TSOPODS OF NORTH AMERICA. TiOS 



square, extending the greater part of their length beyond the terminal 

 segment. The external branch is inserted at the inner post-lateral 

 angle of the basal joint and extends downward. The internal branch 

 extends much beyond the last abdominal segment, is longer than the 

 basal joint of the uropoda, and reaches the tip of the external })ranch. 



Color reddish-brown with markings of yellow. 



Four specimens were taken 1)3^ Dr. C W. Richmond at El Yunque, 

 Porto Rico, at an altitude of 2,800 feet. 



'ryjH.—C'Ai. No. 289U, U.S.N.M. 



SPHi^RONISCUS CACAHUAMILPENSIS (Bilimek). 



Armadillo caralmntitilpcimH Bilimek, Verh. zool.-bot. Ges. Wien, XVII, 1867, 

 pp. 907-^908.— Bi;dde-Liini), Crust. Isopoda Terrestria, 1885, j). 40. 



Locality. — Cave in Cacahuamilpa, Mexico. Found under stones. 



Budde-Lund suggests that this form certainly dili'(M-s from Ciihari^ 

 oecause the Hagellum of the second anteniue is composed of three arti- 

 cles, according to Bilimek. He suggests that perhaps it is nearer to 

 ]\<^K<]arniadi/lo. Inasmuch as the species of IWmhirnindiJlo recently 

 described, and which undoubtedly belong to that genus, have but two 

 articles to the flagellum of the second antenna', Hilimek's species nuist 

 be referred to the genus Sphnn'oit'isois^ wliich is the only genus of 

 AnnadiUididai having the tlagellum composed of three joints. 



Body grayish brown, slightly rugose transversely, head transversely 

 dilated, with the anterior margin raised; first thoracic segment very 

 wide, with a lateral lobe similar to a tooth; last segment of the abdo- 

 men strongly constricttnl in the middle; uropoda narrow, twice as long 

 as wide. 



Grayish })rown and covered with delicate little transverse ruga?. 

 II(Mul very broad, three times as broad as it is long, anterior border 

 turned up broadly, but diminishing in l)r(^adth on the sides under the 

 ev<'s and especially l)ehind. Antenna 5-jointed, with a -^-jointed Hagel- 

 lum; eyes composed of 14 ocelli. First thoracic segment strongly 

 arched, broadest in the middle, and edged l)y a delicate bordei" a tooth- 

 like lobe is formed on the sid(\s anteriorly, in front of which there is 

 found a concave depression; on the back there is a fiat transverse depres- 

 sion. Second segment about one-third narrower: the anterior portion 

 isdepn^ssed transversely by the ()V(>rlying anterior segment ; tluM'pim- 

 eron, which l>ecomes nai'rower on th(» sides, is rounded and turned 

 straight downward. SegnuMits 8 to 7 similar, with the exce])tion that the 

 epimera on the side appears to l)e mon^ bluntly cut off. Fii'st aixlominal 

 segment quite narrow; it do(\s not i-each to the outer edge; second- 

 fourth continue to decrease in breadth and have a horseslioe-shii])ed 

 appearance; the tifth is bordered with two lateral lobes and is as long 

 as it is l)road at the base; it is strongly constricted in the middle^ and 

 somewhat eidarged toward tlu^ outer border. The legs arc o-jointcd. 



