44 PROCEEDINGS OF THE NATIONAL MUSEUM vol. G8 



Described from a series of soldiers and workers collected by W. 

 M. Mann at the type locality. 



Ty^e, soldier.— C^t. No. 27661 U.S.N.M. 



Subgenus Constrictotermes Holmgren 



This subgenus of the genus N asutitermes Banks was established 

 in 1909 by Holmgren to include all species where the nasuti had con- 

 stricted heads. In 1912, Holmgren restricted the subgenus to in- 

 clude only three American species with nasuti with markedly con- 

 stricted heads — some of the most striking species of N asutitermes. 



The species found in Bolivia by Doctor Mann, namely, N. (C.) 

 cavifrons Holmgren, was from a lobed nest on a tree; many other 

 nests, apparently of this species, were nearby. 



NASUTITERMES (CONSTRICTOTERMES) CAVIFRONS Holmgren 



Ivon, Bolivia, February, 1922, queen, nasuti, workers. 



NASUTITERMES (CONSTRICTOTERMES) CYPHERGASTER Silvestri 



Soldier. — Head light castaneous-brown, dark brown to blackish 

 posteriorly and at anterior of basal portion of posterior, wider, lobe 

 of head at point of constriction ; front of nasus also black ; few long 

 hairs on head. 



Antenna light yellow, 14 segments, pubescent; third segment 

 longer than second (but not twice as long) ; third and fourth seg- 

 ments about same length ; fifth longer than third or fourth segments. 



Pronotum light yellow, saddle-shaped. 



Legs Avith tibiae yellow, elongate, slender, pubescent. 



Abdomen gray-white with tinge of yellow, with long hairs on 

 segments. 



Measurements. — 



Length of entire soldier, 4.S0 mm. 



Length of head with nasus, 1.85-1.90 mm. 



Length of head without nasus (to anterior), 1.35 mm. 



Length of nasus, 0.60 mm. 



Length of antennae, 2.40 + mm. 



Length of pronotum, 0.30 mm. 



Length of hind tibia, 1.80-2.0 mm. 



Width of head, 1.25 mm. 



Width of pronotum, 0.C4 mm. 



The description is based on soldiers among Sorensen's material 

 under the manuscript name '"'' reinhardii'^'' at the Museum of Com- 

 parative Zoology, Cambridge, Mass. By a comparison with Silves- 

 tri's description of cyphergaster (1903), I find that these species 

 are identical. Hence, Constrictotermes cyphergaster Silvestri would 

 replace reinhardii Sorensen, if the latter had been described. I 



