58 PLA Ty. CLIX. 
fcarcely exceeds one half of the length of O. Afellus in England, yetif 
we may form an opinion of the German f{pecimens from thofe 
figured by Sulzer, they are larger than with us. 
The Onifcus Agilis of Perfoon, figured in Panzer’s Work*, cor- 
refponds perteély with ours in fize; and the minute markings on 
the fhells, if carefully examined with a glafs, will be found nearly 
alike. The antennez of the figure in Sulzer feems rather contrary to 
the {pecific charaéter of the infeét; and that of Panzer’s, though of 
another {pecies, more refemble thofe of our fpecimen. 
° 
Of the Onifcus Afellus we find different coloured {pecimens, fome 
are almoit white with grey marks, others are nearly deep black; 
we find allo, Oni/cus Aguaticus liable to variations, though not fo 
much as the former infeét, in fome the light ground colour is very 
diftin&, in others rather confufed. Some are deeper coloured; and 
again, many, when firft taken, have a fine glowing, olive brown ap- 
pearance througlout, though lefs vivid than that of Onifcus Agilis 
before noticed. 
Fig. 1.2. Natural fize. Fig. 3. Magnified. Fig. 4. Antenne. 
® Faun, Inf. Germ. 
PLATE 
