one, and the elytra gilded ; Chrysostigma having the maxillary palpi with 

 the last joint shorter than the last but one, and the elyt'-a obscure with gilded 

 punctiforai impressions. The two species that he describes both belon<: to 

 the latter sub-genus. Dr. Lo Conte (Pro. Acad. Nat Sci. Phil, Feb. 1862, 

 p. 52) has given a more complete classification oi' the species of this goujs 

 into six groups, based upon the differences of the anterior tarsi of the males. 

 Kirby's division has hot been adopted by subsequent authors] 



[19j 15. Calosoma calidum, B'ab. This species is very common Id all 

 parts of North America; several specimens were taken in the expedition. 



16. Calosoma FRifiiDUM, Kuby. — Length of the body 9| lines. Taken 

 in Drummond's Island, Canada, by Dr. Bigsby. 



Not unlike C. calidum, but longer in proportion and more depressed. 

 Body black, not glossy above. Head confluently punctured and wrinkled : 

 mandibles obliquely but less densely wrinkled, and frontal impressions longer 

 tuan in C. calidum: prothorax scarcely at all bronzed, lateral margin obscurely 

 green, with the same nuu.ber of elevated lines as in C. calidum, but in the 

 furrows formed by them is a series of punctures, and the transverse lines 

 are le.ss conspicuous ; there is a triple series of punetiform impressions, but 

 they are bilobed, smaller, and the gilding is greenish and less conspicuous; 

 they are also less numerous, there being only seven or eight in the series next 

 the suture, eight or nine in the intermediate one, and three only towards the 

 apex in the external one : at the base there is also a pair on each side : the 

 sides of the body underneath are greenish, punctured and wrinkled, 



[20] 17. Helobia [NebriaJ castampes, Kirby. — Length of body 5 

 lines. Two specimens were taken in lat. 65°. 



Body black, glossy. Antenna, mouth, mandibles, and palpi pale chesnut 

 or mahogany colour; the former more dilate at the apex ; front with three 

 or four slight furrows between the eyes ; upper-lip very short : prothorax 

 heart-shaped, constricted posteriorly, convex in the disk ; sides and base 

 depressed and lightly punctured : elytra dark piceous, striated or slightly 

 furrowed : furrows very obsoletely punctured; interstices very flat; between 

 the 2nd and Brd furrows, adjoining the latter, are from three to five shallow 

 but rather large impressions : the legs are slender, of a pale chesnut or 

 mahogany colour, in one of the specimens the thighs are darker than the rest 

 of the leg. N.B. — lu one specimen there are three and in the other five 

 impressions. 



18. Chl^nius sericeus, Forst. — [Say's Ent. Works, ii. 483.] — Several 

 taken in the journey from New York to Cumberland-house. In Canada by 

 Dr. Bigsby. [Very common throughout Canada.] 



