168 AMERICAN HYMENOPTERA. 



In structure and size entirely like O. pugillator ; head with antennae 

 black ; thorax fuscous, immaculate. Abdomen compressed, falcate ; 

 apex truncate, black; ovipositor short, exserted. Wings fuscous, with 

 two small hyaline spots in the anterior part. 



Olivier gives a similar description, but Mr. E. T. Cres- 

 son believes that it "is probably Tragus exesorius Br." 



Ophion qiiadrator Fabr. 



Ophion quadrat or YsihrxciVi^, Syst. Piez., p. 137, n. 32 1804. 



Olivier, Encycl. Meth., Ins., VIII, p. 514, n. 39..1811. 

 Ichneumon quadrator Thunberg, Bull. Acad. Sci. St, Petersbourg, 



VIII, p. 262 1822. 



" " Thunberg, Mem. Acad. Sci. St. Petersbourg, 



IX, p. 315 1824. 



Ophion " Dalla Torre, Cat. Hym., Ill, p. 198, Amer. 



Mer 1901. 



" " Szepligeti, Gen. Ins., Hym., 34nie Fasc, p. 



32, n. 108 1905. 



Fiavous ; second abdominal segm.ent black, apex of wings black. 



Habitat. — Amer. Merid. 



Smaller than the preceding, O. diinidiator. Head flavous ; antennae 

 black, the first segment flavous. Thorax immaculate flavous. 



Abdomen petiolate, falcate, slender; the first segment obscure ferru- 

 ginous, the second black, the third black above, the rest flavous. 



Wings hyaline, apex black ; feet flavous, the posterior black. 



This description is too indefinite to make recognition pos- 

 sible. 



Ophion quaestor Fabr. 



ophion qucestor Fabricius, Syst. Piez., p. 132, n. 6 1804. 



Olivier, Encycl. Meth., Ins., VIII, p. 510, n. 10.... 1811. 

 Ichneumon qucestor Thunberg, Bull. Acad. Sci. St. Petersbourg, 



VIII, p. 259 1822. 



" " Thunberg, Mem. Acad. Sci. St. Petersbourg, 



IX, p. 307 1824. 



Ophion " Dalla Torre, Cat. Hym., Ill, p. 198, Amer. 



Mer 1901. 



" " Szepligeti, Gen. Ins., Hym., 34nie Fasc, p. 



32, n. 109 1905. 



Flavous ; thorax with three oval raised fuscous tubercles. 



Habitat. — Amer. Merid. 



A little smaller than luteus. Head flavous; antennas darker, the 

 first segment flavous ; thorax flavous, with three anterior, raised, 

 oval fuscous tubercles ; abdomen petiolate, falcate, flavous, apex trun- 



