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



out a spine on the latero-distal margin; labio-stipites with a furrow 

 along the meson and without a carina on the lateral and caudal 

 margins; ligula not chitinized on the ventral aspect, palpiger area 

 with two chitinized sclerites separated by a flexible suture; labial 

 palpus with the proximal segment longer than the distal segment 

 and with two or three spine-like projections on its ventro-distal 

 margin, the proximal segment with four or five setae and the distal 

 segment with one; fifth abdominal segment with the inner and 

 median hooks present, the lateral hooks wanting, the median hooks 

 long, slender, sickle shaped, pointing outward and usually with one 

 to four setae, inner hooks short, cylindrical and constricted at the 

 distal end into a sharp spine and with two to a number of setae; 

 legs with distinct, movable tarsal claws. 



The larvae described in this genus contain a number of species 

 and subspecies from the United States and several from Europe. 

 Among those described from the United States there are several 

 which have not been positively identified and a few which are un- 

 known. These are included with the expectation that the larvae 

 may later be reared and their identity established. 



TABLE TO THD SPECIES OF THE GENUS CICINDBLA. 



1. Maxillary palpus with three segments 3 



Maxillary palpus with two segments 2 



2. U-shaped ridge on caudal part of frons bearing four or six setae; pronotum 



with the secondary setae numerous, more than 150 in number; ninth ab- 

 dominal sternum with the caudal margin bearing two groups of three 



setae each dorsalis saulcyi, p. 20. 



U-shaped ridge on caudal part of frons bearing two setae ; pronotum with the 

 secondary setae not numerous, less than 50 in number; ninth abdominal 

 sternum with the caudal margin bearing two groups of four setae each. 



biramosa, p. 21. 



3. U-shaped ridge on caudal part of frons bearing two distinct setae 4 



U-shaped ridge on caudal part of frons bearing three or four distinct 



setae 25 



4. Inner hook never with more than two setae on the shoulder ; setae on head 



and pronotum usually white, rarely transparent or brown 5 



Inner hook with more than two setae on the shoulder; setae on head and 

 pi-onotum transparent or glassy 23 



5. Pronotum chestnut brown 6 



Pronotum not chestnut brown 8 



6. Head chestnut brown ; pronotum without a color pattern 7 



Head bronze ; pronotum with a color pattern of lighter areas. 



species A, p. 22. 



7. Setae on head and pronotum brown sexguttata, p. 23. 



Setae on head and pronotum white or transparent campestris, p. 24. 



8. Median hooks with one or two setae ; if with three, one seta much smaller 



than the others 9 



Median hooks with three distinct setae 15 



