AET. 13. ANTS FROM HONDURAS AND GUATEMALA MANN. 



Fig. 2. — Opisthoscy- 

 phus scabrosus, 



NEW SPECIES. TiEAIi 

 OF WOEKER. 



separated from them by a suture. Frontal area strongly impressed, 

 not definitely outlined. Frontal carinae short, their lobes well de- 

 veloped, flattened, longer than broad and broader than their distance 

 apart, extending forward as far as the anterior border of clypeus; at 

 sides somewhat bent inward, broadly covering the antennal insertions. 

 Antennae 12-jointed, stout, the scape short, grad- 

 ually thickened distally; funiculus thickened to- 

 ward tip, with the terminal joint as long as the 

 two preceding joints. Eyes distinct, but small 

 and composed of few facets, situated at sides of 

 head a little behind the middle. Thorax robust, 

 without sutures above, unarmed, inferior angles of 

 prothorax pointed; spiracles on sides of epinotal 

 declivity very large. Petiole elongate, rounded, 

 with a moderate- sized antero ventral tooth. Second 

 gastric segment as long as the first and distinctly 

 broader; remaining segments small and extending as a cone down- 

 ward and forward. Tarsal claws simple. Anterior tibial spur 

 strongly pectinate. Middle and posterior tibiae with a single very 

 fine spur. 



Genotype. — pisthoscy phus scahrosus, new species. 



OPISTHOSCYPHUS SCABROSUS, new species. 



WorIie}\ — Length, 2.75 mm. (figs. 2-3). 



Head one-fifth longer than broad, a little narrowed in front, with 

 nearly straight sides and posterior border and rounded occipital cor- 

 ners. Lamellate portion of 

 mandibular blades at base with 

 three small, separated denticles 

 and anterior to these indis- 

 tinctly denticulate. Antennal 

 scapes extending four-fifths the 

 distance to occipital corners; 

 funicular joints 2-10 trans- 

 verse, each larger than the pre- 

 ceding joint. Thorax little con- 

 vex above, broadest in front of 

 middle of pronotal region and 

 somewhat constructed at sides 

 "between meso- and epi-notum. 

 Petiole from above a little longer than broad, sides moderately con- 

 vex ; in profile broadly convex above, longer than high. 



Opaque, mandibles and appendages somewhat shining. Mandibles 

 coarsely striate longitudinally. Head and body densely and rugosely 

 punctate and with regular reticulae. 



Fig. 3. — Opisthoscyphus scabrosus, new 

 SPECIES. Lateral view of worker. 



