160 Notes on some Hymenopterous Parasites 



generations of C. rapae produced each year. One generation emerges 

 in April and May, and the majority of the second generation in August. 

 A few individuals, however, emerge during the later months of the 

 year. I have a record of one specimen which emerged near the end 

 of December, 1914. 



4. Of Hemiteles crassicornis, one of the two species of parasites 

 obtained from the celery-fly puparia, Morley (loc. cit. p. 141) notes that 

 it is doubtless common, and had not then (1907) been bred. I obtained 

 it from puparia collected in October, 1913, in the garden of Mr H. Bury, 

 High Lane, Cheshire, together with — 



5. Adelura apii, a Braconid, which, according to Marshall (Monog. 

 of Brit. Bracon. Pt. vi. pp. 367-8) has been frequently reared from 

 Acidia heraclei. Mr Bury sent me thirty-eight celery-fly puparia, 

 and of these thirty-four were parasitised. Three examples of A. apii 

 were observed on December 6th, 1913. No further parasites were seen 

 until April 30th, 1914; between this date and May 14th seven H. 

 crassicornis emerged, and on August 11th another individual of this 

 species was obtained. Of the eight Hemiteles obtained four were 

 females and four males. 



In 1914 the first Adelura was recorded on May 16th, and subsequently 

 they emerged at intervals of two or three days until June 23rd. Between 

 these two dates 16 specimens were reared. No further examples were 

 noted until August 1 1th, when another individual was obtained. Twenty 

 A. apii were obtained altogether and of these seven were females and 

 nine males; the sex of four individuals was not determined. Two of 

 the celery-fly puparia were opened in January, 1914; they contained 

 fully fed parasitic larvae, and only four celery-flies, which emerged 

 at various times, were obtained altogether. An examination of the 

 remaining puparia was made and four were found to contain dead 

 parasites, of which one was A. apii. 



From thirty-eight puparia of Acidia heraclei were obtained : 



4 Acidia heraclei (adult flies). 

 8 Hemiteles crassicornis. 

 20 Adelura apii. 

 2 parasitic larvae. 



4 dead parasites which failed to emerge, one of which 

 was A. apii. 



38 Total. 

 As may be seen, the number of infected pupae was very large. The 



