98 GENERA OF HYMEXOPTEKA. 



Mandibles Hat, triangular, the broad terminal margin simple or toothed; petiole 

 free, cubical and surmounted by a thick scale. 



Antenna' 12-lU-jointed. 



Last joint of funicle not as long as the four preceding joints combined ; 

 eyes J 9 placed near the anterior lateral margin of head ; metathorax 

 unarmed ; wings % 9 with the two complete submarginal cell:; and the 

 discoidal cells joining each other, marginal cell complete; antennae 



§ 9 12-jointed, % 13-jointed Poiiera* Latr. 



Last Miint of funicle fully as long as the four pre<!eding joints combined; 

 eyes placed an the laten.! middle of head ; metathorax with a short 

 bro..d triangular tooth on each side; antennae liJ-jointed; tibial spurs 

 pectinate ( ^) Proceratium Roger. 



Antennae 9-jointed, la-st joint very large, oval, nearly as long as all the pre- 

 ceding funicle joints united ; apical margin of clypeus projecting over 

 the mandibles, which are without teeth ( ^ 9 )•• Discolhyrea Kogcr. 



Family MYRMICID/E£. 



Table of Genera. , 



Workers. 



Antennal fovea terminated outwardly by a carina ; clypeus interposed between 

 insertion of antennte ; frontal carinae placed in middle of anterior ])art 



of the head 2. 



Antennal fovea without ext<?rnal carina 3. 



2. — Antennae 11-jointed; eyes tolerably large, reticulated; maxillary palpi 4- 

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

 on each side posteriorly ; thorax above armed with several spines or 



tubercles Atta Fabr. 



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

 not impressed ; maxillary palpi 2-jointed, labial palpi 3-jointed (two 

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

 and curved at tip, somewhat sickle-shaped, but not flattened, the bead 



very large) Ecitoil Latr. 



3. — Clypeus interposed between in.sertion of antenna-; frontal carinae placed in 



middle of anterior part of head ; antennae lO-li-jointed 4. 



Clypeus not inter]H)sed between insertion of antennse. 



Frontal carina' placed close together on middle of anterior part of head ; 

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

 of head ; frontal area wanting : antennae 12-jointed ; niandil)Ies trigonate : 

 fii-st joint (tf petiole slender at ba.se and rather suddenly nodose at tip. 



Psendomyrnia (iuer. 

 Frontal carina' jilaced on lateral margin of the head, which is cordiforni ; 

 antennae O-jointed, second and third joints of funicle short; metatho- 

 rax unanned Striiiiiigeiiys Smith. 



4. — Antennte 10-jointed, the club very large, 2-)ointed ; clypeus with two lateral 

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



* Arotropus Prov., which is placed by the describer in the Braconida^. appears 

 to l>e identical with this genus. 



