THE CANADIAN ENTOMOLOGIST. 91 



■obcordate, constricted behind, deeply channelled, disk gibbous on each side 

 of the channel, centre of each gibbosity smooth, remainder of the prothorax 

 punctured ; posterior lateral impression longitudinal : elytra black with a 

 shade of green, sculptured as in the preceding species, but the interstices of 

 the furrows are more visibly punctured : legs testaceous, thighs darker. 



[23] 23. Chl.enius emarginatus, S>ij/. — Length of the body 62 lines. 

 Taken in the journey from New York to Cumberland-house. 



Body hairy, punctured ; black underneath. Head glossy green, with a 

 tint of copper between the eyes, and a net-work of very minute, confluent, 

 transverse wrinkles; maxillae and palpi rufous, maxillary palpi very long ; 

 upper-lip transverse, rufo-piceous, anteriorly subemarginate ; mandibles pice- 

 ous; antennae rufjus, longer than the prothoiax, with the third joint rather 

 longer than the 4th ; prothorax dusky-green, transverse, rather narrowest at 

 the apex, very thick and minutely punctured; basilar impressions double, 

 the inner one the longest: elytra black with a very faint tint of blue : legs 

 rufous. 



This is most probably the C. emnrgiaatus of Say, but it does not exactly 

 accord with De Jean's species. [Say's C. emarginatus belongs to the genus 

 Anomoglossus, Chaud. ; the species here described is C. impwic/ifrons, Say.] 



24. Platynus angusticollis, DeJean. — Length of the body 5 lines. 

 Taken in lat. 54° and 65°. Not uncommon in Britain. 



[24] Body very black, glossy, somewhat narrowed. Head smooth, nar- 

 rower than the prothorax, including the neck sub-rhombcidal, without it 

 triangular; palpi and antennas piceous ; frontal impressions large; prothorax 

 narrower than the elytra, obcordate, longer than wide; dorsal channel deep 

 terminating anteriorly in a transverse obtuse angular impression; lateral mar- 

 gin dilated, especially at the base, reflexed, somewhat piceous in a strong 

 light, basilar impressions single, large, round, with a few scattered indistinct 

 punctures : elytra rather deeply furrowed; furrows very slightly punctured: 

 between the second and third are two punctiform impressions, the anterior 

 one being adjacent to the former furrow, and the posterior to the latter. 



[This is considered an erroneous determination by Dr. Le Conte (List, 

 p. 7) ; and is inserted by him as a race of P. sinuat us, Dej.] 



25. Agonum (Anchomenus) extensicolle, Sag — [Ent. Works, ii. 478.] 

 A pair taken in lat. 54°. [Belongs to Platynus ; has been taken in Ontario.] 



26 Agonum picipenne, Kirby. — Length of the body 3£ to 4 lines. Seve- 

 ral specimens taken in lat. 54°. 



[25] Body black, glossy. Mouth and its organs rufous, except the upper- 

 lip, which is edged with that colour ; antennae longer than the prothorax, 

 piceous with the scape paler than the other joits : prothorax longer than in. 



