42 PROCEEDINGS OP THE NATIONAL. MUSEUM vol. 68 



Worker. — Length of postclypeus nearly one-half its width, in spe- 

 cies aequalis. 



Genotype. — Nasutitermes {Agnathotermes) glaber Snyder from 

 Cachuela Esperanza (Beni River), Bolivia. 



In this subgenus also may be placed N. ( Ohtusitermes ) aequalis 

 Snyder from Camaguey, Cuba and " G onstrictotermes " pallidiceps 

 Banks from Haiti. 



It is believed by the writer that the presence or absence of points 

 on the mandibles is of relatively greater importance in systematic 

 classification than the contour of the head or nasus, but a considera- 

 tion of the latter as well necessitates a new subgenus for this species. 



NASUTITERMES (AGNATHOTERMES) GLABER, new species 



/Soldier. — Head pale yellow, nasus red-brown, head pyriform, 

 constricted back of base of antennae (at anterior quarter of head), 

 broadest posteriorly, slightly convex but nearly straight in profile, 

 with a slight depression at constriction, with scattered very short 

 hairs and a few longer hairs anteriorly and posteriorly. Nasus short, 

 conical, but not very thick, not turned up at tip, with short hairs 

 and longer hairs at apex. Mandibular points absent. 



Antenna pale yellow, 11 segments, pubescent; third segment 

 longer than second or fourth; segments become longer and broader 

 toward apex ; last segment slender and subelliptical. 



Pronotum with margins yellow, saddle-shaped, with short hairs. 



Legs white, fairly elongate, slender, pubescent. 



Abdomen dirty white, with short hairs on tergites, cerci fairly 

 elongate. 



Measurements. — 



Length of entire soldier, 2.70 mm. 



Length of head with nasus, 0.90 - 0.95 mm. 



Length of head without nasus, 0.55 - 0.60 mm. 



Length of nasus, 0.35 mm. 



Length of pronotum, 0.10 mm. 



Length of hind tibia, 0.57 mm. 



Width of head, 0.50 mm. 



Width of pronotum, 0.25 mm. 



This species glaber was first referred to the subgenus Ohtusitermes 

 Snyder (which contains species with two types of soldiers) ; how- 

 ever, only one type of soldier, namely the major ? soldier, was found ; 

 glaber has characters intermediate between the subgenera Convex- 

 itermes Holmgren and Suhulitermes Holmgren. The nasus is short 

 and conical as in C'onvexitermes but the contour of the head is as in 

 Subulitermes. No workers were collected with these soldiers and the 

 species may be a Tenuirostritei^nes or in a new subgenus {Agnatho- 

 termes) ; the points of the mandibles are sometimes lacldng in species 



