76 NORTHERN ZOOLOGY. 



(Ill) 2. * Dytiscus Harrisii. Harris's Dytiscus. 



D. [Harrisii) niger, prothoracis limbo, elytris latere et fascia obliqua Integra apicis, lute is ; brachiis,fcmoribusque badiis ; metas- 



terni lobis apice rotundatis. 

 Harris's Dytiscus, black; limb of the prothorax, side and oblique entire apical bund of the elytra, reddish-yellow; arms 



and thighs, pale chestnut ; lobes of the metasternum rounded at the apex. 



Length of the body 1 inch and 8 lines. 



One specimen taken in the Journey from New York to Cumberland-house. 



DESCRIPTION. 



Body black, underneath banded and clouded with pale chestnut. Head smooth ; nose, upper- 

 lip, and palpi, reddish-yellow ; the latter with the last joint dusky ; between the eves is an obscure, 

 roundish, red spot : prothorax smooth except an anterior transverse series of punctures which does 

 not reach the sides; as in the preceding species' it is surrounded by a broad reddish-yellow margin: 

 sculpture of the elytra like that of D. Ooligbukii, &c. but not so grossly punctured at the apex ; 

 side reddish-yellow, the yellow stripe terminating in a fork or two branches, the upper one not consist- 

 ing of dots as in D. marginalis, &c. but entire and toothed : a reddish-yellow arch marks the dilated 

 posterior coxse, and the base of the abdomen is of the same colour; arms and thighs, pale chestnut, 

 tibia; and tarsi of the four posterior legs black : the lobes of the metasternum are remarkably 

 obtuse. 



I have named this insect after a very eminent American Entomologist, Dr. T. W. Harris, who 

 well merits such distinction. 



vi. * Subgenus Leioxotus. 

 Elytra foeminea haud sulcata. 



Several species of Dytiscus being already known, distinguished from the typical 

 group by the females having elytra without furrows, and as smooth as those of the 

 male, as, for instance, D. conformis, circumcinctus,h,c. h it is evident that they form 

 a distinct group, and of that kind now denominated a subgenus. 



■ 5 See Gyll. Ins. Suec. iv, 370, 1, 371, 2. 



