ClCINDELID^; AND CARABID^ 49 



coloration and the smaller size, it differs from ovipennis in its more 

 basally narrowed prothorax, shorter, more convex and more deeply 

 striate elytra and longer antennae. 



Group gregaria Fisch. 



The outline in this group is peculiar and very different from any 

 other in the very elongate, more or less depressed elytra, the sides 

 of which gradually converge with very feeble arcuation from near 

 apical third or fourth to the humeri, which round broadly to the 

 base; so far as identifiable by the writer, the group will comprise, 

 besides gregaria, trifaria and purpurata of LeConte, the following 

 three species: 



Nebria catenata n. sp. Black, with more or less piceous tinge, the 

 elytra sometimes blackish-brown, probably from immaturity; legs and 

 under surface black when mature, the antennae piceo-testaceous, the 

 four basal joints black; upper surface shining, rather depressed and 

 without trace of metallic coloration at any part; head smooth, much 

 narrower than the prothorax, the two anterior impressions broad and 

 feeble, the usual two rufous spots evident; antennae slender, three-fifths 

 as long as the body; prothorax fully one-half wider than long, the sides 

 rather strongly rounded anteriorly, thence strongly converging and 

 broadly sinuate to the basal angles, which are right and sharp, the sides 

 feebly punctulate, broadly but very feebly reflexed, except the marginal 

 bead which is elevated as usual, the transverse impressions moderate, 

 finely, sparsely punctate, the lateral basal impressions, at some distance 

 from the angles, elongate and deep; base three-fourths the maximum 

 width, transverse to the broad truncate and feeble lateral posterior 

 projections; median line well impressed; elytra (cf ) twice as long as wide 

 and a third wider than the prothorax, or ( 9 ) a little shorter and relatively 

 broader, widest at posterior fourth, the striae rather fine, moderately 

 impressed and evidently punctured, the intervals broadly, feebly convex, 

 the third, fifth and seventh each with about four or five foveae, which 

 completely interrupt the intervals and, by the rounding in of the striae 

 at these points, produce a catenated appearance; legs long and slender. 

 Length 12.5-13.5 mm.; width 4. 7-5. 2 mm. Colorado Levette collection. 



Evidently allied to trifaria Lee., but in that species the head is 

 said to be scarcely narrower than the prothorax, the side margins 

 of the latter strongly reflexed and the elytral striae impunctate. 

 The series at hand numbers seven examples, which exhibit but little 

 variability, except as to the number of interstitial foveae; in one 

 example there is only one fovea on the fifth interval, though the 

 others have their normal number. 

 T. L. Casey, Mem. Col. IV, Oct. 1913. 



