CICINDELID.E AND CARABID/E 55 



Group virescens Horn. 



An isolated group in the genus, consisting hitherto of a single 

 species from Vancouver Island. I here venture to add another, 

 based upon rather radical disagreement with the published descrip- 

 tion of virescens: 



Nebria brevis n. sp. Form short and broad, evenly, moderately 

 convex, shining, black with faint dark greenish-blue lustre above, the 

 legs, antennae and under surface black; head small, smooth, nowhere 

 rugose, having a very feeble oblique sigmoid impression at each side 

 of the vertex; antennae (cf) filiform but shorter than usual, much less 

 than half as long as the body, piceous distally; prothorax transverse, 

 more than one-half wider than long, widest only just before the middle, 

 the sides almost evenly rounded from apex to the obtuse but sharply 

 defined basal angles, becoming perceptibly straighter before the latter; 

 surface broadly and strongly concave and reflexed at the sides, the 

 anterior impression narrow but distinct medially, the basal broad and 

 rather deeply concave, very finely subpunctulate, the lateral impressions 

 deep, large and anteriorly oblique; base truncate throughout the width, 

 three-fourths the maximum width; elytra short, oblong, not quite 

 one-half longer than wide, parallel, feebly and evenly arcuate at the sides, 

 rather abruptly broadly rounded at apex, the humeri distinct though 

 rounded; striae fine, very feeble, strongly though finely punctured 

 suturally, the outer ones subobsolete as well as scarcely punctured, the 

 third with two small and feeble setigerous punctures; intervals almost 

 flat; legs slender but rather short. Length 9.0-11.0 mm.; width 3.8- 

 4.25 mm. Oregon (Corvallis, Mayville and Philomath), Moznette. 

 Five examples. 



In virescens, according to G. H. Horn, the length is 12 mm., the 

 prothorax only about a third wider than long, with the sides 

 moderately broadly reflexed, and the head near the eyes is said to 

 be subtriangularly impressed and rugose, of which character there 

 is barely a vestige in brevis, but the oblique smooth sigmoid im- 

 pressions are very evident. If the original description is to be relied 

 upon, there can be no doubt that brevis is specifically different from 

 virescens. 



Group pallipes Say. 



In this peculiar group of the Atlantic regions there are three very 

 sharply differentiated species, almost invariably mingled together 

 in collections. If the elytra in either sex of pallipes be examined, 

 it will be found that each is obtusely rounded and very feebly, 

 arcuately and subtransversely subtruncate at tip; with this premise 

 the two following species may be identified very readily: 



