American Caraboidea 233 



biimpressed, with a medial cariniform elevation; antennae with the 

 first four joints black, the remaining joints pale brown, more obscure 

 at their tips; prothorax large, barely visibly longer than wide, 

 widest before the middle, with broadly, evenly rounded subparallel 

 sides, becoming parallel near the blunt basal angles; surface coarsely, 

 closely, subrugosely punctate; elytra slightly inflated behind the 

 middle, fully three-fourths longer than wide, not quite twice as 

 wide as the prothorax; surface with complex sculpture, the fine 

 smooth ridges nine in number, the intervals strongly micro-reticulate, 

 and. along the middle of each, fhere are two finer close-set carinae, 

 separated by a deep groove, which is feebly punctured along the 

 bottom, the space between each of the fine axial ridges and the 

 coarser ridges has very fine and shallow punctures, resembling 

 completely the fine interstitial punctures oi janus, bicolor and other 

 more northern species; sterna more coarsely punctured than the 

 abdomen; anterior male tarsi dark ferruginous, strongly asym- 

 metric, the basal joint not as long as the next two. Length (cf) 

 19.0 mm.; width 6.8 mm. Cuba (Havana), — Baker. [G. instilaris 



Cast., and erythrodera Brul.] *ruficollis Dej. 



Body much smaller and more slender, deep black and more shining, the 

 legs black, the elytra alutaceous and differing in outline from those 

 of any of the preceding, being elongate-oval and wholly without 

 humeri; head slightly longer than wide, only a little narrower than 

 the prothorax, coarsely but not densely punctate, more sparsely 

 at base; eyes very prominent, at one-half more than their own 

 length from the base, the tempora not very rapidly converging and 

 circularly rounded; rufous spot wanting; medial cariniform line 

 separating the two impressions continuing to the line posteriorly 

 tangent to the eyes; antennae slender, the first four joints black, 

 the remainder piceous; prothorax narrow and very elongate, widest 

 before the middle, the parallel sides broadly, evenly arcuate, very 

 gradually and feebly oblique posteriorly, becoming parallel at base, 

 which is transverse and four-fifths the maximum width; surface 

 subdeplanate laterally, the foveae long, moderately concave; median 

 line broadly, feebly impressed, with a fine axial stria; punctures 

 coarse and rather irregularly close-set; elytra gradually narrowing 

 from the middle to the base, four-fifths longer than wide, twice as 

 wide as the prothorax; sculpture nearly as in ruficollis, except that 

 the two fine axial costules of each interval are finer and feebler, and 

 not separated by a deep groove, and that the space between each 

 of these costular threads and the principal costae, which are very 

 moderate, is very sparsel}' and obsoletely punctulate; under surface 

 shining; anterior male tarsi black, very asymmetric, the external 

 lobes very oblique. Length (cf ) 1 5.0-16.5 mm.; width 4.6-5.2 mm. 

 Isthmus of Panama (Nat6) *panainensis n. sp. 



The species just described under the name panamensis , is evi- 

 dently related to miistelina Bates, from Costa Rica, but is very 

 much smaller, mustelina being 18 mm. in length, and the form of 



