ISOPODS OF NOKTH AMERICA. 



689 



Inner process of the basal article of the uropoda one-fourth as long 

 as the outer branch. Inner branch long, extending much beyond the 

 apex of the outer branch, being a sixth part longer than that branch, 

 the two terminal filaments short, equal to half the length of the outer 

 branch. 



Color dark, without spots. Length 9 mm. Width 3 mm. a 



LIGIDIUM LONGICAUDATUM Stoller. 



Ligidium lungicaudatum STOLLER, 54th report New York State Museum, 1902, 

 pp. 208-211. 



Locality. Schenectady, New York. 



Body oblong-ovate, about twice as long as wide, 3 mm.: 6 mm. 

 Uropoda. 2 mm. Length of body with uropoda, 8 mm. long. 



Head twice as wide as long, 1 mm.: 2 mm., with the anterior mar- 

 gin widely rounded. Eyes round, com- 

 posite, and situated close to the lateral 

 margins. The first pair of antennae are 

 small and almost inconspicuous. They 

 are composed of three articles two 

 subequal ones and a minute terminal 

 one. They extend to the end of the sec- 

 ond article of the peduncle of the sec- 

 ond pair of antenna 1 . The second pair 

 of antennae have the first two articles 

 short and subequal; the third is but 

 little longer than the second; the fourth 

 and fifth are equal in length and each is 

 about twice as- long as the third. The 

 flagellum is composed of eleven articles, 

 the terminal article ending in a bunch 

 of hairs. When retracted, the second 

 antennae extend to the posterior mar- 

 gin of the third thoracic segment. 



The first four segments of the thorax 

 are subequal and each is a little longer 

 than any of the last three, which are sub 

 equal. The epimera are not distinctly separated on any of the segments. 



The first segment of the abdomen has the lateral parts concealed by 



The above description is adapted from the following one of Budde-Lund's: 



Elongatum, angustum, post attenuatum, leviter convexum, lyeve, nitidum. 



Antenna} exteriores . 



Epistomatis linea transversa, elevata, subrecta vel medio levissime sinuata. 



Processus internus articuli basalis pedum analium ramo terminali exteriore quad- 

 rnplo brevior. Ramus terminalis interior longus, apicem raini exterioris multum 

 superani-s illo sexta parte longior, fills dnobus terminalibus brevibus, dimidiam 

 partetn ranii exterioris ;equantibus. 



Color fuscus, immaculatus. Longitude 9 mm., latitudo 8 mm. BrnDE-Luxn, 

 Crust. Isop. Terrestria, 1885, p. 258. 

 2858905 44 



FIG. 731. LIGIDIUM LONGICAUDATUM 

 (AFTER STOLLER). x 5^. 



