108 GENERA OF HYMENOPTERA. 



The genus Isehiocerm Prov. (Faun. Ent. Can. ii, ()09), described 

 as belonging to the Seoliidse, appears to be composed of the males of 

 Myrmosa and Methoca, the " 9 " being % Myrmosa unicolor Say, and 

 the % Meihoca dygia Say. 



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

 those of the genus Mutilla, and carnivf)rous in the larva state. The 

 late Frederick Smith states that from a nest of a certain species of 

 BombuH, only two worker bees were obtained, but as many a^ seventy- 

 six specimens of a Mutilla, the larvae 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 Mutillidaj are common in both countries ; likewise in Mexico, 

 the species of Mutilla are plentiful, while those of Bombxis are very 

 scarce. 



Family SCOLIID^. 

 Table of Genera. 



Eyes entire (except in Myzine %) 2. 



Eyes einarginate witliin (subreniform) in both sexes 3. 



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



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

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

 ginal cells; nietati irax snl)({uadrate, finely sculptured above, the 

 enclosed space oblong, slightly narrowed posteriorly; second submar- 

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



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



Basr.l segment of abdomen truncate at base, the truncation bounded bj- a 

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

 quite reaching the cubital nervure, therefore three submarginal cells ; 

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

 space triangular; % clypeus white and the third submarginal cell 

 narrowed towards the marginal and pointed at ap'^x ; second and 

 third submarginal cells sometimes confluent or nearly so, by the 

 absence or abbreviation of the second transverse cubital nervure. 



Paratiphia Sichel. 

 Marginal cell closed at apex in both sexes, that of the 9 "ot touching the 

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

 plete submarginal cells, the neuration of tlie anterior wings very differ- 

 ent in the sexes; eyes of % subemarginate within Myziiie Latr. 



3. — Anterior wings with only one recurrent nervure Kt'olia Fabr. 



Three submarginal cells Subgen. Trisoolia Sauss. 



■ Two submarginal cells Subgen. Discolia Sauss. 



