80 ENTOMOLOGICAL SOCIETY 



wheeleri, n. nom. pro Xenos peckii Brues, 1903, nee Kirby, 

 1813, parasitic on Polistes metricus Say, Connecticut. 

 One distal unattached vein between third and fourth primaries, 

 one between fourth and fifth ; oedeagus cleft at apex, 



Schistosiphon, n. gen. 

 Type of genus, Xenos peckii Kirby, 1813, parasitic on Polistes 

 fuscatus Fab., Newbury, Mass. 



Subfamily Homilopinse Pierce. 



12. Genitalia consisting merely of a two-jointed plate-like exserted 



appendage (ninth and tenth segments), cedeagus not visible 



(according to Templeton) Homilops, n. gen. 



Type of genus, Xenos westwoodi Templeton, 1838, parasitic on 

 Proterosphex (Sphex) ichneuinoneus aurifltms Perty {auro- 

 capilla Tempi.), Brazil. 



Subfamily Crawfordinae Pierce. 



13. CEdeagus not reflexed, nor bounded at base by claws, very narrow 



at base, vesiculate and bent at middle, tenuate and very acute 

 at apex; wings having five primary veins from base, the 



fifth branched Craivfordia, n. gen. 



Type of genus, Xenos pulvinipes Pierce, 1904, parasitic on 

 Panurginus sp., West Point, Nebr. 



Family VI. Halictophagid^ Pierce. 



1. Prothorax band-like, not interrupted.' 2 



Prothorax disc-like, interrupted laterally by the mesothorax 5 



2. Prothorax simple, not arched forward ; wings having six primary 



veins from base, with two distal unattached veins between the 



second and third 3 



Prothorax and mesothorax arched forward, fitting into excavation 

 of head 4 



3. Third primary vein simple Pentacladocera, n. gen. 



Type of genus, Halictophagus schwarsi Perkins, 1905, parasitic 



on Agallia sp.. New South Wales. 

 Third primary vein broken, or with unattached vein commencing 



just before the apex on its anal side. Halictophagus Dale, 1832. 

 Type of genus, Halictophagus curtisii Dale, England. 



4. CEdeagus large at base, acute and greatly reflexed at apex ; wings 



with six primary veins from base, with two distal unattached 



veins between the second and third, and with the third 



primary vein branched apically. Pentoxocera, n. nom. pro 



Bruesia Perkins, 1905 ; nee Ashmead, 1903. 



