270 WHEELER. 



vertical wall. Epinotum elongate; its basal subhorizontal face has 

 posteriorly a large transverse impression. Declivity rather short, 

 a little convex, very oblique, with two elevated stigmata above on the 

 sides. Petiole without a distinct node, only more convex above than 

 below. External genital valves with the form of an obtuse equilateral 

 triangle (in pollens Emery, they have a long, narrow, curved append- 

 age). On the other hand, one of the rami of the median valves is 

 prolonged into a narrow style forked like a Y, the inferior branch of 

 which is sharp and pointed like a needle. 



" Sculpture, pilosity and pubescence as in the worker. 



"Gaster nearly black; thorax, mandibles, femora and tibiae brown. 

 Declivity of epinotum, petiole and the remainder of body, including 

 the head, yellowish testaceous. Wings brown, pubescent, having 

 only the scapular and externo-median cells; all the others lacking; 

 the nervures, however, without the appearance of atrophy. 



"Certain workers are almost entirely black, like unicolor Emery, 

 but this latter has a much broader and shorter head, which is concave 

 behind, and the petiolar node is longer and lower; the epinotum is also 

 shorter and more convex (with the appearance of a concavity on the 

 basal surface as in the worker frog gatti). L. froggatti is also allied to 

 niger Emery, but this species has no teeth on the terminal border of 

 the mandibles,^ the head is much narrower behind and the petiole 

 and epinotum have a different form. Finally, 7iigrive7itris Emery, 

 (rede Guerin) has a broader head and higher node. 



"New South Wales (Walcher), in wood." 



I have not seen this species and have therefore translated Forel's 

 description. It is cited by Froggatt from Noundoc, N. S. W. 



6. Leptomyrmex nigriventris (Guerin). 

 (Fig. 6a and b.) 



Formica nigriventris Guerin, Duperry, Voyage de Coquille, Zool. 2, 

 1830, p. 203, U PI. 8, Fig. 4; 



Leptomyrmex nigriventris Emery, Ann. Mus. Stor. Nat. Genova, 24, 

 1887, p. 252 y ; Dalla Torre, Catalog. Hymen. 7, 1893, p. 162 ^ ; Ann. 

 Soc. Ent. Belg. 39, 1895, p. 351 ^ , fig.; Froggatt, Agric. Gaz. N. S. W., 



9 This statement is clearly contradicted by Emery's figure, which I have 

 reproduced on p. 275. 



