AMEKICAN I'UILOSorUlCAL SOCIETY. 549 



posterior margins oa their middles obviously piceous ; dorsal 

 line well impressed, very distinct, not abbreviated ; anterior 

 transverse line obvious in all it^ length, arcjuated; basal lines 

 dilated, orbicular, obvious, with a few, small, sparse punctures 

 within or rather near the base; elytra with slender striie ; inter- 

 stitial spaces flat, third with a puncture between the middle and 

 tip ; marginal and sutural edges towards their tips piceous ; rudi- 

 mental stria none, but instead of it is a puncture ut base of tho 

 second stria; feet pale yellow. 



Length less thau three-twentieths nf an inch. 



[Unknown to me. — Leg.] 



5. A. OBSOLETUS. — Dark piceous; striae of the elytra obso- 

 lete. 



Inhabits Mexico. 



Body dark piceous, impunctured ; antennae, labrura and palpi 

 honey-yellow ; thorax with pale piceous anterior and basal mar- 

 gins ; lateral margin with eight or nine hairs ; dorsal line almost 

 obsolete; basal impressions dilated, oval ; elytra with the basal, 

 exterior and apical margins paler piceous ; strias obsolete, except- 

 ing the subsutural and lateral ones ; a series of large punctures 

 behind the middle of the exterior margin ; feet pale honey -yel- 

 low. 



Length one-fifth of an inch.* [436] 



BEMBIDIUM Latr. 



1. B. iNiEQUALE Say, Journ. Acad. Nat. Sc. Vol. 3, p. 1;")1. — 

 Very closely allied to ^xifudrisum, Panz., and may po.ssibly be 

 only a variety of that European species, nevertheless it is some- 

 what smaller, the thoracic impressed lines are more distinct, par- 

 ticularly the transverse basal one, and the striae of the elytra are 

 more dilated and the punctures mure obvious. As it is the 



* Count Dejean has done me the favor to send me the four volumes 

 of liis "Species des Coleopteres," which have now been published. 

 This work is indispensable to all those who study the Coleoptera. It 

 contains the descriptions of a great number of North American species, 

 and has greatly facilitated my examination of the insects described in 

 the preceding part of this paper. 

 1834.] 



