Ko. 2317. FIVE TRIBES OF ICHNEOMONINAE—BOHWER. 461 



(somewhat coarser on metapleura and propodeum) and clothed 

 with dense, minute pubescense; wings hyaline, irridescent; propo- 

 deum with median furrow and slightly angulate laterally; abdomen 

 very slender the first tergite more than three times as long as wide, its 

 spiracles subprominent; abdomen granularly punctured and finely 

 pubescent." 



Heavily chitinized part of first sternite fully two-thirds as long as 

 the first tergite. 



Canada; New Jersey (Cresson); Great Falls, Virginia; Oswego, 

 New York; and a specimen which is probably the same species from 

 CoUins, Idaho (C. V. Piper). 



POEMENIA AMERICANA (Cresson). 



Euxoridcs aviericana Cresson, Trans, .^mer. Ent. Soc., vol. 3, 1870, p. 167. 



Type. — Cat. No. 1517, Acad. Nat. Sci. Philadelphia. Notes taken 

 from type and specimens listed below. 



The short ovipositor makes this species easily recognized. Tlie 

 heavily chitinized part of the first sternite about half as long as the 

 first tergite. 



Texas; Connecticut; Pennsylvania (Cresson); Morgan town. West 

 Virginia (A. D. Hopkins); Colorado (Baker); Del Norte, California 

 (P. D. Scrgciit); Ashland, Oregon (J. M. Miller). 



Host. — Paratimia conicola and Laspeyresia toreuta. This last rec- 

 ord may be an error and Paratimia have been the host. From rear- 

 ing by Branch of Forest Insects, Bureau of Entomology. 



Tribe ODONTOMEEINI Cushman and Bohwer. 



Odonlomerini Cushman and Rohwer, Proc. U. S. Nat. Mus., vol. 57, 1920, p. 396. 



The two genera belonging to the tribe Odontomerini have here- 

 tofore been assigned to the tribe Xoridini, and although they are 

 undoubtedly allied to this group through Xorides, they can easily 

 be distinguished from it by the apically bidentate mandibles. The 

 Odontomerini not only show affinity to the Xoridini, but they have 

 considerable in common with the Acoenitini and are allied to this 

 group through Arotes. 



The hosts of the Odontomerini, as far as known, are the larvae of 

 wood-boring Coleoptera, most of which belong to the families Ceram- 

 bycidae and Buprestidae. Although many of the species are well 

 represented in the National Collection, it seems likely that we have 

 only a meager knowledge of the group as it really exists and that 

 further collecting and rearing will bring to light undescribed species, 

 and v/ill materially increase our knowledge of the habits of the species. 



Tribal characters. — Head cubical, swollen below the antennae 

 eyes small and placed well forward; posterior orbits wider than or 

 subequal with the diameter of the eye; head not narrowed behind; 



