282 



Synonymy ;.- 



Actoniscus ellipticus Harger (1878, p. 373; 1880, p. 309, pi. 



1, %• 3). 

 Armadilloniscus ellipticus Budde-Lund (1885, p. 239). 

 Actoniscus ellipticus Richardson (1902, p. 303; 1905, p. 634). 



Previously both Actoniscus and Armadilloniscus have been 

 referred to the Oniscidae, the latter being assigned to a special 

 subfamily Armadilloniscinae by Verhoeff (1918, p. 161). Recent- 

 ly (1929, p. 12) I suggested, on the basis of the mouthparts 

 figured for Actoniscus lindahli (Richardson, 1905, p. 635, fig. 680), 

 that Actoniscus should be referred to the Scyphacidae. This 

 has since been confirmed by an actual examination of the mouth- 

 parts of A . ellipticus (Fig. 3-7) . 



Through the kindness of Dr. K. W. Verhoeff I received some 

 specimens of Armadilloniscus dalmatinus, one of which I dis- 

 sected, and have been able to assure myself that Actoniscus 

 Harger 1878 is a synonym of Armadilloniscus Uljanin 1874. 

 (See Verhoeff, 1918, PI. 2, fig. 41-43, 50, and here Fig. 11). 



Description. — The figures given of Armadilloniscus ellipticus. 

 (Fig. 1-10) will obviate a detailed description of the appendages. 

 The pigment present is gray brown. The frontal and antennary 

 lobes are plain colored, while the occipital region has white spots. 

 The second to fifth segments of the antennal peduncle are colored 

 dorsally, there is a basal white spot on the fourth segment and a 

 distal white spot on the fifth. The epimera and a broad median 

 band on the pereion are plain colored. The rest of each perional 

 tergum is heavily spotted with white. The pleon is plain colored 

 as well as the peduncles of the uropods except for a submedian 

 white" spot on each side of each segment and an ill-defined median 

 white spot on the telson. 



The tubercles shown on the dorsum (Fig. 1) are- not mentioned 

 by Harger but, in fact, he almost never mentioned the sculpture 

 of land isopods. They occur on all other species of Armadillon- 

 iscus. In addition the terga, legs, uropods, and antennae are 

 well covered with scales. 



