. Bulletin - United States National Museum. Science. 422 BULLETIN o4, UNITED STATES NATIONAL MUSEUM. ASELLUS INTERMEDIUS Forbes. Asellus mtermed'ms Forbes, Bull. 111. Museum of Nat. Hist., No. 1, 1876, pp. 10-11.—Underwood, Bull. 111. State Lab. Nat. Hist., II, 1886, p. :-]58.— Richardson, American Naturalist, XXXIV, 1900, p. 297. Localities.—Found in hill countiy of southern Illinois, under stones in small streams. Bod}' oblong'-ovate, about three times as long as wide, 2 mm.: 7 mm. Head wider than long, 1 nun.: li mm., with the anterior margin straight. Sides of head entire, with a small lol
. Bulletin - United States National Museum. Science. 422 BULLETIN o4, UNITED STATES NATIONAL MUSEUM. ASELLUS INTERMEDIUS Forbes. Asellus mtermed'ms Forbes, Bull. 111. Museum of Nat. Hist., No. 1, 1876, pp. 10-11.—Underwood, Bull. 111. State Lab. Nat. Hist., II, 1886, p. :-]58.— Richardson, American Naturalist, XXXIV, 1900, p. 297. Localities.—Found in hill countiy of southern Illinois, under stones in small streams. Bod}' oblong'-ovate, about three times as long as wide, 2 mm.: 7 mm. Head wider than long, 1 nun.: li mm., with the anterior margin straight. Sides of head entire, with a small lol)e on either side near the base. Eyes small, composite, and situated close to the lateral mar- gins, halfwa}" between the anterior and the posterior margins. The first pair of antennae luive the basal article large and somewhat di- lated; the second article is half as wide as the tirst and about as long; the third article is a little more than half as long as the second. The tiagellum is composed of nine articles and ex- tends to the middle of the fifth article of the peduncle of the second pair of antenna. The second antennae hav^e the first three articles short and about equal in length; the fourth arti- cle is about as long as the tirst three taken together; the fifth is one and a half times longer than the fourth. The fiagellum is composed of about fifty articles and extends a short distance beyond the posterior margin of the seventh thoracic segment. The maxilliped has a palp of five articles. The palp of the mandibles is composed of three articles. The first segment of the thorax has the lateral margins entire, with the anterior angle not devel- oped and the epimeral lobe" large and conspicuous and placed an- tero-laterally. The second, third, and fourth segments have the lateral margins entire, with the antero-lateral angles well devel- oped, and the epimera small and almost inconspicuous and placed antero-laterally. The fifth segment has the anterior par
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