Slattarle. 533 



SUMMARY. 



In this Catalogue 696 species of Blultarim are recorded, and 

 there are many yet unnamed. It is not easy to ascertain correctly 

 their geograpical distribution. Some species pass from one region to 

 another and multiply excessively in artificial circumstances. Other 

 species are of rare occurrence, and the continuance of them may be partly 

 ensured by their seeming to be what they are not, or by their mimicry of 

 various kinds of Coleoptera and of Myriapoda and of Isopod Crustacea. It 

 will be a matter of dispute whether or not they have assumed this disguise 

 gradually, and have by cumulative change reflected more and more the 

 forms and colours of the above mentioned kinds which dwell with them. 

 The fore wings are remarkable on account of their various structure. They 

 are generally coriaceous or corneous like wing-cases, but in some species 

 they are membranous like true wings, or are partly coriaceous, partly 

 membranous. The right fore wing usually differs in structure from the left 

 one, its covered part being more membranous than that of the left one, 

 and sometimes unlike it also in colour. The hind wings are longitudinally 

 folded, but in some species they are transversely folded like those of 

 Coleoptera. The groups cannot be arranged according to their affinities iu 

 a line, or in a circular series: in other words, several different linear 

 arrangements may equally well express the natural system. The Nuditars<B 

 are distinguished from the MuliccB and from the Spinosm by their having 

 no arolia between the ungues, and the Muticce differ from the Spinosce in 

 having no spines or bristles on their femora; but in each of these 

 divisions there are groups which are evidently not analogous, but nearly 

 allied to groups iu the other two divisions, and in a future arrangement 

 the above characters will probably be considered as of less importance. 



2h 



