A. C. OUDEMANS, NOTES ON ACARI. 199 



The female (Canestrini's fig. 1) is posteriorly truncate, with 

 almost imperceptable median excavation, and with posterior 

 angles obliquely cut off; anteriorly it is wider than posteriorly; 

 its legs are all equal in size ; its epimera I are not joined 

 to a sternum (here we have, I presume, the representation of 

 the reality) ; the epigynium is crescent-shaped, the vulval lips 

 strongly chitinized, & configurate a A ; the nephridia are very 

 distinct. 



Canestrini's fig. 3 gives us a wronger idea of the outlines 

 of the female, as it shows us a creature gradually becoming- 

 thicker backward, and posteriorly excavate deeper as usual. 

 But moreover it has the following characteristics. The marjïin 

 of the prosoma is dark, strongly chitinized ; the anterior shield 

 occupies the whole space between this dark margin, extends 

 thus also behind legs II. The lateral shields and the posterior 

 dorsal one are well represented. 



This species inhabits Tofanus calichis, Tringa alpina, Tt'inga 

 minuta, Phalaropus platyrrhynchus, Limosa melamira, Machetes 

 picgna,v, Mergus serrator. — It is improbable that this species 

 should occur in Mergus serrator. It is probable that it lives 

 on the other named birds, but provisorily 1 admit only its 

 occurrence on Totanus calidris, as Canestrini has baptized it 

 totani. 



2. Avenzoaria tringae (Oudms.). 



1887. Pterolichus totani Berlese, Acar., Myr., Scorp. Ital., 

 fase. 38; n". 2. 



1904. Pterolichus tringae nov. nom. Ouddmans in Entoraolo- 

 gische Berichten, n". 19, p. 171. 



Berlese's species is quite another one as Canestrini's. There- 

 fore I have rebaptized it. From the descriptions and figures 

 I distil the following description. 



Male: Shape. It is behind the legs III suddenly nar- 



