202 THE CANADIAN ENTOMOLOGIST. 



2. Marginal cell \ow^; four cubital cells, the second and third each 



receiving a recurrent nervure Myrmosa, Latreille. 



Marginal cell shorter, triangular ; tJwee cubital cells, the second 

 triangular, receiving the first recurrent nervure near its middle, the 

 third hexagonal ; eyes large, extending to the base of the mandibles, 

 emarginate within Ephutomma, Ashmead. 



Trtbe II. — Chyphotini. 



1896. Chyphotini, Tribe III., Ashmead ; Trans. Am. Ent. Soc, 

 XXII., p. 179 (Cyphotini). 



1903. Methocinse, Subfamille, Andre' j Wytsman's Gen. Ins. Earn., 

 Mutillidas, p. 6. 



The absence of ocelli in the females and the armed hypopygium in 

 the males, which terminates in a single aculeus that curves upwards, as in 

 males in the family Myzijiidce, readily separate this tribe from the 

 Myrmosmi. 



Table of Genera. 



Eemales i. 



Males 4- 



1. Thorax not quadrate, quite differently formed 2. 



Thorax quadrate, the sides parallel. 



Head large, quadrate, wider than the thorax ; mandibles long, at 

 apex bidentate, sinuate or subemarginate beneath ; pygidium 



with a pygidial area Brachycistis, Fox. 



(Type B. petiolatus. Fox.) 



2. Eyes round or nearly ; abdomen petiolate or subpetiolate 3. 



Eyes oval, slightly sinuate on outer margin superiorly ; abdomen 



nearly sessile. 



Pronotum transverse, a little wider than the meso-metathorax 

 anteriorly, but not wider than the same posteriorly, the sides 

 being compressed just behind the pronotum (?). Milluta, Andre. 



3. Abdomen subpetiolate, the petiole broadened towards the apex and 



constricted before uniting with the second segment ; pronotum 

 large, nearly obtrapezoidal, and fnlly as wide as the meso-meta- 

 thorax, or a little wider Typhoctef, Ashmead. 



(Type Mutilla i)eculiaris, Cresson.) 

 Abdomen with a distinct slender petiole ; pronotum campanulate, 



much narrower than the meso-metathorax Chyphotes, Blake. 



(Type C. elevatus, Blake.) 



