196 E. T. CRESSON. 



abdomen depressed, postpetiole and three following segments above coarsely, 

 longitudinally aciculated. Length .70 inch. 



Hah. — Texas. (F. H. Strecker). Easily distinguished by the 

 beautifully oruamented wings. 



4. flavipennis, Cress. Proc. Eat. Soc. Phil, iii, p. 287. 



Hah. — Colorado. Head, antennae except tips, tegulae, scutellura, an- 

 terior femora, and all the tibiae and tarsi, fulvo-ferruginous ; tips of 

 antennae, thorax, coxae, posterior femora and first abdominal segment 

 except tip, black ; wings yellow, apical margins smoky ; abdomen yel- 

 low, postpetiole and second segment fulvous. Length % .70 inch. 



5. exesorius, Brulle, Hym. p. 298. 



Hah. — Can., N. Y., Pa., Del., G-a., 111. Entirely fulvo-ferruginous, 

 legs paler, tibiae and tarsi golden-yellow; antennae sometimes dusky 

 or black above; wings uniformly fuliginous, with a strong aeneous or 

 violaceous reflection. Length S 9 .70 — .80 inch. 



This will probably prove to be the Ichneumon pennator, Fabr. Ent. 

 Syst. ii, p. 155. 



§§ 



6. atrocseruleus, Cress. Trans. Am. Ent. Soc. ii, p. 92, 9 . 



Hah. — Louisiana, (coll. Norton). Opaque blue-black, immaculate ; 

 •wings blackish fuliginous, with a brilliant violaceous reflection ; fourth 

 and following segments of abdomen smooth and polished. Length 9 

 .80 inch. 



7. obsidianator, Brulle, Hym. p. 299. 



Hah. — Pa., 111., Ga., Tex. Deep black, immaculate; antennae 

 orange-yellow ; wings uniformly blackish-fuliginous, with a strong 

 Eeneous reflection; first abdominal segment bicarinate, the carinae 

 becoming obsolete before reaching the tip. Length % 9 .80 — .90 

 inch. 



8. Brullei, n. sp. 



% 9- — Differs {rom obsidianator principally by the first abdominal segment 

 being strongly elevated and subpyramidal before apex; the anterior margin of 

 clypeus is slightly produced in middle, while in obsidianator it is more or less 

 concave, sometimes broadly emarginate; the abdominal segments are also more 

 finely punctured. Length % 9 -85 — 1-10 inch. 



Hah.— Ct, Pa., Ga. 



9. marginipennis, Cress. Trans. Am. Ent. Soc. ii, p. 93, % . 

 Hah. — I >;ikota Territory. Black, immaculate; wings yellow, with 



apex broadly pale fuliginous; first abdominal segment not elevated 

 before apex. Length S .72 inch. 



