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bulletin: museum of comparative zoology. 



n:\l joint nearly three times as long; as penultimate. Eyes oval, twice as long as 

 broail, very flat, situated at anterior third of sides of head. Pronotum elevated, 

 strongly convex above and at sides. Promesonotal suture feebly impressed. 

 Mesonotum slightly convex. Mesoepinotal suture profoundly impressed. Epi- 

 notum concave between the spines, which are 

 triangular and acute apically, about twice as long 

 as their width at base and extending upward and 

 slightly forward. Petiolar node squainiform, emar- 

 ginate at middle of upper border; from above three 

 times as broad as long. Postpetiole a little broader 

 than petiole, broadest in front and narrowly rounded 

 at sides, gaster elongate oval. 



Shining. Mandibles sparsely punctate. Middle of 

 clypeus and frontal area smooth. Sides of clypeus, 

 cheeks, and front longitudinally striate and finely 

 rugulose between the striae; vertex and occiput 

 rugulose, with indistinct striae. Promesonotum 

 rugulose, pleurae, epinotum, and peduncle of petiole 

 cribrately punctate. Petiolar node finely punctate. 

 Postpetiole and base of first gastric segment rugosely 

 punctate, remainder of first gastric segment with regular punctures. 



Recumbent silky pubescence moderately abundant on head and body and 

 sparse, coarser, erect pile on front of head, petiole, postpetiole, and apical por- 

 tion of gaster. 



Fuscoferruginous; mandibles and appendages lighter. 



Fig. 25. — Oligomyrmex 

 viehmeyeri Mann. Sol- 

 dier. Front view of head. 



Worker. Length .75-1 mm. 



Head a little longer than broad, with convex sides and nearly straight 

 occipital border. Mandibles with five rather large triangular teeth. Anten- 

 nal scapes extending three fourths the distance to occipital corners; middle 

 funicular joints transverse; club as long as remainder of funiculus, terminal 

 joint three times as long as penultimate. Eyes small, situated at sides of 

 head well in front of middle. Promesonotum subglobose, as long as broad. 

 Epinotum flattened at base, the spines slender, acute, a little less than half as 

 long as their distance apart at base. Petiolar node higher than long, twice as 

 broad as long and rounded above. Postpetiole as broad as petiole, transversely 

 oval. Gaster short and broad. Legs long. 



Shining. Cheeks striate. Epinotum cribrately punctate, the rest very 

 finely punctate. 



Fine short, recumbent pilosity sparsely distributed on head, body, and 

 appendages. 



Color light ferruginous; appendages yellowish. 



Female. Length 2.80 mm. 



