CHARLES W. HOOKER. 159 



Pimpla atrata Dalman, Svensk. Vet. Akad. Handl., 46, p. 188, 



pi. 1 1825. 



Rhyssa " Brulle, Hist. Nat. Ins., Hym., IV, p. 77, n. 1, pi. 



40, f. 1.... 1846. 



Thalessa " Provancher, Nat. Can., XII, p. 13, n. 1 1880. 



Megarhyssa atrata Dalla Torre, Cat. Hym., Ill, p. 479, Canada; 



United States 1901. 



This species is common throughout the United States and 

 recognized as belonging to the Genus Megarhyssa. 



Ophioii bracliiator Say. 

 Ophion brachiator Say, Boston Journ. Nat. Hist., I, p. 240, n. 5. .1835. 

 Le Conte, Writ. Th. Say, Entom., II, p. 695....1859. 

 Dalla Torre, Cat. Hym., Ill, p. 188, America, 



Indiana 1905. 



' ' Black ; abdomen and feet yellowish ; a petiolated second cubital 

 cellule. 



" Length, nine-twentieths of an inch. 



" Antennae, first joint beneath, white; mandibles whitish, piceous at 

 the tip ; palpi white ; wings hyaline ; stigma slender, blackish; second 

 cubital cellule rather large, quadrangular, more or less petiolated from 

 the radial cellule ; anterior recurrent nervure a little arcuate, not 

 angulated and with a white bulla ; second recurrent nervure rectili- 

 near, with a white bulla ; metathorax with an impressed longitudinal 

 line and a transverse raised one at base ; abdomen honey-yellow ; first 

 joint white at base, second joint blackish above ; feet, posterior pair 

 honey-yellow, tarsi blackish ; intermediate pair white, with honey- 

 yellow thighs ; anterior pair white." 



Say adds : "I place this in the Genus Ophion because of 

 the compressed falcate abdomen, notwithstanding the exist- 

 ence of the second cubital cellule." The species evidently 

 does not belong in this genus, nor even in this tribe. 



Distribution. — Indiana. 



Ophion cliloris Oliv. 



Ophion chloris Olivier, Encycl. Meth., Ins., VIII, p. 509, n. 4 1811. 



Paniscus chloris Norton, Proc. Ent. Soc. Phila., I, p. 364, n. 27. ..1863. 



This species is undoubtedly a member of the Genus Pa7iis- 

 C71S, aud Norton states that " There is very little doubt that 

 this is the O. geminatus of Say." Dalla Torre, however, 

 preserves both species. 



TRANS. AM. KNT. SOC, XXXVIII. 



