1907.] Wheeler, Fungus-growing Ants of North America. 721 



Like the worker in sculpture and pilosity. 



Head, post petiole, gaster and appendages coloi-ed as in the worker. Thorax 

 dark brown, mesonotum and scutellum blackish, each of the convex areas of the 

 former with a reddish brown spot. Wings opaque, smoky bro^\n, with pale veins. 



Male. Length: 2.3 mm. 



Head, including the eyes, about as broad as long, with straight posterior border 

 and acute posterior angles. Eyes large and convex, in front of the middle of the 

 head. Ocelli projecting. ^landiljles rather slender, with two apical and no basal 

 teeth. Clj'peus convex, with very faintly notched anterior border. Lobes of 

 frontal carinse like those of the worker but erect; posterior ridges obsolete. Antennte 

 slender; scapes suddenly thickened towards their tips and surpassing the posterior 

 corners of the head by nearly h their length; funicular joints cylindrical, less than 

 twice as long as broad except the four terminal joints which are longer; first funicular 

 joint thicker than the others. Thorax similar to that of the female but much more 

 slender; basal surface of epinotum longer; spines short and rather acute. Petiole 

 and postpetiole like those of the worker, but the former segment is proportionally 

 longer and the latter has the median depression further forward. Gaster elliptical, 

 slightly flattened; first segment in front with a narrow, faintly impressed line. 

 Genitalia retracted. Legs slender; hind femora without a triangular projection 

 on the flexor side. 



Opaque; gaster finely shagreened and distinctly shining. 



Appressed white hairs less scale-like and conspicuous than in the worker and 

 female, especially on the gaster; very short on the legs and antennal scapes. 



Coloration similar to that of the worker; terminal gastric segments, legs and 

 antennae dull yellowish l^rown. Wings as in the female. 



Texas: Sources of the Comal River at New Braunfels (Wheeler). 



15. Cyphomyrmex rimosus var. fuscus Emery. 



E.MERY, Bull. Soc. Ent. Ital., XX^T, 1894, p. 89, $ $ d^. 



In this variety, described from Santa Catharina, Brazil, all three phases 

 are "entirely brown; mandibles, funiculi and articulations reddish; stature 

 a little more robust" than the typical form. 



16. Cyphomyrmex rimosus var. major Ford. 



FoREL, Ann. Soc. Ent. Belg. XLV, 1901, p. 125. $. 



In the worker of this variety from Guatemala the stature is somewhat 

 larger (2.7—2.8 mm.) than that of the typical form, the ear-like corners of 

 the head longer and the thoracic ridges and projections more prominent. 



