48 



PROCEEDINGS OF THE NATIONAL, MUSEUM. 



Type locality. — Honduras: Lombardia. 



C otypes.—QdX. No. 24465, U.S.N.M. 



Described from two females and a small series of workers taken 

 from colonies beneath stones. The fungus gardens are pendulous, 

 hanging from the underside of the stones into little pockets, whicii 

 evidently are excavated by the ants. They are small in size — a little 

 smaller and somewhat the same shape as a thimble. There are few 

 individuals in a colony. 



The three impressions on the occiput, margined by the ridges. 

 which give the border superficially the appearance of being bioon 

 cave, and the form of the frontal carinae are very characteristic. 



MYCOCEPURNS SMITHI Forel, variety TOLTECA Wheeler. 



Honduras : Ceiba. 



SERICOMYRMEX OPULENTA, new species. 



^Yorker. — Length 4 mm. (fig. 21). 



Head, excluding mandibles, slightly longer than broad, broadest at 

 middle of sides: occipital corners projecting as strong, triangular. 



Fig. 21. — Slricomyrmhx opulknta. 



NKW SPECIKS. 

 PKTIOr.K. 



«, Head; 6, thorax anh 



rather bluntly pointed spines, from the bases of which thick ridges 

 extend to the frontal lobes. Occipital groove strong, extending down 

 vertex to opposite the frontal lobes and bordered basally by ridges 

 which half way down curve outwardly and join those which extend 

 from the occipital spines. Sides nearly straight, behind terminating 

 as short, blunt spines. Mandibles elongate, their blades with eight 

 short teeth, outer border distinctly concave at middle. Frontal lobes 

 large, widely separated, elevated, and thickened laterally; the sur- 

 face between their posterior halves elevated and with two short, poorly 

 defined ridges. Eyes large. Antennal scrobes strong, bordered out- 

 wardly by their carinae, which extend from in front of the eyes four- 

 fifths the distance to occipital border, and inwardly by the thiclv 



