700 Bulletin American Museum of Natural History. [Vol. XXIII, 



Part II. Descriptions of North American Attii. 



1. Atta texana Buckley. 



Myrmica (Atta) texana Buckley, Proc. Acad. Nat. Sci. Phila., 1860, p. 233, § 9 c^. 

 Myrmica texana Buckley, Proc. Acad. Nat. Sci. Phila., 1861, pp. 9-10. 

 (Ecodoma texana Lincecum, Proc. Acad. Nat. Sci. Phila., 1867, pp. 24-31. 

 (Ecodoma texana Buckley, Proc. Ent. Soc. Phila., VI, 1867, p. 347, no. 62, $ 9 cJ*. 

 Atta fervens Townsend, Amer. Entom. and Botan., II, 1870, pp. 324-325, figs. 202 



and 203, $ $ . 

 Atta fervens McCook, Ann. Mag. Nat. Hist., (5) III, 1879, pp. 442-449. 

 Atta fervens McCook, Nature, XX, 1879, p. 583. 

 Atta fervens McCook, Proc. Acad. Nat. Sci. Phila., 1879, pp. 33-40. 

 (Ecodoma texana Nehrling, Zool. Garten, XXV, 1884, p. 265. 

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

 Atta fervens Emery, Zool. Jahrb., Abth. f. Syst., VIII, 1894, p. 329. 

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

 Atta ferxKns Wheeler, Amer. Natur., XXXV, 1900, pp. 851-862, 2 figs. 

 Atta fervens Wheeler, Trans. Texas Acad. Sci., IV, no. 2, 1902, p. 13. 



Soldier. (Fig. 7 and PI. XLIX, Fig. 11.) Length 10-12 mm. 



Head cordate: without the mandibles broader than long, with rounded posterior 

 corners and shallow obtuse occipital excision. Mandibles long, flattened, with a 

 large acute apical and 9 or 10 blunt, subequal basal teeth. Clypeus short and broad, 

 with bidentate and arcuately excised anterior border. Frontal carinse continued 

 as distinct, diverging ridges as far back as the middle of the head; their lobes with 

 a prominent tooth above the insertion of each antennal scape. Frontal area large, 

 triangidar, indistinct. Antennae slender. Eyes conA'ex, hemispherical, about | the 

 distance from the anterior to the posterior corners of the head. Ocelli absent. 

 There is a tooth on the lateral carina between the eye and the clypeus, two small 

 spines or teeth on the ventrolateral surface of the he&d, one or two similar teeth on 

 each occipital lobe and behind them a large prominent spine. Thorax with four 

 pairs of spines: one small acute pair on the inferior corners of the pronotum, a 

 large robust, acute and erect pair, sometimes reduced to conical projections, above 

 on the sides of the pronotum; a much .shorter, often more slender and less tapering 

 pair on the mesonotum, and a long, acute, backwardly directed pair on the epinotum. 

 The last are prolonged forward at their bases in the fomi of a pair of anteriorly con- 

 verging ridges. Petiole about 1^ times as long as broad, pentagonal from above, 

 broadest in the middle; node concave in the middle with a ridge on each side. Post- 

 petiole nearly twice as broad as the petiole, about as broad as long, narrowed in 

 front, flattened above, with a pair of more pronounced and uneven mesial and a pair 

 of shorter and feebler lateral ridges. Gaster oval, broadest at the middle, with 

 somewhat angular anterior corners and abruptly conical tip. Legs very long and 

 slender. 



Mandibles and clyj eus shining; the former coarsely striatopunctate, the latter 

 finely and unevenly punctate. Remainder of body opaque, very finely punctate or 

 granular. 



Hairs long, erect or reclinate, curved, golden yellow or fulvous, covering the 



