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extensions are bowed outward, so that they form with the forward 

 curved transversal furrow a posteriorly open circle. In the centre 

 of this circle there is a deep pit. In the hindmost third part of 

 the dorsum there is a second deep pit, central or median too, 

 and there are indistinct continuations of the lateral longitudinal 

 furrows, again bowed outward, but more remote one form another. 



Trouessart does not teil us anything of the animal's ventral 

 side, and this is characteristic too. Fig. 44 shows us the total 

 coalescence of the bases of the maxillae and of the maxillae 

 themselves ; the long coxae of the first pair of legs, which almost 

 touch in the median line, and leave a light coloured triangle be- 

 tween the maxillar plate and themselves, and a light coloured 

 line between their own proximal ends ; the nearly triangular 

 coxae of the second pair of legs, contignous with the coxae 1 ; 

 the nearly triangular coxae 3 ; the broad and nearly trapezoidal 

 coxae 4; the enormously developed trochanteres 3 and 4, especially 

 4; the genital split, shut by the two genital covers, which by 

 their transparency give us to appear the 6 genital suckers ; the 

 position of the genital opening, being one third before and two 

 thirds behind the level of the distal ends of the coxae 4; the 

 tolerably small anus, covered by two anal plates and situated far 

 backward, being remote from the posterior margin of the abdomen 

 not even its own width ; and finally the light colour of the ventral 

 side itself and the dark, almost brown colour of the chitinous 

 parts of it. 



The hairs are well described by Trouessart, viz: they being 

 „des poils fasciculés". Yes, but there are great differences between 

 the „poils fasciculés" (I propose the term „hairy hairs") of diffe- 

 rent species. In figure 45 1 have drawn one of the dorsum of our 

 present species. It is obvious that the small hairs which ornament 

 our hair are the largest on its proximal and the smallest on its 

 distal end, and that they are deviating almost 45 degrees from 

 the stem on its proximal end, and the lesser the more they reach 

 the distal end. The stem is hairy all around, but I cannot discern 

 an arrangement of its villosity in a quincunx, as Pagenstecher 



