1)8 GENERA Ul- IIVMKXOI'TKHA. 



Miindible,s flat, trianfjiiliir, the broad terminal iiiarjiin siiiii)le or toothed: petiole 

 free, cubical and .siirinoiintcd by a thick scale. 

 Antemiiv l"i l^i-jointed. 



Last joint of fiiiiicle not as loiifj as the four invci-dins joints combined; 

 eyes ^ f i)laced near tlie anterior lateral marsin of head : metathorax 

 unarmed ; winjts % 9 with the two com])lete sui)niar<;inal cells and tlie 

 discoidal cells joininji each other, maryiinal cell complete: antennae 

 ^ 9 12-joiuted. % l.'i-jointed INmera* Latr. 



Last joint of funide fully as lous as the four preceding joints (U)mbiiied ; 

 eyes placed on the lateral middle of head; metathorax with a short 

 broad trianjiular tooth on each side; antennse 1'2-jointed; til)ial spurs 



pectinate ( ^ ) Proooratiiiin Rojier. 



AntcnniP 9-jointed, hist joint very large, oval, nearly as long as all the pre- 

 ceding finiiclc joints united : apical margin of clypeus ])rojecting over 

 the mandibles, which are without teeth ( ^ 9 )--I^i*><'olll.y roa Roger. 



P^uiiily MYRMICID^. 

 Table of Genera. 



Workp)'.''. 



Antennal fovea terminated outwardly i)y a carina ; clypeus interposed ln^tween 

 insertion of antennje ; frontal cariuje placed in middle of anterior part 



of the head 2. 



Antennal fovea without external carina :i. 



2. — Antennae 11 -jointed; eyes tolerably large, reticulated; maxillary i)alpi 4- 

 jointed, labial palpi 2-jointed ; head more or less cordate, with a tooth 

 on each side ])osteriorly ; thorax aliove armed with several spines or 



tubercles Alta Fabr. 



Antennae 12-jointed ; eyes very minute and simple or wanting: frontal area 

 not imiiressed : maxillary palpi 2-jointed. labial palpi .■J-jointed (two 

 kinds of workers, the major having the mandibles very long, narrow, 

 and curved at ti]), somewhat sickle-shaped, but not flattened, the head 



very large) Kcitoii Latr. 



3. — Clypeus interposed between insertion of antennje; frontal carina' placed in 



middle of anterior puvt of head ; antennae 10-l5-jointed 4. 



Clypeus not interposed bi'tween insertion of antennse. 



Frontal carina- placed close together ou middle of anterior part of head : 

 eyes large, elongate-oval, occupying more than half of lateral margin 

 of head ; frontal area wanting ; antenuiB 12-jointed ; mandil)les trigonate ; 

 first joint of petiole slender at base and rather suddenly nodose at tip. 



PMOiidoiii.vi'iiia (iiu'r. 

 Frontal carinae placed on lateral margin of the head, which is cordiform ; 

 antenna.* (J-jointed. second and third joints of fnnicle short: mctatho 



rax unarmed Ktriiiiii;;oii,v.»i Smith. 



4. — Antennae 10-jointed, the club very large, 2-jointcd ; clypeus wiiii two lateral 

 csirina; which are terminated in front by two teeth; eyes very .small ; 



* Arotropus Prov., which is placeil by the describe)- in the Ilraconida'. apjjcars 

 to be identical with this genus. 



