108 GENERA OF HYMEXOPTEI5A. 



The genus Ischiocei^as Prov. (Faun. Ent. Can. ii, <i<»i);, ilcscribcd 

 as belonging to the Scoliidse, appears to be c()n)j)osed of the males of 

 Mynnom and Meihoca, the " $ " being % Mxjrmom iinicolor Say, and 

 the % Methoca dijgia Say. 



The habits of the Mutillidie are believed to be parasitic, or at least 

 those of the genus MutiUa, and carnivorous in tlie larva state. The 

 late Frederick Smith states that from a nest of a certain s})ecies of 

 Bombu.i, only two worker bees were obtained, but as many as seventy- 

 six specimens of a Mittllla, the larvse of which were also found in 

 the cells closed in as usual by the full-fed grub of the bee. Their 

 attacks cannot, however, be confined to humble-bees, as the latter 

 have not been found either in Australia or tro])ical Africa, and yet 

 the Mutillidie are common in both countries ; likewise in ^lexico, 

 the species of MntUla are plentiful, while those of Boinbii.s are very 

 scarce. • 



Family SCOLIIDiE. 



Table of Genera. 



Eyes entire (except iu Myzine %) 2. 



Eyes emarginate within (subreniform) in both sexes 3. 



2. — Marjiinal cell of 9 open at apex, of % closed. 



Basal segment of abdomen rounded at base, not carinate ; first transverst- 

 cubital nervure obliterated or nearly so. therefore only two siibmar- 

 ginal cells; metatborax sub((nadrate, finely sciiliitnrod above, the 

 enclosed space oblong, slightly narrowed posteriorly ; second sui)niar- 

 ginal cell of % not narrowed towards the marginal, being truncate 



and broadest at tip; clypeus black in both sexes Tipliia Fabr. 



Basal segment of abdomen truncate at base, the truncation bounded by a 

 carina; first transverse cubital nervure present, but abbreviated, not 

 quite reaching the cubital nervure, therefore three submarginal (■ells ; 

 metatborax short, transverse, coarsely sculptured in % , the enclosed 

 sjiace triangular; % clypeus white and the third submarginal cell 

 narrowed towards the marginal and pointed at aiiex; second and 

 third submarginal cells sometimes confluent or nearly so, by the 

 , absence or abbreviation of the second transverse cubital nervure. 



I'aralipliia Sichel. 

 Marginal cell do.sed at apex in both .sexes, that of the 9 not touching the 

 anterior margin of the wing, except at the extreme base; three com- 

 plete submarginal cells, the ueuration of the anterior wings very differ- 

 ent in the sexes; eyes of % subemargiuate within lIj/.iiK' I.atr. 



;{. — Anterior wings with only one recurrent nervure >»«M>lia Fabr. 



Three submarginal cell-; Subgen. Triscolia Sauss. 



'J'wo submarginal cells Subgen. Discolia Sauss. 



