198 THE CANADIAN ENTOMOLOGIST. 



had obtained from the original locality a good supply of specimens in 

 perfect order, and although these agreed with the original description 

 perfectly, they should only be labelled as " typical," and he was of the 

 opinion that the describer even would not be justified in labelling them 

 "type." Professor Osborn agreed with the last speaker. 



(To be Continued.) 



CORRESPONDENCE. 



NOTES ON IPS. 



In vol. xvii., p. 46, of the Can. Ent., Dr. John Hamilton gives some 

 notes on Ips fasciatus and allied forms. He says: — " The form fasciatus 

 is the most common here (Allegheny, Penn.), and is that into which all 

 the others are resolved ; in it the elytra are black with an irregular broad 

 basal, and a sub-apical fascia, yellow ; individuals are met with totally 

 black without any spot ; others have only a small basal and sub-apical 

 spot yellow (more often reddish) ; others add to these a humeral lunule ; 

 others have various other spots, and by the gradual dilation and coalesc- 

 ing of these through a series of specimens, the full form fasciatus is 

 reached." He further says that he has never met with these black and 

 spotted forms at any other time than in early spring, usually during April. 

 As the season advances these entirely disappear and the fasciate form 

 alone remains, continuing till autumn. Judging from my observations of 

 these forms at Montreal, I cannot quite agree with Dr. Hamilton's opinion. 

 I find that in the fasciate form the colour is bright clear yellow, while in 

 all the spotted specimens that I have seen the colour is very pale yellow, 

 almost white ; the difference in this respect being very marked. With 

 respect to seasons, [ find that the spotted form, or what I take to be 

 4-signatiis, occurs during summer as well as in spring, as the following 

 notes will show: — April 24th, 1886, found Ips fasciatus and the spotted 

 forms common at a bleeding stump on Montreal Mountain, 4-signatus 

 being most abundant. June 12th, 1886, found several specimens of 

 Ips 4-signatus in a small hole in the bark of an oak tree, where the sap 

 was oozing out. August 5th, 1886, found a specimen of Ips 4-signatus 

 on a tombstone in Mount Royal Cemetery. August 15th, 1886, found a 

 specimen of Ips 4-signatus on a tomato on the breakfast table. July 26th, 



