MADEIRAN COLEOPTERA. 19 
the examination of additional specimens) has induced me to consider 
it as distinct. There can be no doubt that it approaches the 7’. fla- 
vomarginatus very closely, nevertheless the many small characters 
which it possesses are so constant that I cannot but regard its 
claims for separation as sufficiently well expressed. Thus it is, upon 
the whole, a little larger, brighter, and more flattened than that 
species ; its prothorax is a trifle more narrowed behind, and with its 
posterior angles more acuminated; its elytra are a little broader, 
and more rounded at the sides, and with their striz (the lateral ones 
of which are obsolete) very much fainter; and its antenne are just 
perceptibly longer and more robust. It appears to be rare, the only 
districts in which I have found it being the upper extremity of the 
Boa Ventura, and the Cruzinhas,—both ofa high elevation. 
53. Trechus flavomarginatus. 
Trechus flavomarginatus +, Woll., Ins. Mad. 65. tab. ii. f. 2 (1854). 
Inhabits the mountains of Madeira proper, abounding everywhere 
within the sylvan districts,—from about 2000 to 5000 feet above 
the sea. 
54, Trechus signatus, n. sp. 
T. subovatus nitidus nigro-piceus, prothorace subquadrato basi levi- 
ter angustato angulis ipsis posticis acuminatis, elytris sat profunde 
striatis, striis exterioribus minus impressis, capite toto, protho- 
racis lateribus necnon elytrorum limbo testaceis, antennis subro- 
bustis infuscatis, pedibus pallidis. 
Long. corp. lin. 1}-12. 
T. just perceptibly smaller than, and not quite so broad as, the 
T’. levis,—the elytra being somewhat less rounded at the sides ; 
also not quite so highly polished. Head and prothorax, except a 
broad dorsal patch (or stripe) extending the entire length of the 
latter, dull-testaceous. Hlytra with the same character of colour- 
ing as in that insect, except that the dark central portion is not 
so dark,—being somewhat browner, and of a more wnequal hue (at 
any rate when immature): also more deeply striated than in that 
species, the dorsal strive being strongly impressed, though the 
outer ones are fainter. 
The present very singularly coloured Trechus was detected by my- 
self at S. Antonio da Serra in June of 1855, beneath fallen leaves at 
the head of the Santa Cruz ravine. It would seem however to be 
rare, since I only obtained six specimens during a fortnight’s sojourn 

+ The var. 3 of the Insecta Maderensia must be cancelled, it having been 
erected into the preceding species,—the 7’. levis. 

CZ 
