NO. 2334. 'north AMERICAN ICHNEUM0N-FLIE8—CUSHMAN. 263 



covered with long, shining, white pubescence; clypeiis deeply trans- 

 versely impressed before apex; malar space very short; cheeks very 

 narrow; antennae slender, first flagellar joint much longer than sec- 

 ond, wliich is subequal with the third; thorax clothed with rather 

 long pubescence; notauli deep, terminating abruptly just before the 

 scutellar groove; sternauli complete; propodeum with petiolar and 

 posterior lateral areas confluent, othenNdse completely areolated, 

 with dense, long pubescence, the areola large, broadly hexagonal; 

 wings broad; stigma and radial cell broad; areolet with the third 

 abscissa of cubitus forming its shortest side, second intercubitus 

 largely bullated but distinct; nerveflus unbroken; legs slender, hind 

 tibia slightly swollen near base, first tarsal joint nearly as long as the 

 other four combined; the last much shorter than third; abdomen 

 rather slender, broadest much behind the middle; first tergite sub- 

 linear, postpetiole but little wider than petiole, spiracles nearly at 

 the middle; second tergite narrow at base, much broader at apex, as 

 long as first tergite, or nearly, gastrocoeli distant from base; other 

 tergites transverse, those beyond the fifth in female retracted; abdo- 

 men with a median pale mark beginning on apex of postpetiole, 

 broadening out at the apex of each segment to the full width of the 

 segment, and extending to the apex, segments beyond second some- 

 times entirely reddish; ovipositor sheath subequal in length to first 

 tergite. 



THYSIOTORUS? SMITHI. new species. 



Female. — Length, 5 mm.; antennae, 3.5 mm.; front wing, 4 mm. 



Head and thorax polished, practically impunctate; malar space 

 hardly half as long as basal width of mandible; propodeum opaque; 

 areola nearly equilaterally hexagonal; first tergite with spiracles 

 very slightly beyond middle; postpetiole paraUel-sided, longitudi- 

 nally striate; second tergite striate nearly to apex, third striate in 

 basal half; ovipositor sheath almost exactly as long as first tergite. 



Black, with the usual pale tergal mark; antennae pale at base; 

 mandibles pale; palpi tegulae and front and middle coxae and tro- 

 chanters whitish; legs otherwise stramineous, except hind femur, 

 which is pale testaceous, its tibia, which is infuscate especiall}^ at base 

 and apex, and its tarsus which is fuscous; wings hyaline, venation 

 blackish. 



Male. — Very similar to female. 



Type.— C&t No. 22855, U.S.N.M. 



Described from six females and two males, all collected by the late 

 H. H. Smith, for whom the species is named. The series shows some 

 minor variation in size, in the shape of the areola of the propodeum, 

 and in the extent of the pale tergal mark. The last sometimes begins 

 on the apex of the postpetiole and sometimes on the second tergite, 

 the amount of black laterally corresponding. 



