502 J. H. KEYS. 
*H. tarpus Panz. Mothecombe, September, 1905, three females. 
Dawlish, de la Garde. 
*H. ATTENUATUS Steph. One specimen, Whitsands, June, 1902, but 
abundant in the following August. One only Millbrook Creek, 
July, 1902. Dawlish Warren, April, 1907, one only, de la Garde. 
}+DICHIROTRICHUS OBSOLETUS De}. Three near Cargreen in rejectamenta 
on the shore, October, 1912. 
+D. puBEscENS Payk. Near mouth of the Erme, September, 1906, in 
abundance. Cargreen, October, 1912, one only. Wivelscombe 
Creek, June, 1915, several. Dawlish, de la Garde. 
*AMARA OVATA F. Whitsand Bay, not rare. Downderry, E. A. Newbery. 
Woodbury Common, scarce, Parfitt. 
Ab. ADAMANTINA Kol. Tregantle, one specimen, August, 1902. 
Apparently the only British record of this brilliant variety. 
*A. LucIDA Duft. Whitsand Bay. Frequent. 
*CALATHUS MOLLIS Marsh. ‘Torcross, August, 1895. Dawlish, de la 
Garde. 
+LIONYCHUS QUADRILLUM Duft. The first record of this rare species for 
Devonshire was made by Mr. T. V. Wollaston, who discovered it at 
Slapton Ley. In The Zoologist, 1851-2, p. 3619, he says: “Its 
habits are very remarkable .. . it selects the driest and most 
barren shingle at a distance from the beach, so loose and bare that 
even weeds are unable to exist upon it—where the insect may be 
seen darting from beneath in the clear sunshine, and as suddenly 
disappearing. . . . It is difficult to speculate on what a voracious 
insect like the present can feed in such a position; for the smaller 
animals in a pebble ridge, so dry and shifting as to refuse nourish- 
ment to even a blade of grass, and having more the appearance in 
fact of a recently opened gravel-pit than anything else, cannot be 
very numerous.” I have several times searched for the insect in 
the shingles on the marine side of the Ley in vain ; but I have taken 
it on two or three occasions in the shingle, close up to the rocks on 
the shore from Torcross to the Beesands, in the months of August 
and May. The examples were almost entirely the aberrant forms, 
none was a well-marked typical quadrallum. 
In May, 1915, I discovered Lionychus at Downderry, Cornwall, 
darting about amongst the shingle at the foot of the sloping slaty 
rocks at high-tide mark. Seven typical forms, six with the posterior 
pair of spots very small, one with the latter just discernible, and two 
aberrations were taken. Remembering Wollaston’s remarks, I 
watched the behaviour of the insects very carefully. They not only 
