are 

 no long dense bristles on the head; it is lighter colored and has a 

 broader head than viazai^iniensls Emerson and has a more robust 

 nasus, the length of the head to the anterior in mazaruniensis is 

 longer than in 'pallidus. 



Type locality. — Ivon, Bolivia. 



Described from a large series of soldiers and workers collected at 

 the type locality in February, 1922, by W. M. Mann. Other speci- 

 mens collected at Cachuela Esperanza (Beni River) in March. 



Type, soldier.— Cat No. 27656, U.S.N.M. 



NASUTITERMES (CONVEXITERMES) PULLICEPS, new species 



Soldier. — Head dark castaneous-brown, base of nasus darker 

 (blackish-brown), apex lighter with reddish tinge, broadly oval, 

 convex in profile, with few scattered long hairs and dense shorter 

 hairs. Nasus fairly elongate, conical but not very thick even at 

 base, with hairs at apex. 



