42 (db. a C OrDEMANS). NEW LIST OF DUTCH ACARI, II. 



47, Macrocheles lonrjispinosus (Kram.) 

 (With Plate 5, tig. 94—96). 



Berlese seems not to liave observed the epistoma quite well. 

 His figures in his Acari, Myr. et Scorp, Ital., fase. 43 no 10 and 

 fase. 44, no 1, are wrong. I have examined proto-, dento-, trito- 

 nymphae and adults, and all their epistomata are perfectly of the 

 same outline, varying only slightly. The two limits of these va- 

 riations are drawn in fig. 94 and 95, All the specimens bear the 

 characteristic 4 slender hairs behind the vertical hairs (in the neck). 



The peritrema of the protonympha is a very short and crooked 

 tube (Fig. 96). 



48. Macrocheles longulus (Beri.) 



Berlese (Ac. Myr. Scorp. Ital. 43, 9) figures too few davate 

 hairs on the animal's dorsum; there are much more of them. In 

 the central part and in the posterior half of the dorsum the animal 

 bears moreover 8 smooth hairs, like Macr. longisp'mosus (Kram.). 

 The epistoma is sometimes different from that , figured by Berlese; 

 the central spine erecting from a horizontal spinous base , not from 

 two bases running obliquely towards this spine. The two mala 

 maxillae inferiores diverge as to imitate the bifurcate median spine 

 of the epistoma of other species {murginuhts , vagahundus, etc.). 



49. Macrocheles tridentinus (G. et R. Can.) 

 (With Plate 5, fig. 97—103). 



^\\Q protonijnipha, still undescribed, has two dorsal shields (Fig. 97), 

 and a peritrema resembling that of the protonympha of J/ßr;w/if(?g,s 

 longispinosus (Kram.) (vide fig. 96). Its epistoma (Fig. 99) has the 

 usual bifurcate hairy appendage at its top, but the lip on which 

 this appendage is planted is not bufurcate, as in the adult, but 

 only more or less broad and serrated. Length 525 /'. All the hah's 

 of the body are hairy in their distal half. (Fig. 98). The anal shield 



