116 



Pamela S. Dolin and Donald C. Tarter 



Head 

 Width 

 (mm) 



Water 

 Temp. 



(C) 



Fig. 3. Monthly variations in larval head widths of Chauliodes rastricornis from 

 Greenbottom Swamp, Cabell County, West Virginia. Horizontal lines = means; 

 vertical lines = ranges; open rectangles = standard deviation; closed rectangles = 

 two standard errors of the mean; numbers above vertical lines = sample size; and 

 solid line = mean water temperatures. 



Pupal stage. — Pupae have been collected under bark and in decay- 

 ing logs and stumps by various authors: Walsh (1863), Weed (1889), 

 Needham and Betten (1901), and Brimley (1908). Parfin (1952) and 

 Davis (1903) reported Chauliodes pupating under rocks, and Davis also 

 observed them in rotten wood and earthen cells. Cuyler (1956) reported 

 finding C. rastricornis in pine and oak stumps as far as 25 feet from 

 water and observed eight C. pectinicornis pupae under the bark of one 

 large log on the swamp bank. 



In May, eight C. rastricornis pupae were found deep in rotten logs 

 that were drying because of receding waters. Pupae of C. pectinicornis 

 were found under bark of drying logs, and in earthen cells under logs 

 left on the bank of the swamp after water had receded. 



Seven C. rastricornis and eight C. pectinicornis were reared from 

 larvae to adults. Chauliodes rastricornis larvae transformed to pupae 

 from April 23 to May 1, with the pupal stage lasting a range of 6 to 18 



