83 
Note on the Isopod Known as Geoligia Perkinsi Dollfus 
(Crust.). 
BY CHAS. CHILTON, 
Professor of Biology, Canterbury College, New Zealand. 
(Presented at the meeting of October 6, 1921.) 
Pt 
In the Fauna Hawaiiensis, Vol. 2, p. 525, Monsieur A. Doll- 
fus described, under the name of Geoligia perkinsi, a terres- 
trial Isopod which had been collected at several localities in 
the islands of Hawaii and Kauai at heights varying from two 
to four thousand feet above sea level. The genus Geoligia, to 
which he referred the species, had been established by him in 
the year 1893* for a species found at a height of 1200 metres 
in the forests at Cumbre de Valencia, Venezuela. He defined 
the new genus as follows: 
“Coxopodites (épiméres des auteurs) non distincts. Le 
reste comme dans le genre Ligia. Espéces terrestres.” 
The new species from Hawaii, which is described in some 
detail, gave Dollfus an opportunity to revise the characters of 
the genus, and he points out that the line of separation between 
the epimera and the segments exists on the segments posterior 
to the first, but is scarcely distinct. ‘To the generic characters, 
however, he adds that the branches of the uropods are articu- 
lated. Consequently, he redefined the genus as follows: 
“Coxopodites (épiméres) non ou trés-peu' distincts. Appen- 
dices des uropodes articulés. Le reste, et notamment les par- 
ties buccales, comme dans le genre Ligia. Espéces terrestres.” 
The species Geoligia perkinsi is described at some length, 
and it is stated that the pleo-telson has the posterior margin 
provided with five blunt teeth similar to that of Ligia erotica 
Roux. 
Some years ago some terrestrial Isopoda were sent to me 
from Honolulu and Puuloa in the Hawaiian Islands by the late 
G. W. Kirkaldy as Geoligia perkinsi. On examination, how- 
ever, they proved definitely to be examples of Ligia erotica 
Proc. Haw. Ent. Soc., V, No. 1, October, 1922. 
* Voyage de M. E. Simon an Venezuela; Isopodes terrestres, Ann. Soe. 
Entomol. de France, vol. LXIT, p. 343. 
