APH^ENOGASTER. 



271 



A. rothneyi, p. 27-3. 



B. Head posteriorly uot produced into a neck. 



a. Pronotum seen from the front distinctly late- 



rally bituberculate ttmm 



b. Pronotum not laterally bituberculate. 



a. Head and thorax coarsely, very closely 



striate-reticulate, punctured and rugose . . A. schurri, p. 274. 

 b . Head and thorax very slightly and sparsely 



sculptured, shining. 



a 2 . Pro- and mesonotum forming one con- 

 tinuous convexity, mesonotum anteriorly 

 not raised into a transverse ridge or crest. A. sagei. p. 275. 

 b-. Pro- and mesonotum not forming one 

 continuous convexity, pro - mesonotal 

 suture distinct, anterior margin of meso- 

 notum behind the suture raised into a 

 ridge or crest. 

 a 3 . Antennae very slender; joints 2-7 of 



flagellum three times as long as broad. A. cristata, p. 276. 

 b 3 . Antennae a little more robust; joints 

 2-7 of flagellum only a little longer 

 than broad * A.smi/thiesi, p. 276. 



310. Aphaenogaster beccarii, Emery (Ischnomyrmex), Ann. Mus. Cu: 

 Gen. xxv (1887), p. 456, rf, pi. i, tig. 12, <J. 



. Light castaneous brown, smooth and shining, the thorax 

 posteriorly and the abdomen slightly darker, the head in certain 

 lights indistinctly finely striate on the front between the eyes ; 

 mesonotum posteriorly and rnetanoturn coarsely striate, sculptured 



Fig. 82. Aphcenogaster becca 



Profile of thorax ; b. Antenna. 



and rugose, the striae transverse on the metanotum above, oblique 

 on the sides ; the whole head, thorax and abdomen with scattered 

 minute piligerous tubercles. Head, including the mandibles, 

 viewed from above elongate, oval, broadest at the eyes, which are 

 large, somewhat elongate and oval ; mandibles triangular, broad 

 at the masticatory margin, which is furnished with three con- 

 spicuous teeth towards the apex, finely striate at base ; clypeus 

 ample, rounded anteriorly, convex in the middle, anteunal hollows 

 very large ; antennal carinae, the distinct carinaj between the eyes 

 and the antennal hollows convergent posteriorly ; antennae very 

 long and filiform, the scape extending well beyond the posterior 



