A. f', OIîDHM.WS, XOTKS ON ACARI. 85 



t e r r e i c h i S c h e V i e r t e 1 j a h r e s s c h r i f' t für wis- 

 senschaftliche A^ e t e r i n ä r k u n d e, 1 882, v. 57, 

 p. 91 — 146. (This will be confirmed by me in my Revue 

 des C h é 1 é t i n é s.) 



2. That the Si/rttKjop/ulus inhabiting diU'erent birds ditler 

 so widely, that it is v e r y easy to distinguish ditferent 

 species; this will be proved by me in my Revue des 

 Chélétinés. 



3. That the Siirinijophilus are wholly incapable to eat the 

 horny membranes present in the quill. They are not provi- 

 ded with chelate mandibles, but with stylet-shaped ones, per- 

 fectly like those of C/wletes, which the creature may dart 

 forward considerably ; their maxillae are transformed into a 

 sucking apparatus, perfectly like in Cheletes, Tetronychus, 

 J\hi/)tc/i()lophus, etc., so that their food must exist in juices ; 

 their being ])rovided with stylet-shaped mandibles indicates 

 that they do not feed on oily secretions, but on animal juices, 

 which they must procure themselves by wounding with their 

 mandibles either syringobious Surcoptidae, or the living papilla 

 of the feather. 1 think this latter is the case, for I examined 

 a quill of a hen in which were found hundreds of Si/riiufO- 

 j>hilH>< and not one Analgesinae. 



4. It is not true that males are rare. Mr. Tkot kssart has 

 not reeogiiized them. But Nörnkr has described and delineated 

 them. NcMiXKR has described and delineated the penis and its 

 chitinous skeleton, and distinctly mentions that the genital 

 opening of the male is dorsal, a well known fact in Ckeletidae. 

 A-nd I myself found more males than females! 



5. The males of NöRNKR(»certainsnaturalistes":hithertoNöi{NKK 

 was the first and the last who saw males before myself) are really 

 males, provided with a })enis with chitinous sceleton and dorsal 

 genital opening, not »des nymphes plus jeunes et plus courtes". 



Ö. The females of Nöunkr are really females, provided with 

 a large vulva before the anus, not »des nymphes plus âgées 



