ART. 17. LAEVAE OF HOLARCTIC TIGER-BEETLES HAMILTON. 19 



Pronotum with the secondary setae not more than 10 in number and with- 

 out a row on each side of tlie meson, the blue reflection not strong. 



duodecimguttata, p. 39. 



21. Inner hook with the two setae located equidistant from the tip ; mesal 



hook with the three setae located in a row 22 



Inner hook with the outer setae located nearer the tip ; median hook with the 

 three setae not in a row, the distal one placed nearer the mesal side of 

 the hook germanica, p. 40. 



22. Head and pronotum bronze with a slight blue reflection ; diameter of ocel- 



lus 2 less than the distance between ocelli 1 and 2 punctulata, p. 41. 



Head and pronotum dark purple with a green or blue reflection ; diameter 

 of ocellus 2 subequal to or greater than the distance between ocelli 1 and 

 2 flavopunctata rectilatera, p. 42. 



23. Pronotum with the cephalo-lateral angles extending distinctly cephalad of 



the mesal portion unipunctata, p. 43. 



Pronotum with the cephalo-lateral angles not extending distinctly cephalad 

 of the mesal portion 24 



24. Inner hooks bearing three prominent setae, the spinelike projection almost 



obsolete abdominalis, p. 44. 



Inner hooks bearing 10 or 11 prominent setae, the spinelike projection 

 distinct marginata, p. 45. 



25. Proximal segment of the galea with four stout setae on the mesal margin ; 



head and pronotum light brown ; diameter of ocellus 2 distinctly less 



than the distance between ocelli 1 and 2 26 



Proximal segment of the galea with three stout setae on the mesal margin ; 

 head and pronotum not brown, metalic colored ; diameter of ocellus 2 

 subequal to or greater than the distance between ocelli 1 and 2 27 



26. Median hook bearing two distinct setae; average width of head and pro- 



notum 4.5 mm formosa, p. 46. 



Median hooks bearing three distinct setae ; average width of head and pro- 

 notum 4.0 mm formosa generosa, p. 47. 



27. Inner hooks bearing more than two setae scutellaris lecontei, p. 48. 



Inner hooks bearing two setae 28 



28. Pronotum with the secondary setae few, not over 15 to 20, fine and incon- 



spicuous 29 



Pronotum with the secondary setae numerous, 50 or more, short, flat, and 

 prominent 31 



29. Pronotum dark purple with a green or blue reflection, lateral mar- 



gins not lighter ; median hooks with two setae 30 



Pronotum bright bronze with a faint green or purple reflection, lateral mar- 

 gins light yellow ; median hooks with three or four setae. 



cuprascens macra, p. 49. 



30. Pronotum with the cephalo-lateral angles extending as far cephalad as the 



mesal part ; stetae on the third abdoouinal segment as in figure 113. 



pulchra, p. 51. 

 Pronotum with the cephalo-lateral angles not extending as far cephalad as 

 the mesal part ; setae on third abdominal segment as in figure 169. 



obsoleta, p. 51. 



31. Ninth abdominal sternum with the caudal margin bearing two groups of 



three setae each ; pronotum with the secondary setae numerous, dis- 

 tinctly more than 100 in number ; median hooks with • less than four 

 setae 32 



