460 FROCEEDINQS OF THE NATIONAL MUSEUM. vol.54. 



5. 0. calif omica Pierce; parasite of Panurginus calif omicus Cres- 



son; Calif ronia. 



6. C. labrosiformidis Pierce; parasite of Panurginus lahrosiformis 



Kobertson; Illinois. 



1. CRAWFORDIA PULVINIPES Pierce. 



EiTata : Gen. Insect., p. 23, line 13, add " PI. 2, unmimbered figure." 



Subfamily Xeninae Pierce. 



1. Anterior edges of sontelluni convergent, not parallel ; wings with eight 



primary veins fi'oin base 2. 



Anterior edges of scutellum pai*allel or almost so 3. 



2. Parasites of Vespidae. Wings with radius sometimes indistinct, radius 



sometimes broken for a short distance, one detached vein between radius 



and medius 1. Xenini Pierce. 



Parasites of Eumenidae. Wings with two detached veins between radius 

 and medius 2. Pseiidoxenini Pierce. 



3. ]Metathoracic postlumbium spindle-shaped, constricted at middle. Parasites 



of Larrldae 3. Tachytixenini Pierce. 



IMetathoracic postlumbium not constricted at middle 4. 



4. Parasites of Sphecidae. Wings with two detached veins between radius 



and medius. jind one between medius and cubitus. 



4. OphthahiiocJdini Pierce. 



Parasites of Bembecidae. Wings with two detached veins between radius 



and medius o. Pardxcnini Pierce. 



1. Tribe XENINI Pierce 



1. Triungulinid with two apical stylets 2. 



Triungulinid with four apical stylets. Parasites of Belonogaster. 



19. Belonogastechthrus Pierce. 



2. Parasites of Polistes 17. Xenos liossi. 



Parasites of Vespa 18. Vespaexenos Pierce. 



17. Genus XENOS Rossi, 1793. 



Xenops Leach 1815, 1830, in Brewster's Edinburgh, Encyclopedia, vol. 9, 

 pp. 117, 1187. A'", peckii Kirby, X. rossi Kirby {vesparum Rossi). 



Errata: Bull. 66, p. 116, lines 16, 19, 23, read "1793" for "1790." Gen. 

 Insect, p. 24, line 28, read "1794" for "1793"; p. 26, line 14, read 

 " 114 " for " 14 " ; p. 52, lines 18, 19, read " 6 " for " 5." 



Gen. Insect, pp. 25, 26, unnumbered figures on plate 1 are not men- 

 tioned for X. hotvditchi, pallidus, pecosensis, ivheeleri, or vesparum, 

 and unnumbered figures on plate 2 are not mentioned for X. huhhardi 

 or jurinei. 



LIST OF SPECIES OK XENOS. 



1. X. auriferi Pierce; parasite of Polistes aurifer Saussure; Cali- 

 fornia. 



2. X. bowditchi Pierce ; parasite of P. pallipes Lepeletier ; Massa- 

 chusetts, Ohio. 



