668 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



Head much wider than long, H mm.: 4 mm., with the front strain-lit. 

 Kpistome projects hut little beyond the frontal margin The eyes are 

 small, round, composite, and situated in the antero-lateral angles of 

 the head. The first pair of antenna* are rudimentary and inconspicu- 

 ous and are composed of three articles. The second pair of antenna> 

 have the first article short; the second is about four times as long- as 

 the first; the third is about half as long as the second; the fourth is 

 one and a half times longer than the third; the fifth is twice as long 

 as the fourth. The flagellum is composed of two nearly equal articles. 

 The second antenna* extend to the posterior margin of the first thoracic 

 segment. The maxillipeds have a palp of three articles. The palp of 

 the mandibles is wanting. 



The segments of the thorax are subequal, each being 2 mm. in 

 length. There are no epimera separated off on any of the segments. 



The abdomen is as wide as the thorax. The first two segments are 

 covered at the sides by the seventh thoracic segment. The sixth or 

 terminal segment is 2 mm. wide at the baseband 1 mm. long. It 

 tapers to a truncate extremity, which is 1 mm. wide. The uropoda 

 are not longer than the terminal segment of the body. The peduncle 

 is not visible in a dorsal view. The outer branch is broad and fills in 

 the space between the sixth abdominal segment and the lateral part of 

 th^ fifth segment; it is truncate at its posterior extremity. The inner 

 branch is narrow and elongate, but does not ex- 

 tend beyond the extremity of the abdomen. 

 All the legs are ambulatory. 



ARMADILLIDIUM QUADRIFRONS Stoller. 



Armadillidium quadrifrons STOLLER, 54th Report of the 

 New York State Museum, 1902, pp. 211-212. 



Locality. Schenectady, New York. Found in 

 greenhouses. 



Body ovate, contractile into a ball; nearly twice 

 as long- as wide, 5 mm. : 9 mm. 



Head nearly three times as wide as long, with 

 a small, median V-shaped notch. The epistome 

 is triangular in shape; the broad, basal part being 

 anterior and projecting in front of the head, giv- 

 FIG. 707. ARMADILLIDH-M ing the head the appearance of having a broad, 



QUADRIFRONS (AFTER j j- i -, rr\\ 11 



STOLLER) x 5j quadrate median lobe. The eyes are small, com- 



posite, and situated in the antero-lateral angles. 



A groove separates the antero-lateral margin of the head from the 

 antennal lobe, which is large and conspicuous and well rounded. In 

 this groove the antenna? lie. The first pair of antenna? are small 

 and inconspicuous. The second pair have the first article short; the 

 second is twice as long as the first; the third is a little shorter than 



