164 (de. a. c. oudemans). new list or dutch acari, t. 



and 8 of Vol. XXXIX of the Tijdschrift voor Entomologie is wrong 

 This organ is \ery short and davate with ahnost globular head. 

 In fig. 2 the position of these organs is wrong too. The spectacle- 

 shaped figure on the céphalothorax is nothing else but the distinctly 

 visible pseudostigmata and the lamellae; these being two bars, 

 running from the pseudostigmata forward , converging considerably. 

 Eremaeus confervae (Schrank), contrary to my supposition pro- 

 nounced on p. 170 of the above-named Tijdschrift is very distinct 

 from Eremaeus lacustris (Michael). Of the lamellae, the pseudo- 

 stigmata and the pseudostigmatic organs Michael says (Brit. Orib. II. 

 p. 400): «No true lamellae nor translamella, but there are two 

 pairs of rather irregular ridges , one of which probably represents 

 the lamellae The inner pair of these ridges are less than half the 

 length of the céphalothorax , the outer , which are less constant , are 

 at least three-quarters of its lengtli; both spring from the base of the 

 céphalothorax, where the two ridges of each pair are furthest apart, 

 approaching more closely at their distal ends. As the creature is 

 found, usually neither the pseudo-stigmata nor the pseudo-stigmatic 

 organs project at all from the céphalothorax ; the former are exceed- 

 ingly minute roundish holes, near the base of the céphalothorax., 

 leading into short somewhat S-shaped passages closed by membranes 

 at the inner ends , and containing what appear to be the extremely 

 small , filiform , preudo-stigmatic organs which follow the shape of the 

 tubes and do not project beyond. This, however , is really a broken 

 condition of the pseudo-stigmatic organ , which has a short , very 

 thin peduncle projecting some little distance outside the pseudo- 

 stigma, and a shortly-pyriform head; this peduncle, unlike those 

 of the pseudo-stigmatic organs of all other species in the family 

 which I know, is very biittle and usually breaks off short just 

 outside the pseudo-stigma ; so generally is this the case that when 

 PI. XXXIII was printed I had not ever seen a specimen with its 

 pseudo-stigmatic organs perfect, and was not aware of the existence 

 of the club; but about Christmas, 1886, I asked Mr. E. Bostock 

 to send me a few specimens for duplicates: he kindly did so, not 

 having examined what he sent further than to see that they were 



