14 PROCEEDINGS OF THE NATIONAL MUSEUM voi.. C8 



Abdomen dirtj^-gray, with lif^ht-brown tinge, with long, dense 

 hairs. 



jS. hraziliensis is a larger species than molestus and differs in the 

 relative curving of the mandibles. 



The folloviing measurements are based on a series of soldiers from 

 Tumupasa, Bolivia, collected with workers by Dr. W. M. Mann, 

 December, 1021, and on two soldiers collected on November 20, 

 190T, b}^ D. Haseman, at Bomfin, Bahia, Brazil (Ace. Xo. 3441, 

 Carnegie Museum, Pittsburgh, Pa.), the latter specimens being 

 kindly loaned to me by Dr. A. Emerson. 



Measurements. — ™ t> ,• • t^ , ■ i> ■, 



Tumupasa, Bolivia Bahia, Brazil 



Total length of soldier 10-11 mm. 11. mm. 



X/ength of head with mandibles 6. mm. 5. 5-6. mm. 



Length of head without mandibles 4.2-4.6 mm. 4.4-4.5 mm. 



Length of pronotum 0.9-1.0 mm. 1.2 mm. 



Length of left mandible 2.4 mm. 2.6 mm. 



Length of hind tibia 3. 35-3. 5 mm. 3. 6-3. 7 mm. 



Width of head (at broadest point) 3.34 mm. 3.55-3.6 mm. 



Width of pronotum 1.75-1.85 mm. 2.0 mm. 



S. brazlliensis was described by N. Holmgren in 1911,* the de- 

 scription, however, is meager, consisting only of characters used in 

 a key to the species of Syntermes. Only the soldier and worker 

 castes are known. 



SYNTERMES MOLESTUS Burmeister 



Soldier (pi. 2, fig. 5). — Head light castaneous brown, slightly red- 

 dish anteriorly, shining, flatly arched, broadest near base, slightly 

 narrowed anteriorly, with few scattered, light yellow, long hairs. 



Fontanelle near front of head, opening (elliptical) projected into 

 a very short tube, nearly flat (but little raised). 



Antenna light yellow-brown, elongate, slender, with long hairs; 

 third segment slightly longer than second, fourth equal to or slightly 

 shorter than second. 



Labrum light yellow-brown, 3-lobed, central hyaline lobe tri- 

 angular, white, fleshy, tip of labrum with long hairs. 



Post-clypeus light castaneous-brown, not raised up. 



Mandibles piceous, shining, slender (more so than in hraziliensis 

 Holmgren), base reddish-brown, broad; mandibles relatively weakly 

 curved, incurved at tips; left mandible Avith 2-8 small blunt mar- 

 ginal teeth near base (hidden by labrum) ; right mandible with no 

 marginal teeth (pi. 2, fig. 5). 



Gula more than half width of the front at the middle. 



* 1911. Uolmgreii, N. 1. Bcmorkungen iiber einige Termlten-Aiten, Zoolog. .\nzeig<M', 

 vol. 37, no. 26, pp. 547-8, 13 June. 



