191 



acute. Last segment of metasome triangular, almost as long as it is broad at 

 the base, and gradually tapering distally, tip obtusely pointed. Antennae short, 

 scarcely exceeding X U of the length of the body, last joint of the flagellum more 

 than twice as long as the 1st. Last pair of legs with the ischial joint not at- 

 taining the length of the succeeding part of the leg. Copulative appendages of 

 1st pair of pleopoda in male greatly produced, with the extremities very slender 

 and abruptly curved outwards; opercular plate of 2nd pair likewise produced in 

 the form of a hook. Uropoda with the outer ramus about the length of the basal 

 part, and quadrate in form. Colour of dorsal face dark reddish brown, or chest- 

 nut brown, with a double row of rather conspicuous angular yellow patches along 

 the middle of the mesosome, and another series of lighter patches on each side, 

 at the base of the side-plates; between this series and the dorsal patches in 

 each segment, there is a group of less distinct flexuous stripes. Length of adult 

 female 8 mm. 



Remarks. — This species, first described by Brandt, may be easily distin- 

 guished from either of the 2 preceding species by the different shape of the last 

 segment of the metasome, as also by its beautiful colouring. The A. Grubei of 

 Zaddach is, according to B.-Lund, identical with this species. 



Occurrence. —I have found this form in two localities near Christiania, 

 viz. on the Ladegaardso and at Lysaker. In the former place it occurred occa- 

 sionally in rather dry situations below stones; in the latter it was found exclu- 

 sively beneath loose bark. I have also received the species from Mr. Ellingsen, 

 who found it likewise under loose bark at Kragero. There are also some specimens 

 in our Univ. Museum from Langesund, having been collected many years ago 

 by the late Dr. Jensen; and B.-Lund records it also from Arendal. Finally, Dr. 

 Aug. Hansson states its occurrence at Fenisjo near Fredrikshald. 



It moves rather slowly, and at the slightest touch rolls its body up into 

 a perfect ball, which is easily lost to sight in the hollows of the ground. 



Distribution. — Sweden, Denmark, Germany, Belgium, France. 



4. Armadillidium pulehellum, Brandt. 



(PI. LXXXIII, fig. 4.) 

 Armadillidium pulehellum, Brandt, Consp. p. 26, fig. IS, 

 Syn : Armadillo maeulaius, Sill. 



,. Armadillidium. pictum, Plateau (not Brandt). 



Specific Characters. — Form of body about as in A. nictum. Cephalon with 

 the frontal edge distinctly prominent in the middle, lateral lobes evenly rounded. 



