ART, 14 TEEMITES FKOM AMAZON BASIN SNYDER 25 



ARMITERMES (ARMITERMES) FESTIVELLUS Silvcstri 



Cavinas, Bolivia, February, 1922 (soldiers with C. {C ornitertnes) , 

 species). 



ARMITERMES (ARMITERMES) TEEVANI Emerson 



Kio Madidi, Bolivia, February 1922 (soldiers and workers) ; 

 Ixiamas, Bolivia, December, 1921 (soldiers and workers). 



ARMITERMES (CURVITERMES) ODONTOGNATHUS Silvestri 



Reyes, Bolivia, October, 1921 [soldier and workers with N. {Veloc- 

 itermes) uniforviis Snyder] ; Ixiamas, Bolivia, December, 1921 

 (soldiers and workers with M. {Spiniterines) rohustus Snyder, sol- 

 diers and workers). 



ARMITERMES (RHYNCHOTERMES) NASUTISSIMUS Silvestri 



Reyes, Bolivia, October, 1921 (soldier and workers). 

 Genus NASUTITERMES Banks 



Species of Nasutitermes {se7isu stnctore) have the head of the 

 winged adult more or less broadly oval to round; the post clypeus 

 usually much shorter than half its breadth, usually light colored; 

 segments of antennae usually not elongate; left mandible with first 

 marginal tooth nearly as long as second. 



The soldier is usually monomorphic, antennae usually not mark- 

 edly elongate, 12-14 segments ; nasus more or less conical, depression 

 at base of nasus but slight; mandible with point. 



The worker with post clypeus always much shorter than half its 

 breadth. 



Of all the genera of termites, Nasutitermes {sensu strictore) has 

 the most species. Some species appear to be variable and to inter- 

 grade, N. Holmgren in 1909 established groups for the soldiers of 

 certain similar American species; these groups and his key to Amer- 

 ican species are valuable aids to work in this genus. 



The soldiers of Nasutitermes {sensu strictore) differ specifically 

 in the length and breadth of the head; whether the profile of the 

 head is straight, slightly convex or concave ; size and shape of nasus ; 

 number of segments of antenna, relative size of third segment; posi- 

 tion and number of bristles on head and presence or absence of 

 pubescence; presence or absence of bristles and pubescence on tergites 

 of abdomen; color; and size of worker. 



In some species, the winged adult of Nasutitermes {sensu strictore) 

 also shows variation. In N. ephratae Holmgren the size of the eye 

 varies, sometimes being 0.50 mm, in diameter (long diameter) or 

 smaller; the prominence of the ocelli also varies in some speci- 



