Atlantic Coleoptera. 227 
Hab.—Maderenses {Mad., Pto Sto.), et Canarienses 
(Lanz., Fuert., Can., Ten., Gom.) ; im aquis et aquosis, 
hine inde vulgaris. 
Although presenting many slight differences, both in 
colour and strength of punctation, according to the 
locality in which it is found, this appears to be the uni- 
versal Philhydrus in the Madeiran and Canarian archi- 
pelagos ; and I doubt not that it will be detected eventu- 
ally in every one of the islands where there is sufficient 
water for its existence during the drier seasons. It 
swarms in the brackish streams of Porto Santo, mm the 
Madeiran Group; and it has also been captured by Senhor 
Moniz in the Salinas at Paul do Mar, in the west of 
Madeira proper. At the Canaries, I have myself met 
with it in Lanzarote, Fuerteventura, Grand Canary, 
Teneriffe, and Gomera,—ain the first two and last of which 
it was found likewise by Mr. Gray, and in the last by the 
Messrs. Crotch. 
Fam. CORYLOPHIDA. 
p- 91 (genus Sactum). 
(Sp. 262) Saciwm pusillum. 
A late revision by Kraatz (Berl. Ent. Zeitsch. xiii. 283) 
of the European members of this genus, and of Arthro- 
lips, has elicited the remark that, in his opinion, the 
Madeiran Saciwm which I have hitherto referred to the 
S. pusillum, Gyll., of northern Europe, is in reality dis- 
tinct; and he has, consequently, proposed for it the 
specific title of madere. It is to Mr. Rye that I am in- 
debted for drawing my attention to Kraatz’s exact obser- 
vations on the subject; and it would appear that Gyllen- 
hal’s true pusillum (which has a less extended range than 
what is usually supposed, all the examples which had 
come under Kraatz’s notice being from Finland) is larger 
and more finely punctured than the Madeiran species, as 
well as darker in colour, and with the hinder margin of 
its prothorax conspicuously bordered with brown. He 
thea compares the Madeiran insect with the obscurum, 
Sahlb. (=pusillum, Redt., nec Gyll.)—a species found in 
central Europe—and adds that, while in the obsewrum 
the third tarsal joint is only slightly shorter than the 
