124 
Psyche 
[Vol. 93 
Promesocoxal foveae present, metasternal foveae separated by over 
two foveal diameters. Tergite lengths subequal, I-II with faint short 
basal carinae. 
Males with protrochanters angulate on posterior margin, pro- 
tibiae with small preapical spur; mesotrochanters posteriorly angu- 
late, apical spur on inner margin of mesotibiae; sternites II-III with 
small setate tubercle near postero-lateral margins, VI simple, VII 
oval and setae over surface. 
Females lacking spurs of tibiae and trochanters, lacking tubercles 
of sternites II-III. 
Specimens examined, 8. HOLOTYPE male, New Hampshire, 
Coos Co., Jefferson Notch, 910 m, VII-14/ 3 1-1982, A. Newton & 
M. Thayer, window trap. PARA TYPES: New Hampshire: Carroll 
Co.: 2 males, 2 mi NW Wonalancet, VI-8/ 14-1984, VI-15/20-1984, 
D. S. Chandler, window trap; 1 male, The Bowl, 2.5 mi NW 
Wonalancet, VIII-1 6-1 984, sift rotten wood; 1 female, same data 
except XI-23-1984, R. M. Reeves, sift birch stump; 1 male, same 
data except, VII-23- 1985, D. S. Chandler, sift rotten beech logs. 
Canada: British Columbia: 1 male, Princeton, South Wash Creek, 
VII-22-1983, Lindgren funnel trap (DZEC); 1 male, Monashee 
Mountain near Cherryville, 1400-1600 m, VIII-12-1982, R. Bara- 
nowski (RBC), sifting litter and moss in spruce forest. 
Biology: Collected in rotten beech and birch logs in uncut forests 
in New Hampshire. 
Discussion: This species is very similar to Actizona chuskae 
Chandler from Arizona (Chandler 1985) in appearance and male 
characters. The genitalic form of borealis is identical in the British 
Columbia and New Hampshire specimens, and differs from that of 
chuskae in the form of the apex and internal spines of the aedeagus. 
These genitalic differences and the pubescent vertexal foveae of 
borealis readily separate the two species. 
Summary 
Two undescribed species of Pselaphidae, Euplectus silvicolus n. 
sp. and Actizona borealis n. sp., were discovered during a faunal 
comparison of the forest floor Coleoptera of cut and uncut forests m 
New Hampshire. 
