ICHNEUMON-FLIES, PART 2 1 NORIDINAE 459 



Nearctic species described below; the European Odontomerus rufi- 

 ventris Holmgren 1860, 0. hungaricus Clement 1938, 0. spinipes 

 Gravenhorst 1829, 0. geniculatus Kriechbaumer 1889, 0. pinetorum 

 Thomson 1877, and 0. punctulatus Thomson 1877; the Japanese 

 0. nikkoensis Ashmead 1906 and 0. rufus Uchida 1928; 0. stejnegeri 

 Cushman 1924, from Robbin Island in the Okhotsk Sea; and four 

 undescribed species from Japan. 



6. Odontocolon depressum, new species 



Male: Unknown. 



Female type: Front wing 7.7 mm. long; nagellum with 33 segments, 

 its first segment 1.11 as long as second; head exactly the same width 

 across temples as across eyes; punctures on temple small, separated 

 by about 3 times their diameter; thorax about 2.8 as long as high; 

 pronotum covered with rather small close punctures except in and 

 just below the trough, in the trough with short irregular transverse 

 wrinkles, just below the trough with weak irregular wrinkles; punc- 

 tures on mesoscutum exceptionally small, sharp, separated by about 

 2.0 their diameter; mesepimeron with rather dense hairs on its upper 

 0.5, the lower 0.5 with only a very few scattered hairs; metapleurum 

 with rather close, weak punctures that are partially obscured by weak 

 wrinkling; petiolar area 0.31 as long as combined areola and basal area; 

 propodeal teeth about 0.3 as long as their basal width; first lateral 

 area covered with short dense hairs; hind femur 2.4 as long as deep, 

 covered all over with fine subadjacent punctures, the hairs very short; 

 tooth on hind femur exceptionally narrow in profile, on its distal 

 side ending abruptly, without a ridge continuing on to under side of 

 femur (in this way differing from other Nearctic species of the mellipes 

 group); second segment of middle tarsus 1.6 as long as deep; fifth 

 segment of hind tarsus exactly as long as second segment; first tergite 

 exceptionally short; second tergite smooth, polished, its hair sockets 

 separated mostly by about twice the length of the hairs but denser 

 near lateral margin; ovipositor sheath 2.1 as long as front wing. 



Black. Ventrolateral part of face reddish brown; underside of 

 scape, pedicel and first flagellar segment stained with reddish brown; 

 labrum and palpi brown ; tegula black ; legs uniformly f ulvof erruginous ; 

 apical 0.4 of first tergite largely reddish brown; wings subhyaline. 



This species is recognizable by its depressed shape, long ovipositor, 

 and shape of the tooth on the hind femur. Its nearest known relative 

 is an undescribed species from the Japan Alps. 



Type: 9, Phantom Valley, 9,400 ft., Rocky Mountain National 

 Park, Colo., Aug. 9, 1948, H., M., D., and J. Townes (Washington, 

 USNM 63724). 



