74 



31 OS QUI TOES 



trumpot-sliapcd broatliiiif^ org-ans, which now issnc from 

 the thorax and no longer from the abdomen as with the 

 larva. In Oulex pungens, these ear-shaped, trumpet-like 



Fifi. 11. — Adult male of Cnkx pungens; with parts enlarged. (Author's 

 illustration.) 



breathing: org-ans are rather slender and of the projior- 

 tions indicated in the fig-ure. 



The duration of the pupal staq-e in midsummer with 

 this species at Washing-ton is about two daj'S. A mini- 

 mum generation, therefore, of Culcv punr/cns will occupy 

 ten days, as follows : sixteen to twenty-four hours for the 

 egg- ; seven days for the larva, and two days for the pujja. 



