COLEOPTERA-CARABIDAE OF THE JUAN FERNANDEZ ISLANDS 



63i 



specimens), 4 to 9 all converging behind on a spot a little in front of the 

 apical emargination, 9 leaving the marginal channel at some distance behind 

 shoulder, a short scutellary striole present between i and 2; intervals moderately 

 convex, inner ones approximately equal, outer ones, becoming very narrow as 

 they approach the point on which the striae converge, 9 rather narrow through- 

 out, 3 with three pores (not always present) at about a fifth, two thirds, and 

 five sixths respectively, a tenth interval present, both wide and flat, between 

 the apparent origin of interval 9 and the apical emargination; surface impunctate, 

 except for a short row of small punctures visible in two of the specimens near 

 the base of interval 6, a depression on each side behind shoulders and another 

 deeper one on each side of disk in front of the apical declivity; epipleura wide, 

 slightly narrower at middle, ending rather abruptly just before the apical 

 emargination. Microsculpture isodiametric, fairly conspicuous on the elytra, 

 the meshes much smaller and fainter on the sides of head and prothorax, 

 wanting on the disks of both. Underside impunctate, prosternal process fine, 

 bordered at apex, the declivity rounded, metepisterna quite a half longer than 

 wide, ventral segments not sulcate, apical segment with one seta on each side 

 in the cT, 2 in the $, a little removed from margin. Femora all dilated; 

 metatrochanters half as long as the femora; tibiae all dilated at apex, mesotibiae 

 cT curving gently inwards, metatibiae <^ curving first inwards and then outwards; 

 first metatarsal joint with a slight outer sulcus, joint 5 setulose beneath. The 

 very peculiar form of the elytra, with its dilated sides, surface depressions, 

 wide tenth interval, and lobate declivous apex, should render the species easily 

 recognizable. 



Masatierra (J. J. Walker), 4 ex. (cT^), found at from 100 to 500 feet. 

 The type is in the British Museum. 



Pterostichus selkirki sp. n. — Fig, 4. 



Length: 11,5 mm. Width: 4,2 mm. 



Black: palpi and joints i to 3 of antennae dark ferruginous. 



Body apterous. Head convex, clypeus 

 slightly emarginate, the suture very fine, frontal 

 foveae shallow, surface with a few vague striae, 

 eyes moderately prominent, antennae barely 

 reaching base of prothorax, ligula bisetose, 

 truncate at apex, tooth of mentum deeply 

 notched. Prothorax convex, quadrate, nearly 

 a half wider than head, a third wider than 

 long, widest at middle, base a little wider 

 than apex, sides bisetose, narrowly bordered, 

 evenly rounded from base to apex, hind angles 

 slightly obtuse but little rounded; median 

 line very fine, transverse impressions obsolete, 

 inner basal foveae rather long though only 

 faintly impressed, outer ones obsolete, surface 

 with only a few vague transverse striae, middle 



of both base and apex longitudinally striate. 



Fig- 4- 



Pterostichus selkirki Andrewes. 

 X4- 



