36 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



nelle hyaline, triangular, broader than in {Velocitermes) heterop- 

 terus Silvestri, also the lines of bifurcation at anterior are shorter. 



Antenna light castaneous-brown (12 (+ ?) segments, pubescent; 

 third segment slightly darker colored, clavate, elongate as in {Veloci- 

 termes)^ as long as fourth and fifth segments together; fourth seg- 

 ment slightly longer than second. 



Eyes blackish, fairly large and projecting. Ocelli hyaline, promi- 

 nent, separated from compound eyes by a distance fully equal to 

 their long diameter. 



Labrum white with brownish tinge in center, tongue-shaped; 

 darker colored than in N. {V.) heteropterus. 



Post-clypeus light castaneous-brown, bilobed, projecting, three 

 times as broad as long. 



Pronotum darker castaneous-brown than post-clypeus, slightly 

 raised anteriorly, also slightly emarginate anteriorly and poste- 

 riorly, sides slope sharply to posterior margin, which is fairly 

 straight not rounded as in N. {!).) diversimiles, with long hairs; 

 meso- and meta-nota lighter in color than pronotum, more elongate 

 than in diversimiles, deeply, angularly emarginate posteriorly. 



Legs yellow-brown; elongate, slender, pubescent; two elongate 

 white eggs of a beetle (termitophile?) in ventral axis between tibia 

 and femora of left prothoracic leg and one in joint on right fore leg. 



Abdomen with tergites same color as meso- and meta-nota, with 

 dense long hairs; sternites lighter colored, with golden-yellow tinge 

 in center, with dense long hairs; abdomen with dense short hairs 

 laterally. 



Measurements. — 



Length of queen, 16.0 mm. 



Length of head (to tip labrum), 1.45 ram. 



Length of pronotum, 0.80 mm. 



Length of hind tibia, 2.15 mm. 



Diameter of eye, 0.34 mm. 



Width of head (at eye), 1.40 mm. 



Width of pronotum, 1.30 mm. 



Width of abdomen of queen, 3.S mm. 



N. {D.) melanoeefhalus is darker colored and has smaller eyes and 

 shorter pronotum than N. {Velocitermes) heteropterus. 



Soldier, major. — Head dark castaneous-brown to blackish, pos- 

 terior and sides of posterior lobe of head lighter colored, as is base 

 of antennae; tip of nasus light castaneous; head nasuate, semipear- 

 shaped, not so constricted as heteropterus, unlike in Diversitermes 

 where widest anteriorly, much wider posteriorly than anteriorly; 

 only two rows of bristles on top of head at base of nasus and on 

 apex of posterior lobe of head, three rows of bristles in N. (F.) 

 heteroptetnis where there is an intermediate row (pi. 3, figs. 1-2). 



