i86 Records of the Indian Museum, [Voi,. VI, 



P. ornatus, Uljanin, a synonym of that author's Heniilepistus 

 fedtschenkoi (see Isop. terr., pp. 113, 158, 305). Certamly the 

 colourmg of Uljanm's ornatus is very distmct from that described 

 by Milne- Bdwards for his like-named species, but the ornamenta- 

 tion of the peraeon is in both confined to the first two segments, 

 not extending to three as in the description or even four as indicated 

 in the figure of the species fedtschenkoi. This consideration does 

 not seem to be affected by the circumstance that in this genus the 

 full development of the dentate crests is only gradually attained 

 in the animal's progress to maturity. 



In 1885 Budde-IyUnd made Hemilepistus the third of seven 

 subgenera under Porcellio, that genus standing first in the Onis- 

 coidea, which was the second section of the family Onisci. In his 

 Revision, 1904, the family Oniscidae contains eight subfamilies, 

 of which the Oniscinae is the seventh, divided into three tribes, 

 with the Oniscoidea standing second and comprising Armadilli-^ 

 dium, Porcellio and Oniscus. To Porcellio are assigned Hemilepis- 

 tus and eight other names, apparently as subgenera, two being 

 indicated as doubtful, and Porcellio itself not being named as a 

 subgenus, but presumably to be taken for granted. Here the 

 term Oniscoidea has suffered a great loss of rank, and must not 

 be confounded with the terms Oniscoidea, Oniscoida and Onisci- 

 dea which have been used as group-names, to include all the 

 terrestrial isopods. 



Hemilepistus klugii (Brandt). 

 (Plate xii, B.) 



1833. Porcellio klugii^ Brandt, Conspectus Crust. Oniscodorum, p. 



17. 

 1879. Hemilepistus klugii, Budde-Lund, Prospectus Isop. terres- 



trium, p. 4. 

 1885. ,, ,, ,, Isopoda terrestria, p. 152. 



1908. ,, ,, ,, Yoeltzkow' s Reise in st- 



afrika, vol. ii, p. 281. 



The description given under the last reference agrees so well 

 with the figures now, I believe, for the first time given of this 

 species that the identification may be accepted with some confi- 

 dence. H. crenulatus (Pallas) would have priority, could its agree- 

 ment with Brandt's species be satisfactorily shown. 



A very striking effect is produced by the prominent pale blunt 

 or rounded teeth forming transverse crests on the front part of the 

 animal, contrasted with the dark grey, smooth or only microscopi- 

 cally setulose remainder of the body. The nearly related H. 

 reaumurii (Audouin) is described as occupying deep perpendicular 

 burrows in stony and clayey parts of the Sahara desert. Dollfus 

 was told by M. Eugene Simon that the species named dwelt at the 

 upper part of the hole, using its head as a sort of stopper to the 

 entrance. Noticing the resemblance of the burrows to those of 



