NO. I20f,. ICIINE UMON FL TES—A8HMEA D. 197 



Middle coxio rontiguons, not scparutcil ])y a triangular or bilobed projec- 

 tion of the mesosterninu, the latter being squarely truncate at apex. 



Thorax in the female divided into two parts; pygidium normal; hypopy- 

 gium in male itroduced into a sharp acuh'us, which curves upward 

 (very rarely sini])le, unarmed); hind wings wWi a distinct anal 

 lobe, the cubitus originating from the apex of tlu^ snbmedian cell, 

 interstitial w'ith the transverst; median nervure, or ran^ly originat- 

 ing beyond it Family XLI. MvKMOsiDyK. 



Thorax in female undivided, all the parts being closely united or 

 soldered together, and uithout visible sutures between; j^ygidium 

 normal; hypopygium iia male simple, unarmed, but the genital 

 plate is armed witli two slender, straight spines, which project more 

 or less distinctly from the tij) of the abdomen; hind wings without 

 an anal lobe, the cubitus originating far before the transverse median 

 nervure Family XLII. Mutili.id.'k. 



TABLE OI<" FAMILIES. 



Abdomen with the jietiole composed of a single joint or node, never with a con- 

 striction between segments 2 and 3 4 



Abdomen with the petiole composed of two joints, nodes, or scales, or if with one, 

 with a strong constriction between segments 2 and 3. Females and 

 workers with the sting well developed; orifice of the cloaca slit or 

 cleft. 



Middle and posterior tibiai iiitli apical spurs 2 



]\Iiddle and posterior tibiaj iinthout apical sj^urs 3 



2. Males without cerci; subgenital plate semicircularly emarginate, ending in two 



prongs; genital organs wholly retractile; frontal carinre close to- 

 gether, nearly vertical, not at all covering the base of the antennae. 



Family XLIII. DoRvuDiE. 

 Males with cerci; subgenital plate never ending in two prongs; genital organs, 

 except in a single case, not wholly retractile; frontal carinas most 

 frequently remote; if close, they are usually dilated anteriorly in an 

 oblique or horizontal lamina, and cover in part the insertion of the 

 antennfc. 

 Petiole 1-jointed, but there is always a constriction between segments 2 and 3; 



pupai covered with a cocoon Family XLIV. Ponerid.e. 



Petiole with 2 joints or nodes; pupa? naked, without a cocoon. 



Family XLA". Myrmicid.e. 



3. Male genital organs prominent; clypeus viewed from in front triangular, subtrian- 



gular, or semicircular, and always prolonged posteriorly between 

 antenna?. (Leaf-cutting ants; all fungus growers. ) 



Family XLVl. CRYProcERin.E. 



4. .Mandibles linear, parallel, articulated at or near the middle of the anterior mar- 



gin of the head, in male very small or rudimentary; eyes in males 

 very large, occupying most of the sides of the head; fi-ont wings with 

 three cubital cells; females and workers with the sting well devel- 

 oped; orifice of cloaca slit or cleft. 



Family XLVII. OnoxTOMAcnin.E. 

 Mandibles articulated normally toward the antericjr lateral angles of the head, 

 never linear, parallel, nor very small; rudimentary in males; eyes 

 not especially large. 



