THE CANADIAN ENTOMOLOGIST. 



5. Middle and posterior tibise 7iot spinous ; second ventral segment with 



a longitudinal impresssion on each side filled with a dense 



pubescence. (Europe, Africa and Asia.) Stenomutilla, Andre. 



. .. (Type Mutilla argentata, Villiers.) 



Middle and posterior tibiae spinous ; second ventral segment normal. 



(Europe, Africa and Asia.) Dasylabris, Radoszowski. 



(Type Mutilla arenaria, Fabr.) 



6. Head normal, unarmed 7. 



Head abnormally large, quadrate, armed on each side beneath with a 



tooth or spine, the hind angles acute or straight 8, 



7. Stigma in front wings indistinct ; mesonotum without furrows, or the 



furrows only slightly indicated ; first joint of the flagellum shorter 



than the second Dasylabris, Radoszk. (partim.) 



Stigma in front wings well developed ; mesonotum 7vith distinct 



■furrows. (Europe and North Africa.) Cystomutilla, Andre. 



(Type Mutilla ruficeps, Smith.) 



8. Marginal cell squarely truncate at apex ; second recurrent nervure 



subobsolete ; first joint of the flagellum longer than the second. 



(North and South America.) Hoplomutilla, Ashmead. 



(Type Mutilla cephalotes, Swederus.) 



9. Thorax obpyriform, ovate or ovoid ; head not unusually large. ... 10. 

 Thorax banjo-shaped, or nearly; head very large, quadrate, about 



twice as wide as the thorax 16. 



10. Pygidium smooth, without a pygidial area, or at most the area only 



slightly indicated, rarely finely, sparsely punctate 11. 



Pygidium not or rarely smooth, opaque, striate or rugulose, always 

 with a distinct pygidial area 14. 



11. Thorax bare, or with only a few sparse hairs ; eyes ovate or oval ; 



first ^bdominal segment petioliform, as wide at base as at apex ; 



rnetathoracic spiracles round or short oval 12. 



Thorax not bare, densely pubescent above ; eyes ellipsoidal or short 

 oval; first abdominal segment subnodose at apex; metathoracic 

 spiracles long, linear 13. 



12. Head transverse, much vvider than the thorax, the temples obliquely 



narrowed ; eyes rather large, oval Ephutopsis, Ashmead. 



Head transverse or subglobose, not much wider than the thorax; eyes 



ovate or oval ; flagellum not long, either subclavate or clavate, the 



first joint transverse, a little shorter than the second, the following 



short, wider than long; hind tibife with a few sparse 



__ hairs Ephuta, Say. 



