86 DESCRIPTION OF INSECTS 



the middle, lateral edge slightly excurved near the pos- 

 terior angles, basal edge slightly oblique each side. 



Elytra dark bronzed, strise obtuse, somewhat canaliculate, 

 obsolete behind, punctures transverse, interstitial lines 

 convex. 



Feet rufous. 



At once distinguishable from the preceding species by its 



smaller size. 



7. B, *oppositum black ; elytra fuscous, each with two large 

 remote whitish spots. 



Length one-eighth of an inch. 



Tachys A-guttatus. Melsh. Catal. 



Head black ; antennae brown ; base and palpi testaceous. 



Thorax black, somewhat pedunculated, wider before the 

 middle, much contracted behind, posterior angles salient, 

 acute, basal edge oblique each side, and, excluding the 

 angles, hardly wider than the peduncle. 



Elytra fuscous or blackisii, each with a large, whitish, lon- 

 gitudinally suboval spot attaining the humerus and exte- 

 rior margin, distant from the suture, and one less than 

 half as large, rounded, placed on the disk behind the 

 middle, strise obsolete, wanting behind, punctures of the 

 strise distinct. 



Feet testaceous. 



Subject to considerable varieties in size and in depth of 



colouring of the elytra. The term 4<-guttatus of Mr. Mel- 



sheimcr is preoccupied. 



8. B. *ajinis black ; elytra each with two large, distant, ob- 

 solete, pale spots, and a smaller one on the humerus be- 

 fore. 



Length one-eighth of an inch. 



Thorax black, wider before the middle, much contracted 

 behind, posterior angle salient, acute, basal edge oblique 



