1908] COOLIDGE — NORTH AMERICAN PSEUDOSCORPIONIDA 113 



Sub-family Obisiinae 

 Tribe Ideobisiinae 



Ideobismm threventi Simon * 



Simon, Ann. Soc. Ent. Fr., 1878. (Obisium threventi.) 



A common western species, reported from California, Oregon, Washington and 

 Arizona. 

 Ideobisium rufulum Banks. 



Banks, Can. Ent. XXIII, 166, 1891. {Olpium rufulum.) 



Washington, D. C, and Virginia. 

 Ideoroncus obscurus Banks. 



Banks, Can. Ent. XXV, 66, 1893. 



Banks, Journ. N. Y. Ent. Soc. 3, 11, 1895. 



Washington, Montana and California. 



Tribe Obisini. 



Obisium cavicala Packard. 



Packard, Am. Nat., Febr., 1884. 



Banks, Journ. N. Y. Ent. Soc. 3, 11, 1895. 



From New Market Cave, Virginia. 

 Obisium brunneum Hagen. 



Hagen, Rec. Am. Ent., 1868. 



Banks, Journ. N. Y. Ent. Soc. 3, 11, 1895. 



An abundant species in the northern states. 

 Obisium parvulum Banks. 



Banks, Journ. N. Y. Ent. soc. 3, 12, 1895. 



Florida? 

 Obisium macilentum Simon. 



Simon, Ann. Soc. Ent. Fr., 1878 



Southern California. 

 Obisium carolinensis Banks. 



Banks, Journ. N. Y. Ent. Soc. 3, 12, 1895. 



North Carolina and Lee County, Virginia. 

 Blothrus californicus Banks. 



Banks, Can. Ent. XXIII, 165, 1891. (Atemnus californicus.) 



Inhabits California. 



