Packard.] [June 16, 
oped than in Zygonopus and Scoterpes, but a number of specimens are 
needed for dissection before the structure can be clearly made out. The 
number of segments is 28in 7. lunatum ; 80in T. culiotdes, and 81 in 7. 
glomeratum. The genus appears to be distributed from the Atlantic to 
the eastern slope of the Cascade mountains in Oregon, as well as on the 
Pacific coast of Oregon. ‘ 
The following are the known species of the genus which have been de- 
scribed by Mr. Harger : 
Trichopetalum lunatum Harger, Amer. Jour. Se. and Arts, iv, 118, Aug., 
1872.* Ihave found in April several specimens 
hybernating under leaves at Providence, R. I. 
Trichopetalum glomeratum Harg., 1. ¢., 118, 1872. Valley of the John Day 
river, Oregon, 
Trichopetalum tuliotdes Harg., 1. c., 118, 1872. Simmon’s harbor, North 
shore of Lake Superior. 
Genus ScormRrPES Cope. 
Spirostrephon (Pseudotremia) Pack., Amer. Naturalist, v, 748, Dec., 1871, 
Scoterpes Cope, Amer. Naturalist, vi, p. 409, 414, July, 1872. 
Body very long and slender, not fusiform ; consisting of thirty seg- 
ments besides the head, and with about fifty-two pairs of legs, with the 
penultimate joint very long. Head rather large, and unusually broad ; 
no eyes present; the genw unusually large, extending high up on the 
vertex, but not so globose as in Trichopetalum; the front is also car- 
ried farther up on the vertex than usual, and is much broader than long ; 
the clypeus flat, slightly bilobed on the front edge. The antenne are 
moderately long and hairy, with the sixth segment scarcely longer than 
in Trichopetalum, but more uniform in thickness, scarcely longer than 
thick ; the terminal joint as long as the sixth, the end conical, more pro- 
duced than in Trichopetalum or Zygonopus ; at the tip are four rather long 
sense-sete. Body segments becoming as usual smaller next to the head ; 
the anterior of each division of the arthromere much swollen high up on 
the sides; each shoulder with three tubercles, which are arranged in a 
scalene triangle and bearing much longer sete than in the other genera, 
though not quite so long as the body is thick. The legs are long and 
slender, much more sv than in Trichopetalum, and somewhat more so 
than in Zygonopus. In the male the eighth pair of legs are rudimentary, 
being two-jointed, the second joint only one-fourth longer than the basal, 
and ending in a well-developed stout claw. The genital armature minute 
and very rudimentary, pale, scarcely chitinous; the outer lamina short 
and thick, with a stout external recurved spine, and two terminal obtuse 
points ; the inner lamina shorter, forming a truncated angular spine, and 
not much more than half as long as the outer lamina; between the inner 
and outer lamina, its base next to the inner lamina is a middle spine end- 
ing in an irregular tuft of fine spinules. 
* Author’s extras, published July 18, 1872, New Haven, Conn, 
+" 
ee ees en 
