72 



Nothrus 



(J. M. A., fase. 29 t. 22 (Nph.) j 18-1-0 K runcinatus, 0. L. Koch. 0. M. A., fasc. 29 t. 23 

 ?1871 N. borealis, Thorell in: Of v. Ak. Fork, £.28 p. 697 | ?1885 N. angulatus, Eerlese. 

 A. 51. S.. fasc. 17 nr. 5 || noil 1855 N. horridus, Nicolet in: Arch. Mus. Paris, v.7 p. 456 

 t. 7 f. 1 | non 1885 N. h., Berlese. A. M. S,, fasc. 17 nr. 1. 



lm. Brown, dull, rough, covered with short villous processes, usually 

 so concealed by dirt that neither color nor texture can be seen. 2 apophyses 

 on Host, bear thick villous hairs, Psstg. org. with very short peduncle and 

 globular head. Legs fringed with thick hairs on apophyses. Ung. trid., 

 almost homd. Abd. oblong, Dors, of Abd. flat or hollow, post, margin concave 

 with 2 apophyses near the angles bearing hairs; a flat projection at a 

 lower level bearing 2 hairs occupies the concavity. A sub-elliptical 

 raised ridge on Dors, of Abd. with 2 transverse ridges' within and 

 4 diagonal from angles. 6 small apophyses on outside of this ridge bear very 

 short hairs but do not project beyond lat. margin of Abd. — Nph. Yellowish- 

 white, covered with dirt. Somewhat like Im., but Dors, of Abd. and margins 

 of Abd. bear about 24 papillae, each with a thick curved hair. — Im. L. ca. 

 800 jlx. 



At the roots of rnoss etc. Algeria. England, Germany, Switzerland. 



11. N. irrvenustus Michael 1888 N %., Michael, Brit. Orib., v.2 p. 500 t. 47 A 



f. 12. 



Im. Very like N. horridus but post, margin of Abd. convex and 

 without central projection. Apophyses on Cephth. smaller than in N. horridus, 

 does not carry dirt. L. ca. 660 |u. 



On lichen. England. 



12. N". monodactyrus Michael 1888 N. m., Michael, Brit. Orib., v. 2 p. 529 

 t. 45 f. 10 — 13 | 1896 Angelia monodactyla, Berlese, A. M. S., Crypt. II p. 26. 



Im. Very like N. tardus but whitey- brown, slightly chitinized, not 

 reticulated. Legs 3 and 4 usually concealed beneath Abd. Ung. mond. 

 with a small square projection from tarsus on each side of Ung. A few 

 hairs round margin, none on Dors, of Abd. L. ca. 290 u. 



On moss and sphagnum. England. 



13. N. palustris C.L.Koch 1840 A 1 , p., C.L.Koch. C. M. A., fasc. 29 t. 13 j 

 1855 N.p., Nicolet in: Arch. Mus. Paris, v. 7 p. 457 t. 7 f. 6 | 1886 N. p., Berlese, A. M. S., 

 fasc. 30 nr. 4 j 1888 N.p., Michael, Brit. Orib., v. 2 p. 494 t.46 f.8— 13 | 1896 Angelia p., 

 Berlese, A. M.S., Crypt, II p. 26 j 1844 Nothrus pollens, C.L.Koch, CM. A., fasc. 38 t.4 

 (Nph.) ! ?1895 N.Upilis, Banks in: Tr. Amer. ent. Soc, v.22 p. 14. 



Im. Dark red-brown, rough, dull; central parts coarsely pitted, pits 

 about 85 to mm peripheral parts finely granular. 2 longitudinal rolls of 

 cuticle on Cephth. ending posteriorly in mamilliform elevations, which bear 

 the Psstg. Psstg. org. very long, filiform, directed outward, usually 

 doubly curved. Legs long for genus; leg 4 articulated to a tubular projection 

 of ventr. plate. Ung. very hetd. Abd. wider posteriorly than anteriorly, its 

 lat. margins broad, curved, and raised at an angle, terminating posteriorly 

 in large bosses, median part of Dors, of Abd. arched. Ant. and post, margin 

 of Abd. almost straight, each post, angle bears a very long hair 

 directed backward and concave inward, 2 pairs of shorter hairs on post, margin. 

 2 rows on Dors, of Abd. and some on lat. edges. — Nph. like Im., but Abd. 

 white and post, angles form conical projections. — Im. L. ca. 1,1 mm. 



In moss. England, France, Germany, Italy, Netherlands, Sweden and ?New 

 York State. 



