(i88 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



ing- spines; last joint very small, narrow cylindric. Antenna? rather 

 slender, though not nearly attaining half the length of the body. 

 Flagelluni somewhat shorter than the peduncle, and composed of about 

 eleven articulations, the last tipped with a dense bunch of delicate hair- 

 like ])ristles. Legs armed with scattered slender spines; propodal joint 

 very nari'ow and elongated; dactylus simple. Inner plate of first pair 

 of pleopoda in male slightly produced at the tip and provided with four 

 apical bristles. Uropoda scarcel}^ exceeding half the length of the 

 metasome; inner projection of the basal part occupying al)Out half its 

 length; outer ramus gradualh' tapering distally and carrying on the 

 tip three short l)ristles; inner ramus very narrow, linear, not extend- 

 ing to the tip of the outer; apical bristles nearly as long as the ramus. 

 Color of dorsal face light fuscous, variegated with irregular dark 

 patches, which, on each side at the base of the lateral plates of meso- 

 some, form a nearly continuous longitudinal band. Length of adult 

 female, !) mm." — G. O. Sars.'^' 



LIGIDIUM TENUE Budde-Lund. 



IJgidium teiiue Budde-Luxd, Crust. Lsop. Terrestria, 1885, p. 258. — Richardson, 

 Proc. U. S. Nat. Mus., XXI, 1899, p. 867; Ann. Mag. Nat. Hist. (7), IV, 

 1899, p. 335; American Naturalist, X.XXIV, 1900, p. 306. 



Local! ty. — Sitka Island. 



Body elongate, narrow, posteriorly attenuated, somewhat convex, 

 smooth. 



Second pair of antenna? lost in the specimen. 



Transverse line of the epistome raised, straight, or very slightly 

 sinuated in the middle. 



« Crust, of Norway, II, 1899, p. 158. The description which follows is that of 

 G. Budde-Lund: 



Oblonge ovatuni, jjost atteuuatum, leviter convexum, la^ve, nitidum. 



AntenuH' exteriores graciles, dimidium corpus longitudine pequantes; fiagellum 

 10-13 articulatum. 



Oculi sat magni. 



Caput ante rotundatum, linea frontalis marginalis nulla; epistoma linea trans- 

 versa elevata, medio acute sinuata; vertex sulco postico supramarginali duobusque 

 sulcis post oculos arcuatis pra'ditus. 



Trunci annuli duo priores margine posteriore curvato, duo sequentes subtransversi, 

 tres posteriores post magis medio sinuati. Epimera parva, angulis posticis annulo- 

 rum duorum priorum rotundate obtusis, annulorum duorum sequentium subrectis, 

 trium posteriorum acutis. 



Pedes graciles; unguiculi appendice gemina, flaliellata. 



Cauda trunco abrupte angustior. Annulus analis late rotundate triangulus. Pro- 

 cessus internusarticuli basalispeilum analium ramo terminal! exteriore triples l)revior. 

 Ramus terminalis interior gracilis, apicem rami exterioris subattingens, tilis duobus 

 terminalibus tenerrimis, ramum exteriorem longitudine a;quantil)us. 



Color e fusco brunneus, albido vel flavo marmoratus, in lateribus pallidioril)us 

 serie longitudinali macularum nigrofuscarum; vivus pruinosus. 



Longitudo 7-10 mm. , latitudo 3-4 mm. , altitudo, 1.6-1.8 mm.— Budue-Lund, Crust. 

 I sop. Terrestria, 1885, pp. 254-256. 



