16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



T.\BLE TO IHH GENERA OF CICINDEblDAE. 



Ocelli 1 and 2 subequal in size 1 



Ocellus 2 distinctly smaller than ocellus 1 4 



1. Lateral hooks not present ; legs with distinct, movable tarsal claws 2 



Lateral hooks present and produced at the anterior end of a chitinized 



area, laterad of the median hooks ; legs without distinct tarsal claws, 

 tarsus and claw combined 3 



2. Median hooks long, curved and sickle-shaped, pointing outward ; inner hooks 



short, cylindrical and usually with the distal end suddenls' constricted into 

 a spine-like projection ; ridge on the caudal part of frons U-shaped and not 

 joining the ridge on the caudal part of the vertex ; palpiger with a distinct 

 chitinized sclerite, proximal segment of labial palpus with two or three 



spine-like projections on its ventro-distal margin Genus 1. Cicindela, p. 16. 



Median hooks thorn-like, straight or very slightly curved inward; inner 

 hooks similar in shape to the median hooks and about one-half as long; 

 ridge on the caudal part of frons transverse and joining the ridge on the 

 caudal part of the vertex ; palpiger membranous, proximal segment of 

 labial palpus without spine-like projections on its ventro-distal margin. 



Genus 2. Tetracha, p. 57. 



3. Head with the ridge on the caudal part of frons U-shaped and not continu- 



ous with the ridge on the caudal part of the vertex ; arms of the epicranial 

 suture uniting and frons not extending to the occiput. 



Genus 3. Collyris, p. 61. 

 Head with the ridge on the caudal part of the frons slightly sinuate and 

 continuous with the ridge on the caudal part of the vertex ; arms of the 

 epicranial suture not uniting and frons extending to the occiput. 



Genus 4. Probably Ctenostoma, p. 63. 



4. Antenna not separated from the mandible by a transverse chitinized bar, sec- 



ond segment not twice as long as the proximal segment ; palpiger with a 

 distinct chitinized sclerite, proximal segment of labial palpus with a 

 single spine-like projection on its ventro-distal margin, proximal segment 

 longer than the distal segment; lateral hooks present— Genus 5. Omus, p. 65. 

 Antenna separated from the mandible by a transverse, chitinized bar, second 

 segment twice as long as the proximal segment ; palpiger without a chitin- 

 ized sclerite, proximal segment of labial palpus without spine-like projec- 

 tions on its ventro-distal margin, proximal segment shorter than the distal 

 segment; lateral hooks absent Genus 6. Amblychila, p. 69. 



1. Genus CICINDELA Linnaeus. 



Head with the ridge on the caitdal part of frons U-shaped and not 

 continuous with the ridge on the caudal part of the vertex; latero- 

 clypeus distinct, rectangular; anterior margin of the labrum smooth; 

 ocelli 1 and 2 subequal in size, ocellus 3 larger than ocellus 4, and 

 not adjacent, ocelli 5 and 6 small and inconspicuous; antenna sepa- 

 rated from the mandible by a narrow, transverse, chitinized bar, 

 the second segment not longer than the other segments combined; 

 maxilla with the ventral sclerite of the cardo triangular and bear- 

 ing a single seta, lacinia apparently absent, maxillary palpus with 

 three, but occasionally two segments, increasing slightly in length 

 from the proximal to the distal segment, the proximal segment with- 



