714 Bulletin American Museum of Natural History. [Vol. XXIIl, 



with a pair of small acute teeth on the posterior border. Epinotum with short, 

 convex base and longer sloping and concave declivity; spines short, acute, not 

 longer than the base and hardly longer than broad at their insertions. Petiole and 

 postpetiole like those of the worker, but the former narrowed behind the middle and 

 the latter with more obscure tubercles. Gaster elliptical, broadest in the middle 

 tapering behind, without depressions and ridges on the first segment and with very 

 minute piligerous tubercles on both the dorsal and ventral surfaces. Genitalia 

 small and retracted. Legs very slender, without tubercles; terminal tarsal joint 

 slightly enlarged. Wings large, 5.5 mm. long. 



Whole body and appendages opaque, minutely granular; head finely and 

 longitudinally rugulose behind. Mesonotum with longitudinal rows of shallow 

 oblong depressions or foveolfe. Mesopleurse feebly rugulose. 



Hairs like those of the worker and female, but finer, straighter and more appressed 

 on the legs and antennae. 



Dull, rather light ferruginous; posterior portion of head, Mayrian furrows, 

 lateral borders and a large oblong spot on the posteromedian portion of the mesono- 

 tum, paraptera and sides of the scutellum black. Wings like those of the female. 



West Indies: Jamaica (T. D. A. Cockercll); St. Vincent (H. Smith); 

 Andros and New Providence Is., Bahamas (Wheeler); Culebra (Wheeler). 



I believe there can be no doubt that Forel's T. sharpi, Andre's jamaicen- 

 sis and my maritivia are all the same species. I have recently found in the 

 collection of the Philadelphia Academy of Sciences a few workers from 

 Jamaica, which agree very closely Avith Andre's description and with my 

 specimens of maritima from the Bahamas. These, in turn, are almost 

 identical with specimens collected from a greater number of colonies in the 

 island of Culebra. Prof. Forel, to Avhom specimens from the latter locality 

 were sent, pronounces them to be "indistinguishable from small specimens 

 of sharpi." Andre's name jamaicensis must stand, however, as his descrip- 

 tion was published some six months earlier than Forel's. So far as known, 

 therefore, there is only a single widely distributed species of Trachymyrmex 

 in the West Indies, although there is an allied form {T. urichi Forel) in 

 Trinidad and a subspecies of this (fuscatus Emery) and several distinct 

 species of the subgenus on the adjacent South American continent. 



T. jamaicensis is readily distinguished from all of our North American 

 species by the peculiar coloration of the worker and female, the structure of 

 the frontal and postorbital carinae, the shape of the petiole and postpetiole, 

 etc. The male is peculiar in coloration, the shape of the head, and in having 

 very small, concealed genitalia. 



9. Atta (Mycetosoritis) hartmanni subgen. et sp. nov. 



Worker. (PL XLIX, Figs. 6 and 7.) Length: L8-2 mm. 



Head, without the mandibles, longer than broad, but little broader behind than 



