252 CONXECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



1905. Armadillidiiim viilgare, Richardson, Bull. U. S. Nat. 

 Mus., No. 54, p. 666. 



1905. AnnadilUdnini vidgare, Paulmier, Bull. N. Y. State 

 Mus., No. 91, p. 184. 



Body oblong-ovate with lateral margins subparallel, rather 

 convex and able to be rolled up into a ball ; twice as long as wide ; 

 abdomen one-fifth the length of the body. Head much wider 

 than long, transversely truncated in front with lateral lobes small 

 and rounded. Eyes small, round, compound, and situated 

 laterally. 



First antennas rudimentary and inconspicuous. Second pair 

 one-fourth as long as body; second joint four times as long as 

 first; third joint one-half as long as second and shorter than 

 the fourth joint which is one-half as long as the fifth; flagellum 

 as long as- fifth joint, composed of two joints of which the first 

 is the shorter. 



Thoracic segments subequal, coxal plates not distinct, those of 

 the first segment with posterior angle acute. Last pair of legs 

 with ischium large but not, in accordance with Sars's description, 

 as long as the succeeding joints. 



Abdomen semicircular, as wide as thorax ; first two segments 

 covered at the sides by the seventh thoracic segment. Last seg- 

 ment much shorter than wide at the base, slightly tapering distally, 

 tip transversely truncated. Uropods not longer than terminal 

 segment of abdomen ; outer ramus much shorter than peduncle, 

 which is not visible from above, and very broad ; inner ramus 

 narrow and elongate, not extending beyond extremity of abdomen. 



Color, sometimes uniformly dark grey or nearly black, some- 

 times variegated with lighter patches. 



Length 16 mm. 



Distribution: world wide; Algeria; Azores; Bermuda; 

 Louisiana; Texas; Mississippi; Kentucky; Washington, Dis- 

 trict of Columbia; South Carolina; New York; Long Island; 

 Ohio; Massachusetts; Rhode Island; New Haven, Connecticut. 



This species is found under stones ; in cellars ; under boards 

 in damp soil ; in hothouses. It is injurious to some plants grown 

 in greenhouses as well as to young cotton and mushrooms in 

 Louisiana and Texas. 



