1973 ] 
Shear — Rhiscosomididae 
201 
from Sitka spruce duff on bluff overlooking ocean, by E. M. Bene- 
dict. 
Description: Male holotype; length, 7.0 mm, width, 1.10 mm. 
Body form typical, as described for R. mineri. 
Anterior gonopods (Fig. 15) robust, with anterior coxal processes 
bent anteriad at right angle, lateral branch strong, irregular in form. 
Posterior coxal processes with anterior branch bent posteriad at 
right angle, blade-like, mesal branch large, upright, posterior branch 
relatively large, with extensive fimbriate anterior edge. Telopodites 
as usual. Posterior gonopods (Fig. 16) as usual for genus. 
Female paratype typical. Postgenital structures not distinguishable 
from those of R. bene diet ae. 
Distribution: OREGON: Curry Co ., 14 mi east of Gold Beach, 
elev. 600', berlese of rotted wood and fir duff, 10 March 1972, 
E. M. Benedict, $ S 99 . 
Notes: Just as R. josephi and R. mineri females are difficult to 
separate, so are those of R. malcolmi and R. benedictae. At the 
locality near Gold Beach, R. malcolmi is nearly syntopic with R. 
josephi , which was taken there from tan oak duff. A mile away, 
R. malcolmi was collected from rotted wood and fir duff. 
Rhiscosomides acovescor Shear 
Fig. 17 
Rhiscosomides acovescor Shear, 1972, Bull. Mus. Comp. Zool. 144(4): 262- 
263, figs. 451-458, $. 
Types: Male holotype from Sequoia duff, S. P. Taylor State Park, 
Marin Co., California, collected 7 January 1962 by C. W. O’Brien, 
deposited in Museum of Comparative Zoology, examined. 
Description: Male paratype; length, 6.0 mm, width, 1.10 mm 
(specimen broken). Body form as described for R. mineri, except as 
follows: 5 ocelli; sixth segment not at all enlarged, collum pig- 
mented as other segments, not cream-white. 
Anterior gonopods : anterior coxal processes of each side completely 
fused distally, separated by slight suture proximally, forming broad 
anterior plate, simple, not branched (Fig. 17). Posterior oxal pro- 
cesses with anterior branch small, weak, mesal branch thick, heavy, 
posterior branch thin, laciniate. Telopodites relatively large. Pos- 
terior gonopods (ninth legs) typical for genus. 
Females unknown. 
Distribution: Known only from the type locality. 
Notes: The female paratype I designated in 1972 was not dis- 
