46 INSECTA MADERENSIA. 



with two very deep longitudinal impressions between the eyes. Prothorax large, subquadrate, 

 slightly rounded and narrowed behind, broadly margined, the margin (especially towards the 

 posterior angles) being much recun^ed j convex in front ; with a longitudinal channel down the 

 disk, and a deep, wide, punctured, rounded fovea on either side at the base. Elytra nearly 

 parallel, rounded posteriorly, deeply striated, the strise being scarcely perceptibly punctate ; and 

 with three large and distinctly impressed points, or fovese, down the disk of each, of which the 

 anterior one is near to the third stria, and the two hinder ones to the second, from the suture. 

 Legs long and robust. 



The present insect is closely allied to the common O. aterrinms of northern and 

 central Europe, of which it is not impossible that it may be in reality but a geo- 

 graphical variety. Still, it is usually retained as a species, and as such therefore it 

 must stand. It differs from the O. aterrinms in being larger and less sliining, lq 

 having its prothorax less quackate (the sides and hinder angles being a little more 

 rounded), by its elytra being more deeply striated, Init ^^•ith the striae less evi- 

 dently punctate, and by the three fovese down the disk of each being much smaller. 

 It has been foimd in Spain, on the Pyrenees, and in. Tangier ; but in Madeira it is 

 extremely rare. I have myself taken, hitherto, but a single specimen, — from be- 

 neath a stone in a boggy piece of ground in the Rev. R. T. Lowe's garden at the 

 Levada. I possess however one more example, lately communicated by ^M. Rousset 

 from the Ribeiro de Joao Gomez, near Fimchal ; and I have seen a third, in the 

 collection of the Rev. R. T. Lowe, which was captured many years ago by the late 

 Dr. Heinecken. 



33. Omaseus Wollastoni. (Tab. I. fig. 9.) 



O. elongatus ater nitidissimus depressus, prothorace subeordato basi utrinque bifoveolato, elj-tris apice 



aeuminatis profunde punctato-striatis singulo punctis nullis impresso, pedibus brevioribus 



gracilioribus. 

 Long. Corp. lin. 6a. 



Pterostichus WoUastoni, Hcer, i)i litt. 



Habitat sub lapidibus Maderje australis, in collibus declivibusque niaritimis, rarior : species valde 

 distincta, et a Entomologo pcritissimo Os''° Heer, Turici, super promontorium Cabo Gerajao 

 dictum d. 25 Feb. a.d 1851 primo inventa, unde etiam nuperrime communicavit Dom. Rousset. 



O. elongate, narrower than the last species, deep black, exceedingly shining, and depressed. Head 

 small, short and narrow, much constricted behind the eyes, which are very prominent ; punctured, 

 though sparingly so upon the disk, and with two short and very obscure longitudinal impressions 

 between the eyes. Prothorax small, subcordatc, much narrowed behind, and rounded at the 

 sides, with the extreme hinder angles produced into a minute tooth, narrowly margined, the 

 margin not being recurved ; depressed, punctured behind ; with a longitudinal channel dowTi the 

 disk, and two distinct, narrow, rugosely-punctured fovese on either side at the base. Elytra 

 nearly parallel, acuminated behind, deeply striated, the stria: being distinctly punctate ; and 

 without any indications of impressed ])oints, or fovese, on their respective disks. Legs slenderer 

 and shorter than those of the last species : the setae at the extreme apex of the tibue (especially 

 of the four hinder ones) golden-yellow. 



