1986] 
Chandler — New Pselaphidae 
123 
Chandler, sift conifer logs. PARATYPES : 1 male, 1 female, same 
data except IX-1-1984; 1 male, same data except VIII-21-1985; 6 
males, 10 females, same data except VI-8/ 14-1984 (2), VI-15/20- 
1984 (1), VI-28/ VII-4-1984 (1), VIII-2/ 10-1984 (2), VIII-1 1/ 16-1984 
(1), V-23/ VI-4-1985 (1), VII-2/ 10-1985 (6), VII-24/ 30-1985 (1), 
VIII-22 / 28-1985 (1), flight intercept trap; 1 male, 1 mi N Wona- 
lancet, East Fork Spring Brook, 1900', VII-23-1985, D. S. Chandler, 
sift hemlock logs; 1 male, 1 female, same data except VII-2/ 10-1985, 
VII-31/ VIII-6-1985, flight intercept trap. Coos Co.: Norton Pool, 2 
mi E East Inlet Dam, IX-7-1984, D. S. Chandler, sift rotten 
spruce/ fir logs. Canada: Nova Scotia: 1 male. Cape Breton 
Highlands National Park, MacKenzie Mountain, PG648868, 
VII-4-1983, R. Vockeroth, pan traps (CNCI); 1 female, same data 
except Lone Shieling, PG729861, VI-25- 1983, Y. Bousquet, pans 
(CNCI). 
Biology: This uncommon species was only found in rotten conifer 
logs in an extensive litter survey at The Bowl. Most specimens were 
collected by flight intercept traps. 
Discussion: This species is quite distinct among the Nearctic spe- 
cies of Euplectus by the presence of basal carinae on tergite III, spur 
of the male metatrochanters, simple sternites IV-VI, and smooth 
vertexal area. Since two species of Euplectus have been introduced 
to North America from Europe, the major faunal works of Jeannel 
(1950) for France and Besuchet (1974) for Central Europe were 
checked to be certain this species had not been previously described. 
In Wagner’s (1975) recent revision of the Nearctic species of Euplec- 
tus, this species would be placed in the calif ornicus- group. Silvicolus 
may be separated at couplet 5 of Wagner’s key by the lack of any 
papilliform setae in the depression of sternite VI. This species differs 
from the generic diagnosis of Grigarick and Schuster (1980) in pos- 
sessing basal carinae on tergite III, which are lacking in all other 
Nearctic species and also in the twenty Palearctic species in my 
collection. 
Actizona borealis n. sp. 
(Fig. 4) 
Length 1.20-1.32. Head with pubescent vertexal foveae, penulti- 
mate antennomeres symmetrical, antennal club with parallel mar- 
gins, twice as long as wide. Elytra with three basal foveae. 
