52 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



Head. — Setae on dorsal aspect long, stout, and prominent; di- 

 ameter of ocellus 2 gi-eater 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 3 setae; antenna with the proximal 

 segment slightly shorter than the second, the third two-thirds and the 

 distal slightly less than one-half the length of the second, the 

 proximal segment with 5 or 6 setae and the second with 9 

 or 10; maxilla with the proximal segment of the galea bearing 3 

 setae on its mesal margin, maxillary palpus three-segmented ; ligula 

 with 4 fine setae arranged in a transverse row at its ventro-distal 

 end, proximal segment of labial palpus with 3 spinelike projections 

 on the ventro-distal margin and with 2 setae on each side of these 

 spines, the proximal segment with 4 setae and the distal segment 

 with 1. 



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

 as far cephalad as the mesal portion, lateral margins carinate, pri- 

 mary setae not large or distinct, secondary setae small, inconspicuous 

 and not over 15 in number (fig, 158). 



Ahdomen. — Chitinized areas distinct; secondary setae short, small 

 and not numerous (fig. 169) ; ninth abdominal sternum with the cau- 

 dal margin bearing two groups of four setae each ; median hooks with 

 two setae; inner hooks with two setae, the spinelike projection one- 

 half or more the length of the hook (fig. 179). 



Measuremetits. — Length of larvae, 23 to 27 mm., width at the third 

 abdominal segment, 3 to 4 mm.; diameter of ocellus 2, 0.37 to 0.39 

 mm.; distance between ocelli 1 and 2, 0.30 to 0.32 mm.; length of 

 fronto-clypeo-labral area, 2.1 to 2.2 mm., width, 2.1 to 2.2 mm.; 

 length of pronotum, 2.7 to 2.8 mm., width, 4.3 to 4.5 mm. 



This species is very similar to Cicindela pulchra and differs from 

 it principally in the slightly larger size as is shown by the head 

 measurements, the cephalo-lateral angles not extending as far 

 cephalad as the mesal portion, a slightly different arrangement of 

 the setae on the third abdominal segment and the form of the mesal 

 hooks. 



Larvae were not reared and the determination given is not final. 

 It is possible that the species here described may be Cicindela pul- 

 chra and the one described as pulchra may be ohsoleta. 



The larvae were collected at HasAvell, Colorado, on the 'prairie in 

 adobe or slightly gravelly soil. The burrows were located in the bare 

 spaces between tufts of grass, they were from 5 to 7 inches deep, 

 slightly spiral, with the bottom often enlarged to about three-eighths 

 of an inch in diameter. 



Of 34 larvae collected on August 25, 1916, 4 were parasitized 

 with 7 parasites. Two had one parasite each, another larva had 



