ART. 17. LARVAE OF HOLARCTIC TIGER-BEETLES HAMILTON. 71 



perfectly circular. The burrows have quite a characteristic way of going 

 straight down for about 18 inches and then, turning to an angle of about 45° 

 downward, proceed about 18 inches farther. This lower portion has a 

 tendency to be feebly spiral. The burrow for the last 10 or 8 inches is quite 

 noticeably enlarged, especially laterally, and the extreme end is invariably 

 packed with the remains of former repasts. The holes are generally located 

 on the brow of a cliflf, but one colony was found in muddy silt at the foot of 

 a cliff-like bank, well below the recent flood level of the stream. Still others 

 occurred on the high plain some half a mile back from the bluffs. Two or 

 three were found that had their openings in the face of the cliff. These sloped 

 back and did not conform to the normal burrows. It was often noticed that 

 these larval burrows were situated near some larger hole, as that of the field 

 mouse or badger. 



BIBLIOGRAPHY OF PAPERS REFERRED TO IN TEXT. 



Cbiddle, Norman. 



1907. Habits of some Manitoba tiger beetles (Cicindelidae). Canad. 



Entom., vol. 39, pp. 105-114. 

 1910. Habits of some Manitoba tiger beetles (Cicindelidae). No. 2. 

 Canad. Entom., vol. 42, pp. ^15. 

 Horn, George H. 



1878. Descriptions of the larvae of the North American genera of Cicin- 

 delidae. Trans. Amer. Entom. Soc, vol. 7, pp. 28-37, pi. 2. 

 Horn, Wai^ther. 



1908. The larvae of Amblychila and Omus. Deutsch. Entom. Zeitsch., 



pp. 285-286. 

 Carabidae, subfamily Cicindelinae. Genera Insectorum, fasc. 82, 

 1908, 1910, 1915, pp. 1-486, pis. 1-25. 

 Leng, Ch. W. 



1920. Catalogue of the Coleoptera of America North of Mexico. 

 Lengerken, H. v. 



1921. Carabus auratus und sein larvae. Arch, fur Naturgeschichte. 



(Wiegmanns Aj'ch.), vol. 87, pp. 31-114, 3 pis., 75 figs. 



SCHAUPP, F. G. 



1878. On the Cicindelidae of the United States. Bull. Brook. Entom, 



Soc, vol. 1, pp. 11-14. 



1879. Larvae of Cicindelidae. Bull. Brook. Entom. Soc, vol. 2, pp. 23-24. 

 1879. List of the Described Coleopterous larvae of the United States with 



some remarks on their classification. Bull. Brook. Entom. Soc, 

 vol. 2, pp. 1-3, 21-22, 29-30. 



SCHIODTE, I. C. 



1867. De Metamorphosi Eleutheratorum observationes. Carabi, Natur- 

 historisk Tidsskrift. Copenhagen, ser. 3, vol. 4, p. 415, pi. 12, 

 figs. 1-17. 

 Shei^fobd, R. 



1907. The larva of Collyris emarginatiis Dej. Trans. Entom. Soc Lon- 

 don, pp. 83-90, pi. 3. 

 Shelford, V. E. 



1907. Preliminary note on the distribution of the tiger beetles and its 



relation to plant succession. Biol. Bull., vol. 14, pp. 9-14. 



1908. Life-histories and larval habits of the tiger beetles (Cicindelidae). 



Journ. Linn. Soc. Lond., Zool., vol. 30, pp. 157-184, pis. 23-26, 

 figs. 1-53. 



