April, '03] ENTOMOLOGICAL NEWS. IO5 



the genera here recognized will be found to infest the nests of 

 different genera of that subfamily. 



FEMALES. 

 Mandibles yellowish or reddish, the tip darker ; small or middle sized, 3. 

 Mandibles rufous, base usually largely black ; large or middle sized, i. 



1. Mandibles simple ; labrum long, strongly notched ; mesonotum closely 



punctured ; segments 4-5 more or less black ; vein rm. short 



Drepanium falciferum. 

 Mandibles dentate ; labrum short, rounded or truncate 2. 



2. Joint 4=2+3, or nearly ; abdomen narrow, evenly, coarsely, distinctly 



punctured, entirely red, segment 5=4, or longer ; clypeus 

 finely and densely punctured : mesonotum coarsely and closely 

 punctured ; cell III-, strongly narrowed above. 



Proteraner ranunculi. 



3. Mandibles dentate. Sphecodium. 



Mandibles simple 4. 



4. Vein rm wanting ; clypeus short, flat ; mandibles long ; mesonotum 



shining, greenish, finely and sparsely punctured ; metathorax 

 short, enclosure poorly defined, with longitudinal raised lines. 



Dialonia antennariae. 

 Vein rm present ; clypeus longer, more convex MdChaeris. 



MALES. 

 Joint 4 longer than 2-}-3, which are equal ; abdomen red, except some- 

 times at base, apex broadly rounded . . Proterauer ranunculi. 



Joint 4 hardly longer than 3 2. 



Joint 4 about equals 2-I-3 i. 



1. Joint 3 twice as long as 2 ; flagellum notched beneath towards apex ; 



mesonotum closely punctured ; mandibles red ; vein rm short; 

 abdomen black, segment 7 red, at least at apex. 



Drepanium falciferum. 

 Joint 3 not twice as long as 2 ; vein rm little shorter than III 5. 



Sphecodes. 



2. Clypeus; vein rm wanting; metathorax smooth, shining, with some 



longitudinal raised lines Dialonia antennariae. 



Clypeus convex ; vein rm usually present. . Sphecodium or Machaeris. 



SPHECODES Latr. 

 FEMALES. 



Vertex with a distinct tubercle ; mesonotum closely and coarsely punc- 

 tured ; abdomen finely and sparsely punctured, segments 4-5 

 black heraclei. 



Vertex ordinary i. 



