Oudemans, Notes on Äcari. 



391 



deutonympha called by him „femelle accouplee" he has not ob- 

 served the posterior dorsal shield, which, as our figure 1 shows, 

 is divided in two shields, a large one and a minute one ; the large 

 one is more or less trapezoidal and divided in an anterior larger 

 portion an a posterior smaller portion ; the latter is better 

 chitinized and therefore 

 darker than the former; 

 the minute one is se- 

 parated from the larger 

 one by a transverse wide 

 band of unprotected skin, 

 is dark, strongly chitin- 

 ized and quite marginal 

 (terminal). 



Robin, 1877, only 

 figures the abdominal 

 lobes of the male , and 

 the egg. 



Haller, 1878, only 

 mentions the sexual dif- 

 ference of the 4^^ pair 

 of legs , which is rela- 

 tively small. 



Canestrini's descrip- 

 tion , 1878, is scarcely 

 good enough to recognize 

 the species , if he had 

 not called it cypseli] 



Canestrini in 1879 

 only mentions the name, 

 which, taken after fig. 8 

 of Robin , is wrong , of 

 course. 



Megnin, 1880, only 

 mentions the name. 



Trouessart, 1885, only mentions the name. 



Canestrini, 1886, gives a very short description of the male, 

 the female , the deutonympha and the larva ; his figure is good 

 enough to recognize the male. 



Groult, 1887, describes the creature too short to recognize it. 



Berlese , 1888 , describes and figures the adults short but 

 good; only the posterior dorsal shield is entire , not divided in 

 two pieces ; apparently he has overlooked this arrangement. The 

 epigynium is drawn too large. 



Yig, 8—10. Eustathia cultrifera (Rob 



