No.i20fi. ICHNEUMON FLIES— ASHMEAD. 201 



acute, cnltrifonn or lanciM date; f)viposit( >!• h my;, promineutly exserted ; 

 male always apterous, the head anteriorly with a dtn'p triangular 

 fovea, in which are placed the short 8-9-jointed antennae; the abdo- 

 men in the male is always long and tubular, thickened at base. 



Family LX. Agaonidje. 

 Head rarely oblong and (juite differently formed, never with a deep broad longi- 

 tudinal furrow above, most frequently transverse, or sulxpiadrate, 

 the occipital margin never with a small recurve<l spine; mandibles 

 and j)alpi without saw-like appendages; middle legs not especially 

 slender, the anterior and posterior legs are often stout, but their 

 tibia? are always longer, at least never shorter, than their femora; 

 hypopygiiun rarely very prominent; male most frecjuently winged, 

 rarely apterous; in the latter case the abdomen is normal, not long 

 and tubular. 



Mesopleura large, entire, without a femoral furrow, except occasionally in 

 some males, the mesepisternum large, triangular, not extending to 

 base of front cox;e; middle tibial spur saltatorial, most frequently 

 long and stout, or dilated at base 8 



Mesopleura always with a femoral furrow or impression, the mesepisternum 

 variable, rarely large, except in the Cleonymidw, most frequently 

 small, wedge-shaped, or linear and extending to base of front coxae; 

 if large and triangular, either the anterior or posterior femora are 

 much swollen; middle tibial spur not saltatorial, usually short or 

 weak, never very stout. 

 Hind tibiaj with 2 apical spurs, rarely with 1 only; in the latter case the 

 radius terminates in a large, rounded stigma, the ovipositor very 



long - 4 



Hind tibiae with 1 apical spur; ovipositor rarely long, if long the stigma is 



small 9 



4. IVIandibles falcate, usually with 1 or 2 teeth within; thorax most frequently very 

 gibbous, the scutellvmi usually very large, often abnormally devel- 

 oped, elevated and produced posteriorly, the axillae connate, not 

 distinctly separated from the surrounding surface and broadly 



united along their inner margins 6 



Mandibles usually 3—1 dentate at apex; rarely falcate, with 1 or 2 teeth within; 

 thorax not or very slightly gil)bous, the axillae distinctly separate, 

 their mner margins most frequently widely separated, very rarely 

 touching." 



Hind coxae rarely much larger than the anterior coxae, most frequently smaller 

 or equal; if much larger, the pronotum is elongate, mesepisternum 

 large, the hind legs very long, the postmarginal vein very long; 

 ovipositor very rarely prominent 5 



Hind coxae very large and long, usually five or six times larger than the 

 anterior cox;e. 

 Hind coxae subtriquetrous, or at least compressed into a sharp ridge above; 

 hind femora never very nnich sw^ollen, and most fn^piently simple, 

 rarely with one large tooth or denticulate beneath; abdomen most 

 frequently subcompressed (more rarely depressed), with a long 

 ovipositor; if without an exserted ovipositor, the abdomen is con- 

 ical or conic-ovate with a jieculiar sculpture, the radius (stigmal 

 vein) usually very short, the hind tibi;e at apex normal. 



Family LXI. Tokymid.^. 



Hind coxae usually very long and subeylindrical, rarely triquetrous; hind 



femora ahyays nmch swollen and most frequently armed with teeth 



