Clje (Skafe dnfomotept 



Yol. II. TOKONTO, MAY 16, 1870. No. 7. 



INSECTS OF THE NORTHERN PARTS OF BRITISH AMERICA. 



COMPILED BY THE EDITOR. 

 From Kirby's Fauna Boreali-Americana : Insecta. 

 {Continued from page 82.) 



[Kirby divides the genus Calosoma into two sub-genera : Calosoma proper 

 having the maxillary palpi with the last joint of the length of the last but 

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

 the last joint shorter than the last but one, and the elytra obscure with gilded 

 punctiform impressions. The two species that he describes both belong to 

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

 p. 52) has given a more complete classification of the species of this genus 

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

 Kirby's division has not been adopted by subsequent authors.] 



[19j 15. Calosoma calidum, Fab. This species is very common in all 

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



16. .Calosoma frigidum, Kirby. — Length of the body 9£ lines. Taken 

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



Not unlike G. 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 

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

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

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

 are less conspicuous ; there is a triple series of punctiform 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 [Nebria] castanipes, Kirby. — Length of body 5 

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



