60 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



Measurements. — Length of larvae, 25 to 30 mm. ; width at the third 

 abdominal segment, 3 to 4 mm.; diameter of ocellus 2, 0.40 to 0.43 

 mm.; distance between ocelli 1 and 2, 0.37 to 0.40 mm.; length of 

 fronto-clypeo-labral area, 2.3 to 2.5 mm. ; width, 2 to 2.2 mm. ; length 

 of pronotum, 2.4 to 2.6 mm. ; width, 3.5 to 3.8 mm. 



Larvae have been collected from a variety of situations and they 

 are not as restricted in their habitat as most of the larvae of the 

 Cicindelidae. Dr. V. E. Shelford has dug the larvae at Yuma, 

 Arizona; Galveston and Houston, Texas; Mobile, Alabama; and 

 Columbus, Georgia. Those dug at Houston, Texas, were taken from 

 bare, artificially exposed soil of a fine moldable nature, not sticky. 

 At Galveston, Texas, the larvae were dug along the beach from moist 

 sand covered with a scattered growth of vegetation. Those collected 

 at Columbus, Georgia, were dug ivom. moist, clayey soil. A, H. 

 Manee collected the larvae at Southern Pines, North Carolina, from 

 hard, stony, and gravely soil, clayey soil, and moist, loose black soil. 

 The openings to the burrows are large, the burrows straight or 

 slightly inclined ivom. the vertical, and from 8 to 12 inches deep. 



TETRACHA VIRGINICA Linnaeus. 



Figs. 79 and 117. 



Manee, reared, larvae iu the collection of the University of Illinois, U. S. 

 National Museum and the author's collection. 



Color. — Head and pronotum very dark bronze with a green reflec- 

 tion, lateral and caudal margins of pronotum pearly white; setae 

 brown, some of those on the head and pronotum occasionally white. 



Head. — Setae on dorsal aspect long, slightly flattened and promi- 

 nent; diameter of ocellus 2 slightly less than the distance between 

 ocelli 1 and 2; fronto-clypeo-labral area longer than wide ; transverse 

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

 proximal segment slightly longer than the second, the third one-half 

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

 proximal segment with 11 to 13 setae and the second with 10 to 11; 

 maxilla with the proximal segment of the galea bearing four setae 

 on its mesal margin; ligula with four fine setae at its ventro-distal 

 end not arranged in a transverse row, the two mesal setae caudad of 

 the lateral ones; proximal segment of the labial palpus with five to 

 seven setae and the distal segment with one. 



Thorax. — Pronotum with the cephalo-lateral angles extending cep- 

 halad of the mesal portion, lateral margins slightly carinate, primary 

 setae large and prominent, secondary setae small and not numerous 

 (fig. 79). 



Ahdomen. — Chitinized areas distinct; secondary setae numerous, 

 part of them long and slender, the others short and fine and occurring 



