92 GENERA OF HVMEXOPTERA. 



Surface of the third segment Just ahove.the siioiit-likr prujcctioii produced 

 into a cone shajied piece forniinfi the direct apex of a fold whicli 

 extends on each side just above the apical and lateral niar<riiis. 



l>i|>l4»ri*liOM Aaruii. 

 Emargination or notch of the apex closed, or jiartly filled up by a membrane, 



which is excised beneath ^'otoziiM I'orst. 



Apical margin of the third abdominal segment entire or broadly sinuate. 



llol4>i>.vj;;a Dahlb. 

 Tarsal claw with one small per])eridiciilar tdoth in the middle. 



IICMlycliridiiini Pen-in. 

 Tareal claws bifid at the apex, without inner teeth Ho<lycliriiiii Latr. 



Subfaniily CnRYSiDiXiE. 



Head as broad, or broader than t be postscutellum ; space between the eyes on the 

 face as wide as the distance between the base of antennse and the vertex ; the 

 carina transverse, not forming a basin on the vertex; postscutellum rounded 

 po.steriorly ; first abdominal segment rounded, not carinated on the sides; 

 second segment about twice as long on the dorsum as on the sides, its poste- 

 rior margin about straight in the middle, convex lateral ly...Clirysis Linn. 



Head small, much narrower than the jiostscutcllum ; space between the eyes, on 

 the face, narrow, not half as wide as the distance between the i)ase of an- 

 tenna' and the vertex; the carina extended njiward, surrounding the ante- 

 rior ocellus, forming the margins of a di.stinct basin, much in shai)e of a 

 horee-shoe; postscutellum partly hidden, ju'ojecting into a subconieal piece, 

 which is strongly excavated; first al)duminal segment fiattened on the sides, 

 causing a short, oblique carina above; second segment more than three times 

 as long on the dorsum as ou the sides, its po.sterior margin equally and very 

 convex Kf ilbiiiii .'-^pin, 



Suhfainily I* AKxorix.E. 



Comprising a single genus whose characters are those of the subfaniily, and at 

 once recognizi'd by the lengthened bee like i)roboscis PariMkpos Fabr. 



HETEROGYNA. 



This series is composed of a large number of insects familiarly 

 known as Ants (but not including the " wliite ants," or TiTuiites, 

 which belong to tlu- Ncuroptcra), "and wiiich are known Ity tlicir 

 habit of residing in more or less numerous societies under ground ; 

 whence arises the necessity for a great number of individuals (woi'kers 

 oi' iiciili r>) liavino ilu- sexual mgans and instincts rendered abortive, 

 wl)cr('l»v, l)eing freed from the latter, tlicy arc tlic better littcd to 

 perform tiie labors of the comniiinity. Cor wliicli piirpcwe they are 

 UKtrcover destitute of winus; whilst tiic nialcs and females arc innch 



