1898.J 103 



A. GrEOFFEOTI, Miill. 



Two forms of A. Geoffroyi, Miill., are abundant in Britain, one 

 with a large humeral spot on each elytron, the other with a humeral 

 and an apical spot on each elytron. The 4-spotted form, with the 

 basal and apical margins of the thorax fulvous (= subfasciata, Steph., 

 and vulcania, Schilsky), is apparently rare, but I have found it at 

 Ashtead, Surrey. Schilsky enumerates five varieties, including one 

 with a fulvous thorax, and I have recently seen another, found by Mr. 

 Harwood near Colchester ; this latter having the legs, antennae, palpi, 

 and body black, the elytra with only the faintest indication of a 

 paler humeral spot. An entirely black specimen has already been 

 recorded by me.* 



A. Garneysi, Fowl., and A. sppfentrionalis, Ch., are not noticed 

 in any way by Schilsky ; I cannot identify either of them with any 

 of the numerous species so well described by him. 



Horsell, Woking : i 



April 1st, 1898. 



FUETHER NOTES ON THE DIRECT PHOTO&RAPHIC ENLARQEMENT 



OF ENTOMOLOaiCAL SPECIMENS, 



WITH DESCRIPTION OF A NEW APPARATUS. 



BY T. A. GERALD STRICKLAND, F.E.S. 



Since writing on this subject in the April, 1897, number of the 

 Entomologist's Monthly Magazine, I have been experimenting with 

 incandescent gas as an illuminant with satisfactory results. I find it 

 easier to light the subject evenly ; smaller insects, such as some of the 

 Dipfpra, single wings showing the nervures, &c., can be enlarged 

 (which is of course most useful for the illustration of books, articles, 

 etc.) ; and last, but not least, we are independent of daylight. I have 

 had an apparatus made specially for the work, which can be used with 

 gas, oil lamps or daylight (see diagram). It is a large instrument, 

 taking a plate 12 x 10 ins., and its greatest length is 6 feet, stretch of 

 bellows 4 feet, focal length of lens (Ross' Universal Sym.) 6 ins. It 

 is made this large size as I shall use it for many other things besides 

 Entomology. A good size for doing insects solely would be, greatest 

 length 6 feet, stretch of bellows 4 feet, and size of plate 4i x 3i ins. 

 (quarter plate). 



I will now proceed to describe the apparatus. The numbers of 

 course refer to the diagram. (I) is a sheet of plate glass on which 

 tho specimen to be photographed is fastened. K small insect is lightly 



• Ent. Mo. Mag., xxxi, p. 207 (1895). 



