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THE CANADIAN ENTOMOLOGIST. 



Nathan Banks, and it developed that there were three species 

 present: Chrysopa rufilabris Banks, C. nigricornis Burm., and C. 

 oculata Say. The great majority of the specimens were rufilabris, 

 while but a few individuals of oculata and nigricornis were present. 

 The superficial appearance of the three species is much alike, and 

 undoubtedly the habits and life histories are likewise in the main 

 the same. 



Mr. J. C. Crawford, who has kindly determined the parasite 

 material, states that the collection, which embraces several hundred 

 specimens, is the most extensive that has been obtained from lace- 

 winged flies. He has also determined that three of the species 

 are new to science, and that their descriptions are now in the 

 course of preparation by him. The following table lists the species 

 in the relative order of abundance and indicates the maximum and 

 average number of individuals issuing from a Chrysopa cocoon in 

 the case of each species. 



Table II. — Relative Abundance of Parasites. 



It is of interest in this connection to record that Chrvsophagus 

 compressicornus, in addition to being reared frequently from 

 Chrysopids, was reared upon one occasion from an undetermined 

 Syrphid pupa. Likewise, from this same Syrphid species, were 

 reared the Chalcidoid flies — Pachyneuron allograptce Ashm., and 

 Syrphophagits mesograptce Ashm. 



