ART. 13. ANTS FROM HONDURAS AND GUATEMALA MANN. 49 



ridges from the bases of occipital spines to the frontal lobes. An- 

 tennal scapes extending a little beyond the tips of occipital spines; 

 funiculus slender, gradually and feebly thickened apically. first joint 

 slightly shorter than the second and third together, all joints much 

 longer than broad and increasing in length toward the tips, terminal 

 joint slender, longer than the two preceding joints together. Pro- 

 notum broader than long, narrowed in front, surface sloping in front, 

 sides with a pair of blunt tubercles near posterior margin, inferior 

 angles with elongate, bluntly pointed spines. Mesothorax with three 

 pair of thick spines, the first more than twice as long and much 

 stouter than the intermediate pair, which are twice as large as the 

 posterior pair. Mesoepinotal suture strongly and broadly impressed. 

 Base of epinotum about as long as the declivity, bordered by a pair 

 of low, irregularly denticulate ridges, which terminate as short, com- 

 pressed, bluntly pointed spines; declivity broad and nearly flat. 

 Petiole in profile longer than high, convex above, sides with a short 

 longitudinal ridge; from above longer than broad, very slightly 

 broader in front than behind, with a pair of narrow, lateral ridges at 

 posterior half. Postpetiole nearly twice as broad as petiole, broader 

 than long, broadest behind, strongly and broadly longitudinally 

 grooved above. Gaster with a series of four longitudinal ridges. 

 Legs long and slender. 



Opaque. Mandibles feebly shining, densely striate basally. Head 

 and body densely punctate and unevenly rugo^^e. A])pendages 

 densely punctate. 



Body and appendages with abundant long, fine hairs which are 

 black basally and white toward the tips. These are stitfer. less erect, 

 and curved on the appendages. Appendages also with recumbent, 

 very fine and silky golden pilosity. 



Reddish brown to dark reddish brown. 



Type locality. — Honduras: San Juan Pueblo. 



Type.—OdU^o. 24i66, U.S.N.M. 



Described from a series of workers taken in a large colony. The 

 nest was in the ground, alongside a trail in thick woods. The en- 

 trance was in the form of a turret, loosely co)istructed of earth and 

 about 6 inches in height: a foot beneath the surface was a large 

 cavity, containing a fungus garden, pendulous and 4 or 5 inches in 

 diameter. 



The arrangement of the tubercles is somewhat similar to that in 

 iS. sausauerl Emery, which species, however, has but two pair on 

 the mesonotum and also has shorter epinotal spines, but otherwise 

 S. opulenta is very different from the other described species of Serio- 

 comyrmeas. 



