44 THE CANADIAN ENTOMOLOGIST 



The illumination used was daylight, the whole apparatus 

 having been set up in a large bay window looking north. A camera 

 extension of 18 inches was employed, which, with the 2-inch lens, 

 gave an image enlargement of 8 diameters. The ground glass of 

 the camera is provided with a clear spot in the centre, and on this 

 the image was critically focussed with the aid of a focussing 

 magnifier. The lens was stopped down to f .45 to gain the neces- 

 sary depth of field, and the required exposure was calculated with a 

 Watkins exposure meter, the normal time, as shown by the meter, 

 being multiplied by the square of the magnification, in this case 64. 



The plate was a Wratten & Wainwright backed panchromatic, 

 but as it was used without a screen, any good ortho plate would 

 have given much the same result. It is customary in photographic 

 data to mention the developer, but for ordinary negative work 

 there is no essential difference between the many developers on 

 the market, and one should always use the solution one is ac- 

 customed to. Personally, I admit a preference for the well known 

 "B.J." pyro-soda, and with this the spider negatives were de- 

 veloped. Several exposures were made of different views of the 

 spider, and thanks to the excellent lens and small stop, all the 

 negatives turned out so sharp and with such good depth of focus 

 that they can be enlarged to any reasonable size. In fact I have 

 enlarged the "portrait" to 75 diameters, and only stopped at that 

 size for want of a larger sheet of bromide paper. The image would 

 not be unduly soft at 150 or 200 diameters. 



The spider proved a most amenable sitter, and would remain 

 motionless for an indefinite time in any position she was put in. 

 But if the poison of the wasp had fettered her limbs, it had not 

 tamed her ferocious spirit, for I can read a felonious glare in those 

 nightmare eyes. 



After photographing her, I kept her under observation in a 

 pill box to see if the effects of the wasp's sting would wear off. 

 After about a week the paralysis seemed to be passing, and she 

 began to make a few constrained movements. I hoped, if she re- 

 covered, to set her free once more on her native beach. But who 

 can escape his fate? The very steps we take to avoid our destiny lead 

 us irresistibly towards it. This spider's doom was to be eaten 

 alive by a wasp larva, and it found her even in the pill box; my 



