82 ENTOMOLOGICAL SOCIETY 



campestris Van Duzee, and Liburnia lutulenta Van Duzee, 

 Columbus, Ohio. 



TABLE OF SUPERFAMILIES — FEMALES. 



1. Cephalothoracic spiracles more or less easily discernible, generally 



prominent; four or five median unpaired genital tubes entering 



brood canal Xenoidea, n. superf. 



Cephalothoracic spiracles not usually discernible, never prominent.. 2 



2. Tubercles of head apical Halictophagoidea, n. superf. 



Tubercles of head more or less obsolete, ventral ; only three genital 



tubes entering brood canal Elenchoidea, n. superf. 



TABLE OF GENERA — FEMALES. 

 Superfamily Xenoidea Pierce. 



1. Head considerably narrower than metathorax at spiracles 2 



Head not considerably narrower than metathorax at spiracles 5 



2. Hylechthridae. Head not more than one-half as wide as metathorax 



at spiracles; lateral lobes of mesothorax indicating presence of 

 supposed mesothoracic spiracles (auct. Saunders) ; lower lip 

 (ventral) overhanging transverse slit, mandibles merely lobes. 



Hylechthrus Saunders. 



Head often much less than one-half as wide as the metathorax; no 



lateral lobes indicating presence of suppressed mesothoracic 



spiracles 3 



3. Head about one-third width of metathorax at spiracles 4 



Stylopidae. Cephalothorax broadly truncate or rounded at apex; 



head about one-half width of metathorax at spiracles; five 

 genital tubes entering brood canal Stylo ps Kirby. 



4. Xenidse. Halictoxeninse, n. subf. Cephalothorax almost triangular, 



lateral margins sinuate, five genital tubes entering brood 



canal Halictoxenos, n. gen. 



Type of genus, Halictoxenos jonesi, n. sp., parasitic on Halictiis 

 (Chloralictus) sparsus Rob., Louisiana. 



5. ? Crawfordinse, n. subf. Cephalothorax with lateral lines extending 



from mandibles to spiracles Crawfordia, n. gen. 



Xeninse, Homilopinse, n. subflf. Cephalothorax with head extending 

 laterally not more than two-thirds of the distance to the spiracles, 

 four genital tubes entering brood canal, 



Acroschismus, Homilops, n. gg. 



Superfamily Halictophagoidea Pierce. 



I. Transverse slit on cephalothorax narrow 2 



Head subtruncate at apex, transverse slit very broad, cutting a deep 



