ART. 17. LARVAE OF HOLARCTIC TIGER-BEETLES HAMILTON. 45 



setae; inner hooks with three setae, the spine-like projection incon- 

 spicuous or wanting (fig. 139). 



Measurements. — Length of larvae, 18 to 20 mm., width at the third 

 abdominal segment, 2 to 2.3 mm. ; diameter of ocellus 2, 0.29 to 0.31 

 mm.; distance between ocelli 1 and 2, 0.19 to 0.21 mm.; length of 

 fronto-clypeo-labral area, 1.65 to 1.75 mm.; width, 1.65 to 1.75 mm.; 

 length of pronotum, 1.9 to 2,1 mm., width, 2.3 to 2.5 mm. 



The larvae were collected at Southern Pines, North Carolina, by 

 Mr. A. H. Manee in hard soil at the side of a road. The burrows 

 were small and about 25 inches deep. The larvae were not reared 

 and the indentification is not positive. 



CICINDELA MARGINATA Fabricius. 



Figs. 73, 110, and 140. 

 Shelford, reared, larvae in the collection of the University of Illinois. 



Color. — Head and pronotum dark purplish bronze with a strong 

 blue reflection; setae on dorsal aspect of head and pronotum trans- 

 parent or glassy, the other setae brown. 



Head. — Setae on dorsal aspect long, slender, and inconspicuous; 

 diameter of ocellus 2 distinctly greater than the distance between 

 ocelli 1 and 2; fronto-clypeo-labral area as long as broad; U-shaped 

 ridge on caudal part of frons bearing two setae; antenna with the 

 proximal segment subequal in length to the second; the third two- 

 thirds and the distal slightly less than one-half the length of the 

 second, the proximal segment with nine or ten setae and the second 

 segment with nine or ten ; maxilla with the proximal segment of the 

 galea bearing three setae on its mesal margin, maxillary palpus 

 three-segmented; ligula w^ith four fine setae arranged in a trans- 

 verse row at its ventro-distal end; proximal segment of the labial 

 palpus with three spine-like projections on the ventro-distal end 

 and with two setae on each side of these spines, the proximal seg- 

 ment with four setae and the distal segment with one. 



Thorax. — Pronotum with the cephalo-lateral angles not extend- 

 ing as far cephalad as the mesal portion; lateral margins slightly 

 carinate, primary setae not large or conspicuous, secondary setae 

 small and not numerous (fig. 73). 



Abdomen. — Chitinized areas distinct, secondary setae short, fine, 

 and numerous (fig. 110) ; ninth abdominal sternum with the caudal 

 margin bearing two groups of three setae each ; median hooks with 

 three setae; inner hooks with nine or ten setae, the spine-like pro- 

 jection almost obsolete (fig. 140). 



Measurements. — Length of larvae, 19 to 22 mm., width at the 

 third abdominal segment, 2.2 to 2.4 mm. ; diameter of ocellus 2, 0.33 

 to 0.35 mm.; distance between ocelli 1 and 2, 0.28 to 0.30 mm.; 



