THE CANADIAN ENTOMOLOGIST. 



2. Front wings with only two cubital cells 3. 



Front vyings with three cubital cells, or the third partially formed. . 7. 



3. Marginal cell at apex broadly truncate 4. 



Marginal cell at apex pointed or rounded, never truncate. 



4. Mandibles at apex broad and 3-dentate 5. 



Mandibles at apex never broad nor 3-dentate, "at the most bidentate 6. 



5. Body bare, or nearly ; second dorsal abdominal segment not black, 



red or marked with red or yellow spots, (North and South 



America.) Sphaerophthalma, Blake. 



= Traumatomutilla, Andre. 



(Type S. scaeva, Blake.) 



Body not bare or nearly, usually very hairy or pubescent \ second 



dorsal abdominal segment usually black or unicolorous, not spotted 



with red or yellow. (North and South 



America) Dasymutilla, Ashmead. 



(Type Sphaeroph.'gorgon, Blake.) 



6. Body well pubescent or hairy, the abdomen black, with a white 



hair-band ; first joint of the flagellum shorter than the second. 



(South America.) Reedia, Ashm., gen. nov, 



(Type Mutilla atripennis, Spinola.) 



7. Thorax obpyriform or obova'te, or at least always narrowed 



posteriorly. 



Mandibles at apex not 3-dentate, edentate, or with a smalt tooth 



within some distance from the apex, or bidentate 8. 



Mandibles at apex obliquely truncate and 3-dentate. 



First joint of the flagellum obconical, but not twice as long as 

 the second ; head and thorax usually black, with a sparse 

 black pubescence, rarely with the head red ; second 

 abdominal segment mostly red. . . .Pycnomutilla, Ashmead. 



8. Body bare or nearly, never densely pubescent, or hairy, usually 



rugosely punctured; scape rather long, slightly bent, the first 

 joint of the flagellum longer than the second ; second abdominal 

 segment marked with from 2 to 4 red or yellow spots, rarely, 



immaculate ; . . Sphaerophthalma, Blake. 



= Traumatomutilla, Andre. 

 Body 7iot bare, but clothed with dense long hairs or densely 

 pubescent, or the head and thorax above with a dense pubescence ; 

 second abdominal segment usually black or the dertna not spotted, 

 although the segment is sometimes spotted with two or more 

 pubescent spots Dasymutilla, Ashmead. 



