400 AXTS. 



iionmyrmecophilous in.sccts, c. y., the epinotal glands of the ants them- 

 selves, the dorsal jJan.U of the Blattidae, the scent glands of Lepidop- 

 tera. etc. \\"asmann states that the secretion is not liquid, but " volatile 

 or etherial, perhaps a fatty ether." The ants are so inordinately fond 

 of it that he believes that it must affect them very much as a good 

 cigar alTeet> a Mimker. Perhaps it would be nearer the truth to say 

 that its fascination is more like that exercised by catnip or oil of berga- 

 niot on the various members of the cat family. Wasmann sum- 

 marizes the distribution of the trichomes, which may be developed 

 on almost any part of the body, as follows: "On the sides and 

 ba.se of the portions of the abdomen not covered by the wing- 

 cases ( Loincchnsa group of Staphylinids, many Clavigerids) ; on the 

 tip of the abdomen (Lomechusa group), or pygidium (many Paus- 

 sns i ; at the tips of the wing-cases (many Clavigerids, Chatopisthes 

 among termitophilous Scarabaeids) ; on the sides of the wing-cases 

 ( many Panssns) ; at the posterior corners or edges of the pro- 

 thorax (Pleuropterus and many Paiisstts among Paussids, Lomechon 

 among Silphids, Corythoderus and Chatopisthcs among termitophilous 

 Scarabseids, Tylois among Histerids, many Thorictus among Thoric- 



FiG. 237. Two highly myrmecophilous Pselaphids. (Original.) A, Adranes lecontci 

 of North America ; B, Claviger testaceus of Europe. 



tids ) ; on the anterior corners of the prothorax (Napochus tcrmito- 

 plulns); on the much elevated sides of the prothorax (Tcratosoma 

 among Histerids, Gnostus among Gnostids) ; in a median transverse 

 groove on the prothorax (many Panssus) ; on the neck, between the 

 head and prothorax (the myrmecophilous Napochus among the Scyd- 

 msenidse, Tetramopria among Proctotrupids) ; on a perforated horn on 

 the vertex (several Panssns} ; on the front (Pogonoxenus among Tene- 



