THE CANADIAN ENTOMOLOGIST. 173 



from those of Geometrid moths, as they are true loopers. Their trans- 

 formations in some particulars were exceedingly prompt. 



Prof. Riley stated that he had known certain moths, notably Leucania 

 ufiipuncta, to go through their entire transformations in fourteen days, and 

 in some instances in only ten days. 



Prof. Herri ck made enquiry as to what are sometimes known as frost- 

 flies. 



Mr. Kellicott called attention to a monograph by T. Rymer Jones and 

 one by E. Ray Lankester, to be found in the Qtiarterly Journal of Micro- 

 scopical Science, and stated that the species common at Buffalo was 

 Corethra plumicornis. 



Prof. Forbes had noticed the larvje of Corethra abundant in the 

 stomachs of fishes. 



Adjourned to meet at the call of the President. 



Friday, August 17th, 1883. 



The Club met at the call of the President at 2 p. m., in the room in 

 the University assigned to the use of Section F. 



Prof. Osborn presented a paper on the Phytoptera, a' group of insects 

 formerly regarded as the larvae of mites, the individuals of which are so 

 small as to be invisible to the unaided eye. Reference was made to one 

 form found on the soft maple, which occurs as a small swelling on the 

 upper surface of the leaves, containing sometimes a nimiber of these 

 insects, at other times only two or three. One species affects the ash, 

 occurring on both the upper and lower sides of the leaves, one on elm 

 and one on box elder, that on the last named tree having a woolly struc- 

 ture beneath the surface. This paper was illustrated by a very interesting 

 series of carefully mounted microscopic specimens. 



Prof. Riley remarked that the species which occur in Europe had been 

 well worked up there, and that in studying our species the work already 

 done on this group should be carefully examined so as to avoid the mak" 

 ing of synonyms. He considered that the hybernating habits of these 

 mites was one of the most mteresting discoveries which had been made 

 in reference to them, and he hoped that the attention of investigators 

 would be especially turned to this point. He referred also to additional 

 species which occur on the plum, cherry and linden. 



Mr. Osborn said that the Phytoptis on plum was not common in the 



