Page:Supplement to harvesting ants and trap-door spiders (IA supplementtoharv00mogg).pdf/36

 Savi under the name of Gryllus myrmecophilus. He detected it in the nests of several species of ants in Tuscany, where it lived on the best terms with its hosts, playing round their nests in warm, and retiring into them in stormy weather, while allowing the ants to carry it from place to place during their migrations.

Gryllus myrmecophilus has also been observed in nests of the turf ant (Tetramorium cæspitum) near Paris.

At Mentone I have never found more than this one specimen, and the ants among which it was domiciliated were of a species new to me (Camponotus (Formica) lateralis, Oliv.). This colony of ants was composed of many winged males and females, as well as workers, the last-named measuring from two and a half to three lines in length, and black in colour. In other colonies I have found the workers black, with red head and thorax.

Another ant, not enumerated in my list in ''Ants and Spiders, is Camponotus (Formica) sylvatica'', which I detected in March last under stones on Cap Martin, near Mentone. When disturbed, this ant runs along with its abdomen raised vertically in the air, much as the devil's coachhorse (Staphylinus) does. The same curious habit of erecting the abdomen is found in another ant, not uncommon in decaying wood in the South, Crematogaster scutellaris; and probably all three insects adopt this threatening attitude, which is that of the scorpion preparing to strike and sting, in