452 



bulletin: museum of comparative zoology. 



The subspecies sublevinodis is larger in size and darker in color than 

 the typical siigniatica and has the entire dorsal surface of the 

 petiolar node and postpetiole shining and only feebly punctate. 



39. Rogeria (Irogera) tortuosa, sp. nov. Fig. 18. 



IJ'orker. Length 3.50 mm. 



Head a little longer than broad, as broad in front as behind, sides moderately 

 convex, posterior corners broadly rounded, occipital border feebly convex, 

 mandibles with three triangular teeth apically and four blunt teeth behind. 



Fig. 18. — Rogeria (Irogera) tortuosa Mann, 

 thorax and petiole. 



a. Front view of head. b. Lateral view of 



Clypeus flat at middle, anterior border broadly rounded. Frontal carinae 

 little broadened and flat in front, slightly divergent behind, nearly straight 

 and extending to tips of scapes, bordering poorly defined scrobes. Antennal 

 scapes extending four fifths the distance to occipital corners; first funicular 

 joint as long as the second and third together, joints 2-8 strongly transverse, 

 club slender, the terminal joint longer than the two preceding joints together. 

 Eyes moderately convex, situated at sides of head slightly in front of middle. 

 Promesonotum strongly convex above, the suture very indistinct; pronotum 

 broader than long, humeri obtusely angulate, sides only shghtly convex. 

 Mesoepinotal impression very strong. Base of epinotum strongly convex, 

 less than half as long as the declivity, which is concave and margined laterally; 



