294 NEOTROPICAL PSELAPHIDAE 



This generic distribution pattern is exceptional in pselaphids, and indi- 

 cates that the genus has dispersed southward from a nearctic center. A com- 

 moner pattern is the reverse situation, with species dispersing northward from 

 a neotropical center. The scant representation of Ctenistini in the neotropics 

 is additional indirect evidence that this tribe originated elsewhere. 



major Mann. 1914. San Miguel, Mexico, con Prenolepis (Nylanderia) 



mexicana Forel. 



zimmermani (LeConte). 1850. {Ctenistes auct. nee Reichenbach) 

 United States (Indiana south to Florida, 

 Georgia and Louisiana) ; Mexico; Colombia; 

 Amazon basin, Brazil!? 



CTENISODES (Raffray, 1897) 



Raffray (1897, 1904, 1908) 



Erected on a female specimen, 1.6 mm. long, with unique maxillary palpi. 

 The genus approaches Ctenisis. Unfortunately the male sex is unknown. It 

 has not been recorded for forty-four years and I am happy to report another 

 specimen of this genus and what I consider the same species. The new record 

 indicates that the genus may be a synoekete in the ant society. 



laticeps Raffray. 1897. Mexico. Genotype. 



I have a single female from Montemorelos, Nuevo 

 Leon, Mexico, taken June 16, 1941, by Charles Seevers 

 with ants. The host is being determined. 



