1895.] Entomology. 683 
This Acarid has been found in the interior of the quills of the wings 
(rémiges et couvertures alaires) on the domestic hen ( Gallus domesticus), 
on the sparrow (Passer domesticus), and on a great number of other 
birds belonging to the genera:—Syrnium, Eclectus, Poocephalus, 
Chalcopsitta, Picus, Fringilla, (var. major on F. montifringilla), Em- 
beriza, Linota, Coccothraustes, Troglodytes, Anthornis, Parus, Orites, 
Turdus, Hirundo, Caprimulgus, Trogon, Phasianus, Meleagris, Gallin- 
ago, Aramus, Strepsilas, Vanellus, Totanus, Tringa, Anthropoides, 
Sterna, Hydrochelidon, Larus, Anas, etc. 
From this list, we see that the species may be considered as univer- 
ally dispersed and really cosmopolite. If we compare the types of 
these various origins, we find no other difference than the size. 
The form found by Mr. J. L. Hancock upon the flycatcher (Pheno- 
pepla nitens Fer.), is absolutely the same that the typical Syringophilus 
bipectinatus from Europe.. It cannot be placed in the genus Picobia 
(Haller) which possesses for differential characters :—Pedes dissimiles ; 
primi et secundi paris tarsus cirro longo, bifido, terminatus; tertii et quarti 
paris tarsus, unguibus binis recurvis et pectine duplici (pulvillo) in- 
structus. 
On the contrary, the type figured by Mr. Hancock has the characters 
of the genus Syringophilus :—Pedes omnes similes, unguibus binis re- 
curvis et pectine duplici instructi. This type is then connected with 
this last genus. 
I must add that, from my observations, the form named “ Syringo- 
philus” is not adult and represents only the syringobial and partheno- 
genetic form of a species of Cheyletus described by Doctor S. A. Poppe 
(from Vegesack) under the name of Cheyletus nörner?, which is found 
also in the quills of the feathers of the birds enumerated previously, 
feeding on the Sarcoptids (Analgesine) which live there habitually. 
I have lately* drawn the attention of naturalists to the habits of these 
various syringobial forms, and I have shown that the Cheyletus 
nörneri (Poppe), which devoured the Pterolichi and Syringobie which 
live in the quill, never touches the Syringophili, doubtless by virtue of 
the saying: “ les loups ne se mangent pas entre eux.” 
1 38, A. Popper, Uber parasitische Milben (Abhandl. Naturw. Ver. Bremen, 
[1887] X, p. 239, pl. II, fig. 4-5) 
t E. TROvEsSART, Sur le Mimétisme et (instinct protecteur des Syringobies (Bulle- 
tin de la Société Entomologique de France, 1894, p. CX XXVI).—id., Sur 
la Parthénogenise des Sarcoptides plumicoles (Comptes-Rendus de la Sociéte de 
Biologie, 26 Mai, 1894 :—C.-R. Académie des Sciences, CX VIII, p. 1218). 
