1907.] Wheeler, Fungus-groiviny Ants of North America. 703 



a variety of cephalotes), because, as ]\Iayr has shown in his work on the 

 Formicidae of the Xovara Expedition, this scelerite and the genital append- 

 ages furnish excellent characters for distinguishing the species. 



2. Atta mexicana (F. Smith). 



The name of this species, which is not known to occur in Texas, though 

 it is widely distributed in Mexico at an altitude of 5,000 to 7,000 feet, must 

 either be attributed to Drury, and not, as has usually been done, to Say, or 

 if, as Dalla Torre maintains, the Formica jervens of Drury is merely a syn- 

 onym of A. cephalotes, we must adopt A. mexicana F. Smith as the name 

 of the Mexican form. As it seems to me to be impossible to determine the 

 species to which Drury's female specimen belonged, I believe that the name 

 me.xicana should be adopted. The synonymy disentangled from that oi A. 

 texana would then read as follows : 



1 Formica jervens Drury, lUustr. Nat. Hist., Ill, 1782, p. 58, pi. 42, fig. 3. $ . 



Atta ferrens S.\y, Boston Journ. Nat. Hi.st., I, 3, 1836, p. 2G0, Q . 



(Ecodoma mexicana F. Smith, Catalog. Hymen. Brit. Mus., VI, 18-58, p. 185, no. 



9 ? . PI. X, fig. 20. 

 (Ecodoma Mexicana Nortox, Amer. Xatur., II, 1868, p. 66, pi. I, figs. 9 and 10. 



?■ ^ 



(Ecodoma mexicana Nortox, Proc. Essex Inst., VI, 1868, Comm. p. 9, fig. § 9 . 

 ? (Ecodoma mexicarm Moreno, Naturaleza. Ill, 1876, pp. 189-190. 

 Atta fervens Lecoxte, Writings of Th. Say., Entom., II, 1859, p. 734. 

 Atta fervens M.a.yr, Rei.se der Novara, II, 1. Formicidfe, 1865, p. 81, 9 c?- 

 Atta fervens Forel, Bull. Soc. Vaud. Sc. Nat., XX, 1884, p. 47 (in part). 

 Atta fervens Dalla Torre, Catalog. Hjanen., VII, 1893, pp. 152, 153 (in part). 

 Atta Icevigata Pergaxde, Proc. Calif. Acad. Nat. Sci. (2), V, 1895, p. 896, 0. 

 Atta fervens Forel, Biol. Centr.-Am., Hymen., Ill, 1899-1900, p. 33 (in part). 

 Atta fervens Forel, Ann. Soc. Ent. Belg., XLV, 1901, p. 124, 0. 

 Atta fervens Wheeler, Ann. Soc. Ent. Belg., XLV, 1901, p. 200, $. 



3. Atta (Moellerius) versicolor Pergande. 



Atta versicolor Pergaxde, Proc. Calif. Acad. Sci. (2), IV, 1893, pp. 31, 32, $. 

 Atta (Acromyrmex) versicolor Emery, Zool. Jahrb., Abth. f. Syst., VIII, 1894, p. 



330, 0- 

 Atta versicolor Fexxer, Entom. News. VI, 1895, p. 215. 

 Atla (Acromyrmex) versicolor Forel, Biol. Centr.-Am., Hymen., Ill, 1899-1900, p. 



36, §. 

 Atta {Moellerius) versicolor E.mery. R. Accad. Sci. 1st. Bologna, April 1905, pp. 108, 



111, 0. 



Worker, (PI. XLIX, Fig. 5.) Length: 2.3-6 mm. 



Head without the mandibles broader than long, in larger specimens somewhat 



