MARITIME COLEOPTERA. 501 
only a small round central hole. The form of this plate suggests 
that it may be employed as a kind of pin-hole camera. Mr. Ham- 
mond, who called my attention to this peculiarity, has drawn it in 
Fig. 114.” I have never been able to find this protecting cover to 
the eyes in any of the Plymouth examples, and recently (in 1916) I 
called the attention of my friend, Mr. R. J. Baker, to the subject. 
He dissected out the eyes of several specimens and very soon presented 
me with a pin-hole plate mounted in balsam ona slide. At the same 
time he called my attention to the fact that this plate was at the 
back of the eye and not in front, as the description in Miall would 
lead one to suppose ; and pointed out that the illustration of the 
eye in section in the work in question depicted the plate at the 
extreme back of the eye. If, therefore, Mr. Baker is right in assum- 
ing the drawing to be correct and the text not so, the supposed 
curiosity is nothing more than the ordinary optic foramen found 
probably in all beetles with organs of vision. 
*PERILEPTUS AREOLATUS Creutz. Two specimens, Stoke Bay, June 10th, 
1917, in shingle by a rill of fresh water. It was in quantity, but I 
did not recognize it. July 15th, very scarce at the rill, but I dis- 
covered it in numbers nearer the sea, where the shingle ended and 
the rocks commenced, by throwing the shingle into pools formed by 
the rill, and in which the seaweed Enteromorpha intestinalis (kindly 
named for me by Mr. T. V. Hodgson) was growing. This species is 
not usually considered a coast insect, but its occurrence under the 
conditions noted appears to warrant its inclusion in this list. Dr. 
Cameron, R.N., tells me that “‘ Perileptus is common in shingle 
stream banks in the Eastern Mediterranean right down to the 
coast.”” The beetle is rare in England. 
{TREcHUS FULVUS Dej. (Laprposus Daws). Three specimens on the 
beach at Rame Head, April, 1902; one, Bovisand, July, 1905. 
*T. sUBNOTATUS Dej. Introduced by Mr. Newbery as British on a single 
specimen taken by de la Garde, at Shaldon. The insect was shaken 
out of a tuft of grass evidently dislodged from the cliffs and lying 
on the beach. Ent. Mo. Mag., Vol. XLVI. (1910), p. 131. 
tPoconus cHALcEUS Marsh. Mouth of the Erme, September, 1906 ; 
Wivelscombe Creek, June, 1915; Budshead Creek, ‘Tamerton, 
June, 1916. Dawlish Warren, abundant, de la Garde. 
*HARPALUS TENEBROSUS Dej. This rare species was first discovered in 
the Plymouth district by Mr. J. J. Walker at Whitsand Bay in 
1875, who showed me the exact locality, where it may still be 
obtained in spring and autumn. Batten, one male, April, 1904. 
Slapton Ley, Wollaston, 1852. 
