Corydalid Life Histories 



117 



days; x = 12. Chauliodes pectinicornis larvae transformed to pupae 

 between June 26 and July 28, with the pupal stage lasting from 8 to 17 

 days; x = 10. 



Adult stage. — Seventy-seven C. rastricornis adults were collected 

 from 9 May 1979 to 2 June 1980. The peak emergence was on 9 May, 

 with 28 adults trapped in the night light per hour. Only five C. pectini- 

 cornis males were collected between 14 and 30 July by light-trapping, 

 even though trapping between 9 PM and 3 AM occurred from May to 

 the end of August. This could be due to the low occurrence of C. pecti- 

 nicornis in the swamp. 



Davis (1903) reported collecting adult Chauliodes between 14 and 

 16 June, noting they lived only a few days in captivity and would not 

 eat. Smith (1922) reported collecting adult Chauliodes in June, and 

 Chaplain and Kirk (1926) trapped C pectinicornis from 11 July to 6 

 August in a fermented syrup of molasses and water. Tarter et al. (1977) 

 recorded C pectinicornis emerging from 28 February in Louisiana to 1 1 

 November in Maryland, with the West Virginia emergence from 22 May 

 to 9 September. Chauliodes rastricornis emerged from 10 January to 28 



Head 

 Width 

 (mm) 



1 



July 



Water 

 Temp. 



(C) 



Fig. 4. Monthly variations in larval head widths of Chauliodes pectinicornis 

 from Greenbottom Swamp, Cabell County, West Virginia. Legend symbols are 

 the same as in Figure 3. 



