Vol. XXVJii] ENTOMOLOGICAL NEWS. 397 



Antennae black, scape and pedicel yellow. Abdomen long and 

 conical, stylate at apex, distinctly longer than the rest of the 

 body. Propodeum finely punctate, with a coarse spiracular sul- 

 cus, a median carina and a large, rounded fovea nearer the 

 spiracle than to meson and near cephalic margin. Spiracle oval, 

 moderate in size, more cephalad. Mandibles 3- and 4- dentate, 

 the last tooth truncate. Funicle joints elongate, the pedicel short. 

 Segment 2 of abdomen entire. Postmarginal vein elongate, sub- 

 equal to the marginal. Length 5 mm.... conicus new species. 

 Coxae and femora (except broadly) at apex, concolorous; antennae 



entirely concolorous; abdomen shorter, nonstylate. 

 Clypeus with three conspicuous teeth; mandibles tridentate, the 

 last tooth broad and truncate. Propodeum strongly tricarinate, 

 with three abbreviated rugae from cephalad between median 

 and lateral carinae; spiracle moderate in size, oval, cephalad. 

 Segment 2 of abdomen occupying a third of the surface, glab- 

 rous, slightly emarginate at meson caudad, rest of body densely 

 scaly. Venation as in conicus. Pedicel as long as funicle 6; 

 funicle I wider distad, twice longer than wide, 2 somewhat 

 shorter, 3 and 4 each a fourth longer than wide. Length 3 mm. 



nonstylatus new species. 



Trigonoderus aigonquinia n. sp. 



Two females, Algonquin, Illinois (W. A. Nason). 



Type : Catalogue No. 20899, U. S. National Museum, the 

 specimens pinned and on a tag, a slide bearing appendages. 



Trigonoderus unguttus n. sp. 



One female, Bladensburg, Maryland, September (W. H. 

 Ashmead). 



Type : Catalogue No. 20900, U. S. National Museum, the 

 female on a tag, appendages on a slide. 



Trigonoderus conicus n. sp. 



One female, Arizona (E. A. Schwarz). 



Type : Catalogue No. 20902, U. S. National Museum, the 

 female on a tag plus a slide. 



Trigonoderus nonstylatus n. sp. 



Parasitic on a cecidomyiid, Eastern U. S. One female. 



Type: Catalogue No. 20903, U. S. National Museum, a 

 female on a tag, appendages on a slide-. 



The types of ac</eriae have not been seen. 



