FURTHER NOTES ON ACARI. 121 



Fig. 31 represents a pseudosligmalic organ ; as will be seen it 

 resembles more that of Soutovertex ovalls var. slctdas , than that 

 of the type (conf. Berlese, A. M. S. 35 , 7 and 8). 



I propose to change the « key » on page 29 of Das Tierreich , 

 Oribatidae , as follows : 



^ Ung. monod. — 2. 

 ^ \ Ung. trid. — 3. 



j No Psstg. nor Psstg. org i. S.hillneatus. 



j Psstg. and Psstg. org. present ^. S. caelatus. 



I No Psstg. nor Psstg. org 3. «S. spooji. 



I Psstg. and Psstg. org. present — 4. 



iLam. and Triam, thickened bars , or ridges , 

 or scarcely visible. — 5. 

 ^ Lam. blade-like. — 7. 

 i 2 indentations in post, margin of Abd. , a spine 



5 ^ in each 4. (9. hurlull. 



{ No indentations in post, margin of Abd. — G. 



( Dors, of Abd. slightly arched b. S.corruffutus. 



5 \ Dors, of Abd. with arched centre and broad , 



( flat , peripheral band Ç). S. maculatus. 



( C. lam. long. , blunt , curved 1. S. sculptus. 



( G. lam. very short, hardly existing . . .S.S. ovalis. 



11. List of Acari collected by Mr. S. A. Poppe. 



Mr. S. A. Poppe, the well-known author of Myobia-studies , 

 gently procured me the following Acari. 



1. Bermanyssus gallinae (de Geer). — On Gallina gallas L. , 

 Varel , 6 ex. 



2. Lciognathus aroualus (G. L. Koch) — On Vdsperugo plplsirelliis, 

 Lemforde, and on Vespertilio m.îirinus , Vegesack, 11 ex. 



3. Celerlpes ves^iertUio^iis (L.). — On Vesperugo serotinus, 

 Vegesack, and on Vespertilio miirinus , Vegesack, 11 ex. 



4. Laelaps agilis (G. L. Koch), nympha generans. — On Arvicola 

 arualis , Vegesack , 24 ex. 



5. Farasitus coleoptratorum (L.) , nympha coleoptrata. — On 

 Arvicola glareolus , Fuchsberg, June, 1 ex. 



