THR CANADIAN ENTOMOLOGIST. Ill 



four to twelve feet from the level of the river. \\'ith these species that 

 dig into banks of streams the holes are usually somewhat on the slant. 

 One hundred and forty-eight specimens were dug out, and their holes 

 measured. In sandy soil these averaged i6 inches, deepest 20 inches, 

 shallowest 10 inches. In clay or gravel the average depth was 7 inches, 

 deepest 10 and shallowest 2 inches. 



Two or three specimens were often found in the same hole, and 50 

 or more might be dug out within the space of a square yard. 12-outtnta 

 is the latest of the Aweme tiger-beetles to hibernate, specimens in 1906 

 being still numerous on the 14th of October, and a few were found quite 

 active, just commencing to excavate burrows, as late as the 20th of 

 October, after heavy frosts. 



Larva holes are usually very numerous all up the river banks near 

 where the adults hibernate. The holes generally slant obli(|uely into the 

 banks. They average in depth from 6 to 15 inches, but in summer time 

 they are often only 4 or 5 inches deep. Both larv;v and imagoes must 

 often perish in their winter homes when the water rises above them. 



C. 1 2-guttata, sub-sp., repanda, Dej. — Common along muddy road- 

 ways and wet fields. I have A)und it in abundance along furrows and 

 in wet spots in tall grain, and also on sand in wet localities, and in lesser 

 numbers on rather muddy spots along river banks. 



Repanda appears in the spring with u-i^uttata, rather later than the 

 other forms, probably owing to their habit of usually hibernating in cold, 

 damp ground, which takes longer to warm up. The old brood overlaps 

 the new to the extent of about ten days. The new brood begins to 

 appear late in July and during the beginning of August. They are one 

 of the later tigers to hibernate, and owing to their inhabiting wet spots 

 they have often to seek winter ([uarters some distance away. The\' have 

 been found hibernating fully half a mile from their summer hunting- 

 grounds, and, no doubt, in some cases go much farther. Hillsides or 

 banks with litile vegetation are usually chosen as winter quarters. In 

 sandy localities repatuhi digs to an average depth of 19 inches, the 

 deepest hole examined being 22 inches, shallowest 18. In clay the depth 

 of hole is often only 6 or 8 inches, but when foimd in company with 

 i2-guftatci their holes average from 2 to 4 inches deeper tiian that 

 species: Both 12-guttata and tranquebarica have been found in the 

 same hole as repanda while hibernating. 



