240 THE CANADIAN ENTOMOLOGIST. 



or concealment, in the burrow of a Dicejxa divaricata. I also saw a 

 specimen just about to emerge from its own burrow, down which it rapidly 

 retreated backward, when I commenced to dig with my pocket knife in 

 the tough wood. On 3rd June, Mr. Fletcher and the writer saw a $ var. 

 terminals ovipositing in a minute crack in the perfectly dead dry wood 

 of the same old sugar-maple. The ovipositor of this insect was found to 

 be one and one-quarter inches in length. At the same time I obtained 

 two males, var. affjnis, and my companion captured two specimens. We 

 also saw two in their burrows, and tried to cut them out, but the wood 

 defied our knives, and the insects retired to the interior, their burrows 

 being evidently of considerable depth. The following day we saw two 

 specimens, one on a telegraph pole, the other on an old maple, and on 

 the 7th I captured on the same maple a $ var. termmalis and two ^'s 

 var. affinis. I saw also two gnawing their way out, but could not get 

 them. The last date of capture was on 9th June, when I found two just 

 about to emerge, which I succeeded in digging out after some patient and 

 difficult cutting. These were both males, one var. affinis, the other var. 

 occidentalism with two white marks on face, and a large triangular spot on 

 terminal segment above. Of twelve specimens captured by me during 

 the season (29th May to 9th June) there were var. tenninalis, three ^ ; 

 var. occidentalism one ^ , one $ ; var. affinis, seven ^ . This confirms 

 my previous observations that nearly all those with a portion of the abdo- 

 men red are female, while those with the abdomen entirely black are 

 male, although an occasional male will be found partly red, or a female 

 entirely black. In conclusion, I wish to correct a clerical error in the 

 paper above mentioned. On page 83, the seventh and sixth lines from 

 foot should read : 



1. Oryssus Sayi Westwood, 1835 == niaurtis Harris. 



2. terminalis Newman, 1838 = h(Zviorrhoidalis Harris. 



EXCHANGE. 



Mr. W. Harcourt Bath, of Lady wood, Birmingham, England, is 

 anxious to correspond with North American Entomologists with a view to 

 procuring specimens of Canadian Dragon-flies, and is willing to give in 

 exchange British Dragon-flies and Lepidoptera. 



Erratum. — Page 218, line 10, lor '-guages," read " gangues. 



