SIR JOHN LUBBOCK ON THYSANURA. . 979 
I have myself found Lipura maritima abundant among the rocks, and on pools, at 
low water, near St. Andrews; and Dr. Allman has kindly sent me specimens from 
Kinsale. 
BECKIA, n. g. 
Body scaly. Antenne 4-jointed. Eyes wanting. Thorax not projecting overhead. Abdominal segments 
unequal. + 
This is a particularly interesting genus, and forms a link between Lepidocyrtus and 
Degeeria. In many respects it resembles Degeeria, but differs in the absence of eyes and 
the presence of scales. It is even more closely allied to Lepidocyrtus, from which the 
principal difference consists in the absence of eyes. Templetonia differs from Beckia in 
having the terminal segment of the antennæ ringed, and in the presence of a dark eye- 
patch, with a single lens. 1 have dedicated the genus to Mr. Beck. 
BECKIA ARGENTEA, n. Sp. 
Silvery, with bright metallic reflections. No eyes. Third segment of the antennz rather 
= shorter than the second or fourth. A thick fringe of hairs in front of the thorax. 
Filaments of the tail scarcely reaching to the ventral tube. 
Length +); of an inch. 
I have also a second species of Beckia, somewhat broader than B. argentea. This.is, 
perhaps, the C. albinos of Nicolet. Considering the absence of eyes, the activity of these 
species is truly remarkable. They make, however, great use of their antennz in feeling 
the ground before them. 
| SEIRA, n. g. 
Body scaly. Antenne 4-jointed; terminal segment not ringed. Eyes on a dark patch. Thorax not 
projectiug over the head. Abdominal segments unequal. 
I have proposed this genus for the scaled species which were placed by Nicolet among 
the Degeeriæ, because it seems to me manifestly unnatural to unite in the same genus 
species with and without scales. Like the preceding genus, Seira* forms a very inter- 
esting link between several genera—a fact which I have endeavoured to indicate in the 
name. Indeed some of the species approach very closely to Lepidocyrtus ; and as 
regards S. Buskii, I was long in doubt whether to regard it as a Seira or a Lepidocyrtus. 
The form of the thorax, which is the characteristic on which that genus was founded, 
admits of every gradation, and therefore is not of very easy application. 
SEIRA DOMESTICA. 
Degeeria domestica Nicolet. 
Nicolet's description of this species is as follows :— 
* Mémes antennes que le précédent, mais blanches, ainsi que le dessous du corps, les 
pattes et la queue. Dessus du corps écailleux, d'un blanc sale trés-luisant, avec 
* From cepa, a chain. 
VOL. XXVII. : 2P 
