688 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



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

 sU-nder, 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 bristles. Legs armed with scattered slender spines; propodal joint 

 very narrow 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 scarcely exceeding half the length of the 

 metasome; inner projection of the basal part occupying about half its 

 length; outer rauius gradually tapering distall3 T and carrying on the 

 tip three short bristles; 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, 9 mm." G. O. SARS. 



LIGIDIUM TENUE Budde-Lund. 



Ligidium tenue BUDDE-LUND, Crust. Isop. Terrestria, 1885, p. 258. RICHARDSON, 

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

 1899, p. 335; American Naturalist, XXXIV, 1900, p. 306. 



Locality. Sitka Island. 



Body elongate, narrow, posteriorly attenuated, somewhat convex, 

 smooth. 



Second pair of antenme 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 ovatum, post attenuatum, leviter convexum, Iseve, nitidum. 



Antenna? exteriores graciles, dimidium corpus longitudine requantes; flagellum 

 10-13 articulatum. 



Oculi sat magni. 



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

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

 suit-is post oculos arcuatis pra'ditus. 



Trunci annul i duo priores margine posteriore curvato, duo sequentes subtraneversi, 

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

 rum duorum priorum rotundate obtusis, annulorum duorum sequentiuin subrectis, 

 trium posteriorum acutis. 



Pedes graciles; unguiculi appendice gemina, flabellata. 



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

 cessus internusarticuli basalis peduin analium ramo terminali exteriore triple brevior. 

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

 terminalibus tenerrimis, ramum exteriorem longitudine sequantibus. 



Color e fusco brunneus, albido vel flavo marmoratus, in lateribns pallidioribus 

 serie longitudinal! macularum nigrof uscarum ; vivus pruinosus. 



Longitude 7-10mm., latitude 3-4 mm. , altitudo, 1.6-1.8 mm. BUDDE-LCND, Crust. 

 Isop. Terreatria, 1885, pp. 254-256. 



