OF WASHINGTON. 75 



mens in the cabinet of Mr. H. Ulke, collected by Mr. Titus 

 Ulke in the Black Hills of South Dakota, with a Lasius claviger. 

 Tyrus corticinus Cas. Numerous specimens were found by 

 Mr. Hubbard and myself with Formica sanguined * in a de 

 cayed pine log above Alta, in the Wahsatch Mountains of Utah, 

 at an elevation of about 10,000 feet. 



Ctenistcs pulvereus Lee. Found with Formica schaufussii 

 at Tucson, Ariz., by Mr. Wickham (Psyche, 6, 1892, p. 321). 



Arianops amblyoponica Brend. This blind species, the 

 largest Pselaphid in our fauna, was originally described from 

 specimens found by Rev. Jerome Schmitt, near Beatty Station, 

 Pa., in colonies of Amblyopone serrata. In June, 1893, Mr. 

 Hubbard and myself found a considerable number of specimens 

 in the mountains of North Carolina, at Retreat and Round Knob. 

 They occurred in deep layers of vegetable mould, in company 

 with other blind species of Coleoptera (Anillus, Pinodytes). A 

 few specimens of Amblyopone serrata were found under the 

 same conditions, but the beetles were more numerous than the 

 ants. 



Batrisus ferox Lee. A single female specimen with ex 

 tremely small eyes was found by Mr. Theo. Pergande with Am 

 blyopone serrata near Washington, D. C. B. juvencus of my 

 former list has to be referred to B. ferox. 



? Myrmecochara n. sp. The species mentioned in my list 

 from Lake Tahoe, Cala., has been found by Mr. Wickham at 

 Canon City, Colo., with Solenopsis debilis (Psyche, 6, p. 321.). 

 It is incorrectly referred by him to the genus Gyrophaena. 



Lispinus. Some of the more convex species are so constantly 

 found with ants in old stumps or under bark that they are possibly 

 to be included in this list. Thus L. prolixus was found abun 

 dantly by Mr. Titus Ulke with Formica obscuripes in the Black 

 Hills, S. Dak. ; L. Icevicauda is equally common with Campono- 

 tus pennsylvanicus at Grand Ledge, Mich., and a third species 

 which is distributed in cabinets under the MS. name L. cara- 

 boides Fauv. was found in large numbers with Formica san- 

 guinea var. at Alta, Ut. 



Emphylus amerzcanusLec. A number of specimens occurred 

 with Formica sanguinea var. in a rotten log near Alta, Utah. 



Plister subopacus Lee. A single specimen was found under 

 a stone in a colony of Formica fusca, race subcenescens, at 

 Tenino, Wash., early in July. 



* I am informed by Mr. Pergande that this is not the typical F. san 

 guinea, which has not yet been found in North America, but one of the 

 sub-species or races which will shortly be described by Mr. C. Emery. 



