THE YOUNG NATURALIST. 



its locomotion. According to a recent German observer this slug differs from 

 all other slugs in being sexually distinct, but this needs very strongly to be 

 confirmed, for it is a departure, if correct, from one of the special and 

 acknowledged facts hitherto laid down as distinctive of the Pulmonata. If 

 correct, perhaps, we have here in this species a living link between the 

 Heteropoda and the Pulmonata. Lceuis will be distinguished from all other 

 Limaces by the following features, which are arranged as in the descriptions 

 of the two preceding species. 



1. Body dark brown bordered with violet, slender, very glossy, varying 



from J to f inch in length. 



2. Mantle pale yellowish-brown, bluntly rounded before and behind, and 



swelling behind into a lump, due to the solid shell which is placed 

 beneath this portion of it. 



3. Slime transparent, thin. 



4. Shell (under mantle) solid, unquiform or nail-shaped, very convex 



above, flat below, and without a membranaceous margin. 

 (To be continued.) 



INSECT PHOTOGRAPHY. 



By C. PHILLIPS, F.E.S. 



Insect Photography is an exceedingly interesting study for the entomologist 

 during the long evenings of winter, when he is prevented from doing much 

 out-door entomology by the boisterous weather. 



The few hints hereunder, I fear, are very elementary, but I have no doubt 

 they will be useful to some of your readers, 



1 will now endeavour to show what little apparatus is required. A good 

 microscope is indispensible, a photographic camera, a stock of plates and 

 slides, and the necessary chemicals for finishing the photo, and all is in readi- 

 ness. 



The first thing to do is, to bend the microscope to a horizontal position 

 and connect it to the camera. I find the following plan a very good one, 

 and requires little time and labour, get a good sized bung or lump of cork 

 and shape it down so as to fit tightly into the hole which was originally occu- 

 pied by the lens of the camera. Having got this to fit so as to be perfectly 

 light-tight, bore a hole in the middle of the cork just large enough to admit 

 ths eye-piece of the microscope (which must also fit tightly, so as to prevent 

 any light getting in and destroying the plate.) After fixing in this way the 

 camera to the microscope, the next thing to do is to get a strong light (for 



