AET. 13. ANTS FROM HONDURAS AND GUATEMALA MANN. 47 



by more approximate, finer carinae, which are dentate bluntly in front 

 and extend in a concave curve on the sides of the mesothorax where 

 they are bidentate; humeral spines short and blunt, Mesoepinotal 

 impression strong, bordered by a continuation of the pro-mesotho- 

 racic carina. Base of epinotum flat, quadrate, much longer than 

 broad, shorter than the declivity, both surfaces with thin lateral 

 margins which bear triangular spines at the angle. Petiolar peduncle 

 longer than the node, anteroventral spine very small, node in pro- 

 file rounded in front, flat and sloping above; from above, longer 

 than broad, rounded in front and concave at posterior border. Post- 

 petiole more than twice as broad and a little longer than the petiolar 

 node, broadest behind. Gaster rather flat above, especially basally : 

 margined at sides. 



Densely granulose-punctate and opaque. Mandibles punctate and 

 striolate and subopaque. 



Fig. 20. — Myr.mecocbypta ednaella, new species. Worker, c. Head ; 

 6, thorax and petiole. 



Hairs on head and body short and clavate, moderately abundant 

 and regularly arranged on head, postpetiole, and gaster, sparse and 

 only on ridges of the thorax, epinotum, and petiole, with half a dozen 

 on anterior portion of pronotum. Appendages with abundant 

 strongly-curved semii'ecumbent squamiform hairs. 



Yellowish brown to dark reddish brown. Pilosity white. 



Female. — (dealated). Length 3.10 mm. 



Head resembling that of the worker; ocelli small. Pronotum with 

 broadly triangular, horizotal humeral spines and much larger and 

 thicker spines at middle of side margin. Mesonotum irregularly 

 margined at sides and with a pair of parallel ridges on median sur- 

 face. Scutellum broader than long, carinate at middle, the surface 

 on either side depressed and flattened, posterior margin projecting 

 horizontally as strong, blunt teeth, sides margined, the margins on 

 front elevated as large, broad spines rounded at tips. Epinotal 

 spines stronger than in worker. 



Sculpture similar to the worker except that the occipital region 

 of the head and the thorax bear irregular striae. 



