150 



caught the females which directed their way into the svarms, I have never got a 

 female with a blood-filled intestine. It seems as if C. pipiens upon this point is in 

 accordance with Stegomyia fasciata: first mating process and then blood nourish- 



Fig. 18 a, b, c, d. A series of cuts through the abdomen of C, pipiens. 



a, in the last part of October, a few days after the mosquito has been hatched, b, in April after having 



hibernated, c, in the first days of June immediately after bloodsucking, d, eight days later. 



a heart; b malphigian tubules, c ovaria, d intestine, e fat body, /"ventral cord in all the figures. 



ment, quite the opposite of what we have seen is the case with 0. lutescens. I con- 

 tinued the observations in my garden, till the bad^autumn days arrived, and found 



