Test of evolved parasites. (A) Infectiousness of the evolved parasites and (B) number of spores found in infected mosquitoes when the parasites were tested on the four isofemale lines of the mosquito host. 'Specialized' refers to parasites that had evolved on one isofemale line; 'adapted' refers to parasites that were tested on the same line while 'mismatched' refers to parasites that were tested on a different line. 'Mixture' refers to parasites that had evolved on a mixture of the 4 isofemale lines. 'Alternated' refers to parasites that had evolved on an alternating sequence of the 4 isofemale lines. Each point gives the parasites' infectivity (A) or the mean log-transformed number of spores in infected mosquitoes (B), and the horizontal line gives the means of the pooled replicates. In (A) the vertical lines give the 95% confidence interval of the proportion, and in (B) they give the standard error of the mean.