AKT. 14 TERMITES FROM AMAZON BASIN SNYDER 33 



NASUTITERMES (NASUTITERMES) SURINAMENSIS Holmgren 



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

 and workers) ; Ixiamas, Bolivia, December, 1921 (soldiers and work- 

 ers) ; Reyes, Bolivia, October, 1921 (soldiers and workers). 



NASUTITERMES (SUBULITERMES) ANGUSTICEPS, new species 



Soldier. — Head yellow, lighter anteriorly, nasus castaneous, pear- 

 shaped, with only two rows of bristles, one row near anterior, other 

 near posterior of head, also with dense short hairs; nasus elongate, 

 slender, slightly turned up at apex (dorsally). Points of mandibles 

 absent. 



Antenna white with tinge of yellow, 12 segments, pubescent. First 

 segment elongate, cylindrical ; second shorter ; third subclavate, nar- 

 rower and slightly shorter than second; fourth broader and longer 

 than third; last segment elongate, sub-elliptical. 



Pronotum white with tinge of yellow; yellow-brown at anterior 

 margin, saddle-shaped, anterior margin with long hairs. 

 ^ Legs white with tinge of yellow, elongate, slender, pubescent. 



Abdomen dirty gray, with dense short hairs but with few long 

 hairs on dorsum (one row at base each tergite), bristles longer at 

 end of abdomen. 



Measurements. — • 



Length of entire soldier, 2.7-3.4 mm. (average 3.2 mm.). 



Lengtli of head with nasus, 1.2-1.4 mm. 



Length of head without nasus (to anterior), 0.675 mm. 



Length of nasus, 0.50-0.52 mm. 



Length of pronotum, 0.087-0.1 mm. 



Length of hind tibia, 0.575-0.6 mm. 



Width of head, 0.48-0.50 mm. 



Width of pronotum, 0.32. 



N. {S.) angusticeps is close to N. {S.) microsoma Silvestri but 

 is smaller and has a narrower head. 



I'ype locality. — Espia, Bolivia. 



Described from a series of soldiers collected at the type locality by 

 W. M. Mann. 



Type soldier.— Cat. No. 27655, U.S.N.M. 



Subgenus Convexitermes Holmgren 



This subgenus of the genus N asutiterines Banlcs was established 

 by Holmgren in 1912, and is confined to South America. Only 

 five species are as yet known, namely, convexifrons Holmgren, nigri- 

 cornis Holmgren, both of Peru, ka7'tahoensis, 7nazaruniensis, and 

 manni Emerson of British Guiana. The soldier caste is character- 

 ized by a short, thick, and conical nasus. 

 60730—26 3 



