SMITH OK HYMENOPTEEA OF AUU ISLANDS. 145 



smooth polished prothorax alone would distinguish it j its head is much 

 broader anteriorly, and less elongate. 



Gen. PsEUDOMYEMA, Quer, 



1. PsEUDOMYRMA LiEViCEPS. P. nigra, laevis et nitida; antennis, 

 mandibulis, tibiis anterioribus, tarsisque rufo-fulvis. 



Worker. Length 2\ lines. Black and shining ; head very smooth and 

 slightly emarginate behind, the eyes large and ovate ; the mandibles 

 and antennae rufo-fulvous. Thorax with the sides flattened, the disk 

 slightly convex ; a deep strangulation between the meso- and meta- 

 thorax, the latter rounded above and oblique behind ; the trochanters, 

 articulations of the legs, and the tarsi rufo-fulvous. Abdomen thinly 

 covered with a fine cinereous pile ; the first node of the petiole some- 

 what oblong-ovate, the second subglobose, the petiole of the first 

 node short. 



Hab, Aru. 



Gen. PoDOMYEMA, Smith. 



Head oblong in the female, rather wider than the thorax ; in the worker 

 subovate and much wider; eyes small, ovate and placed about the 

 middle at the sides of the head ; antennce geniculated, the scape about 

 two thirds of the length of the flagellum which is clavate, the club 

 three-jointed; the mandibles stout and dentate; the labial palpi 3' 

 jointed; the maxillary palpi 4-jointed. Thorax, oblong-ovate in the 

 female, in the worker transverse in front and narrowed behind with 

 the metathorax bidentate ; the anterior wings with one elongate mar- 

 ginal cell and two submarginal cells, the second extending to the 

 apex of the wing ; the legs stout, the femora incrassate ; abdomen 

 ovate, the peduncle with two nodes. 



The insects included in this genus are undoubtedly most nearly allied 

 to those belonging to the genus Myrmecina ; but, excepting that they 

 agree in having the same number of joints in the palpi, they have little 

 resemblance to each other. With the exception of the genus Myrmecia, 

 these are the largest insects in the subfamily Myrmicidae ; and all the 

 species are distinguished by their remarkably thickened femora and 

 margined thorax : we are unacquainted with the males. 



1. PoDOMYRMA FEMORATA. P. ferruginea ; capite oblongo, oblique 

 striato, thorace abdomineque laevibus nitidis ; alis subhyalinis fusco- 

 nebulosis; fcmoribus valde incrassatis, basi tenuissimis, femoribus 

 posticis infra compressis. 



Female. Length 8 lines. Uufo-testaceous ; the mandibles and anterior 

 margin of the face black, the inner margin of the mandibles rufo- 

 piceous and armed with six short stout teeth, the apical tooth largest. 

 The head oblong, slightly narrowed posteriorly and emarginate be- 



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