200 THE CANADIAN ENTOMOLOGIST. 



Abdomen with a strong constriction between segments 2 and 3, the 

 first two segments being more or less nodiform 3. 



2. Thorax in female almost round, not or hardly longer than wide ; 



head quadrate ; mandibles falcate ; maxillary palpi 3-jointed ; 

 labial palpi 2-jointed ; males winged, the front wings without a 

 marginal and a discoidal cell ; hypopygium at apex 



tridentate Subfamily I. — Bradynobaeninte. 



Thorax in female not nearly round, much longer than wide ; head 

 variable, the maxillary palpi more than 3-jointed, the labial palpi more 

 than 2-jointed ; males winged, the front wings with a marginal and 

 a discoidal cell ; hypopygium ending in a single aculeus, which 

 curves upwards, rarely unarmed Subfamily II. — Myrmosinse. 



3. Front wings in males (except in Myrmosida, Smith, which has a 



marginal cell and two cubital cells) without marginal and discoidal 

 cells ; hypopygium, except in Myrmosida^ Smith, ending in a 

 single upward curved aculeus ; females readily known by the con- 

 striction between segments 2 and 3 .Subfamily III. — Apterogynin^e. 



Subfamily I. — Bradynobaenin?e. 



This subfamily, so far as the characters of the males are concerned, 

 approaches nearest to the Thynnidce^ the hypopygium being tridentate, 

 much as in Thynnus, Fabr. but the venation is quite different. 



The marginal and the discoidal cells are absent, and thus show an 

 affinity with the Apterogyniiice. The female, however, is quite different 

 from any in either the My?'inosi?i(e or the Apterogyniiice, the thorax being 

 very short in outline, almost round, while the head is quadrate, the 

 mandibles falcate, the maxillary palpi 3-jointed, the labial palpi 2 jointed. 

 Only one genus is known : 



Female, wingless i. 



Male, winged 2. 



1. Thorax in outline almost round ; head quadrate ; mandibles 



falcate Bradynobaenus, Spinola. 



(Type B. Gayi, Spin.) 



2. Front wings without a marginal cell, the discoidal cells wanting; 



hypopygium tridentate Bradynobaenus, Spinola 



Subfamily II. — Myrmosinje. 

 1896. Myrmosini, Tribe I. (partim), Ashmead ; Trans. Am. Ent. 

 See, XXII., p. i8o. 



