BRUES: PARASITIC HYMENOPTERA. 



59 



However, the flattened antennal flagellum should make the species 

 readily recognizable, as this character occurs only in isolated genera 

 of the Ichneumonidae. On account of this peculiarity I dislike to 

 leave it undescribed. 



Tryphon cadaver, sp. nov. (Fig. 4.3.) 



Female. Length 4.5 mm. Black; the legs and second and third segments 

 of abdomen pale brownish or reddish, except the base of the third which is 

 piceous; apical segment of abdomen dark brown. Head smooth, not punc- 

 tate, shining. Antennae three-fourths the length of the body; rather slender; 

 about 22-jointed, although some of the articulations are obliterated; first 

 flagellar joint over three times as long as thick; those near the middle not 

 quite twice as long as thick ; near the apex scarcely longer than wide. Mesono- 

 tum shining, distinctly punctate 

 toward the posterior margin; par- 

 apsidal furrows entire, deep and 

 distinct. Metanotum shining, com- 

 pletely areolated. Abdomen 

 broadly sessile, first segment only 

 one-fourth or one-third longer than 

 wide at tip, strongly raised medially ; 

 on its basal half with two discal 

 carinae which strongly converge and 

 fade out at the middle. Lateral 

 carinae complete, very close to the 

 margin; spiracles placed distinctly 

 before the middle. Second seg- 

 ment two-thirds as long as the first 

 and twice as wide as long; third to 

 fourth gradually shorter and wider; 



fifth segment the widest. Legs rather stout, at least the posterior pair. 

 Wings hyaline, stigma and veins light brown. Stigma broad, subtriangular ; 

 marginal cell small; second section of the radius nearly three times as long 

 as the first. Submedian cell considerably longer than the median, the trans- 

 verse median vein very oblique; cubitodiscoidal cell rather short. Areolet 

 present, but neither of the transverse cubiti very strongly colored; first 

 recurrent nervure broken considerably below the middle. 



Tijpe.— No. 2236, M. C. Z., Florissant, Col. (No. 8176, S. H. 

 Scudder Coll.). 



Fig. 43. — Tryphon cadaver, sp. nov. Type. 



