TRUE GUESTS, ECTO- AND ENTOPARASITES. 



399 



This is best seen in the Lomechusini, Clavigeridse and Paussidse, but is 

 also apparent in many other species (certain Cremastocheilus, Silphidse, 

 Thorictidae, etc. ) which are, perhaps, degenerate symphiles. The exact 

 signification of this symphilic coloration is not known. 



2. Trichomes. Several of the earlier students of myrmecophily 

 (Erichson, Lacordaire, W. P. J. M tiller) observed that the true guests, 

 as a rule, bear tufts of red or golden yellow hairs (trichomes, or 



FIG. 236. Various species of Paussiche. (Wasmann.) A, Pleuroptenis brevi- 

 cornis ; B, Paitssus hova ; C, Pentaplatartlints natalensis; D, Paussi/s daina; E, 

 Lebioderus goryi ; F, Panssns spiniceps. 



trichodes) which are assiduously licked by the ants, and much has been 

 made of these structures by Wasmann, who regards them as the most 

 characteristic organs of symphiles. He has shown that they are borne 

 by the chitinous integument at points or depressions where clusters of 

 unicellular glands open, and that they have the important function of 

 rapidly diffusing some aromatic secretion. Glands of a similar type, 

 from which the trichomes may have developed, are present in many 



