1-90 THE CANADIAN ENTOMOLOGIST. 



vitta (usually broken), as well as a small spot under the 

 humerus, yellow. Antennas annulate in both sexes. .48-.60 



in suhhamata, Rand. 



Blackish, region of the mouth often yellowish. Legs and elytra 

 testaceous or yellowish, the latter with sutural discal and lateral 

 marginal vittpe black. .32-.5 2 in lineoia, Say. 



10. Elytra margined and usually rounded at tip 11. 



Elytra not or scarcely margined at tip. Blackish, pubescence white, 



head, legs and first antennal joint sometimes reddish or partly 

 so. .24-.30 in . siibargentata, Kirby. 



11. Black, elytra blue, polished coarsely and sparsely punctured, antennae 



and legs either black or yellow. .24 in chalybea, Hald. 



Black or piceous, head and prothorax often reddish, legs and antennae 

 frequently in part yellow 12. 



1 2. Elytra shining, very coarsely punctured, tip subtruncate. Colour 



black, legs black, head and prothorax reddish. .26-. 36 



in capitata, Newm. 



Elytra more finely punctured, pubescence fine, white, prothorax and 

 head rarely {never ? ) at once red or yellow, though often sepa- 

 rately so 13. 



13. Antennae piceous; anterior femora and base of middle ones yellow- 



ish. Upper surface piceous or (in the var. hcematites^ Newm.) the 

 prothorax may be reddish. Terminal ventral segment of female 



simple. . 1 6-. 24 in nana, Newm. 



Antennae piceous, basal joint yellow. Anterior femora and the bases 

 of middle and hind ones yellow. Terminal segment of female with 

 a slight tuberosity near apical margin. Colour piceous or blackish, 

 thorax usually with yellow margin. .2 2-. 28 in exigua, Newm. 



14. Black, antennae brownish, legs and tips of abdominal segments 



ferruginous, pubescence golden, so dense as to conceal most of the 

 surface colour except on the legs, antennae, tips of abdominal 

 segments, middle of prothorax, five elytral bands and the sutural 

 margin. .40-52 in . .nitens, Forst. 



Black, antennae and tibiae often reddish, pubescence cinereous, 

 not concealing the colour. Elytra yellowish, base, tip and 

 two intermediate (usually interrupted) bands black. -31 --3?^ 

 in sexmactilata, Linn. 



15. Black, elytra sometifnes rufous or testaceous, prothorax very densely 



coarsely punctured, elytral punctuation less dense. AntenncC not 



