ABT. 6. NEW SPECIES OF TERMITES SNYDER. 29 



SYNTERMES COLOMBIANUS, new species. 



Soldier (pi. 4, fig. 24). — Head pale, yellow-brown, slightly darker 

 anteriorly, shining, flatly arched, broadest near base, narrowed 

 slightly toward front, with few scattered, fairly long, light yellow 

 hairs. 



Fontanelle near front of head, opening projected into a short tube. 



Antennae light castaneous-brown, elongate, slender, 19 segments, 

 with long hairs; third segment siibclavate shorter than second but 

 longer than fourth, which is short and subclavate. 



Labrum light yellow, 3-lobed, central hyaline lobe white, fleshy, tip 

 of labrimi with long hairs. 



Post-clypeus yellow-brown, somewhat raised up. 



Mandibles dark reddish-brown to piceous, base yellow to reddish- 

 brown, few hairs on base, shining, slender and nearly straight, in- 

 curved at tips; left mandible with two blunt small teeth near base, 

 do not project beyond margin of mandible; right mandible with no 

 marginal teeth (trace of tooth at base located between the two teeth 

 on the left mandible) . (See figure.) 



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



Pronotum yellow-brown, saddle-shaped, anterior margin emargi- 

 nate, with short blunt spines; meso- and metanota also with short 

 spines, more pointed than those on pronotum, shorter than in silvcstri. 



Legs light yellow-brown, elongate, slender, pubescent. 



Abdomen dirty gray with tinge of yellow-brown. 



S. colorribianus is a small species found in the Hagen collection at 

 Cambridge, Mass., with S. dirus (Klug) Burmeister. N. Banks has 

 kindly loaned me the specimen for study; colombianus is about the 

 same size as hraziliensis Holmgren, but, unlike that species, has 

 spines on the thorax. It may be close to iolivianus Holmgren. 



Measurements. — Total length of soldier, 10.5 mm.; length of head 

 with mandibles, 6.5 mm.; length of head without mandibles (to tip 

 labrum), 4.8 mm.; length of head without mandibles (to anterior), 

 4.2 mm.; length of pronotum, 0.9 mm.; length of left mandible, 2.5 

 mm.; length of labrum, 0.65 mm.; length of hind tibia, 3.5 mm.; 

 width of head (at widest point), 3.4 mm.; width of pronotum (to tips 

 spines), 2.25 mm.; width of labrum, 0.95 mm. 



Tijpe locality. — ''Colombia, S. Amer." 



Described from a single soldier in the Hagen collection labeled 

 '' S. dirus, Winthem, collector, Colombia, S. Amer." 



Type, soldier. — Cat. No. 14511, Museum of Comparative Zoology, 

 Cambridge, Mass. 



