Vertebrata 105 



nigcr 5 was killed in each case: the iimhratus :,; :, , though smaller, have raore po- 

 werful mandibles. 



The observations on Antennophoriis show that these commensals are killed 

 if the come into contact with formic acid: it appears probable that the ants to- 

 lerate these tenacious acarines because their mandibles are not strong enough to 

 remove them and because they have not sufficient intelligence to use their for- 

 mic acid for this purpose. H. Scott (Cambridge). 



263) Doiiistliorpe, H. St. J. K., Myrmecophilous notes for 1912. In: Ent. Record 

 and Journ. Variation, \U\. 25, Heft 'S, S. 61— Ü8, und Heft 4, S. 89—97, 1913. 



Among other observations on British ants in 1912, the following are reconled. Six 

 g V of Ponera coari tata Latr., found in a nest of Formica fusca, were placed in an Ob- 

 servation nest of F. fvsca from quite another part of the country: the F. fusca never 

 attacked the Fonerct, though the bitter moved freely about in their nest. In September 

 a Mynnecina grcwiinicola w. was found in a nest of Lasius flavus: this is not the tirst 

 time M. gramimcoin has been found with other spp., and possibly the + of the Myrim- 

 cina offen seeks the protection of another ant's nest to found her colony, as does the 

 ^\nierican subsp. of 31. graminicola. Forviicoxenus nitidulus Nyl. is recorded for the first 

 time from Scotland, where it was found in a nest o{ Formica rufa. In the case of Lep- 

 tothorax acervonim it is stated that not only do J ¥ as well as 5; ;,; carry larvae and 

 pupae about, but that even " have been seen so doing. A case is recoi-ded of a v X«- 

 siiis umbratus var. mixto- iimhratus being found acting as queen in a nest of Lasius niger 

 subsp. aLenas: the whole nest was had uuder Observation, and the alienus $ y tended 

 the mlxto-mnbratus +, even on one occasion killing some of their own winged $ i. An 

 attack of Formica sanguinea on a nest of Lasius umbratus is described: a row of san- 

 guinea $ J? stood on guard outside the umbratus nest, while others had penetrated into 

 the nest, and many dead umbratus lay on the field. The second portion of the paper 

 contains notes on a nuraber of creatures found in ants'-nests. On pp. 91, 92 is an ac- 

 count of the feeding of a myrmecophilous beetle (Awphotis margmata), which had been 

 found in a nest of Lasius fuliginosvs, by the 'j ;? of an Observation nest of L. umbratus 

 var. mi.rto-umhratus, into which it had been introduced. There is also a note on the 

 beetle Clythra 4-punctata, the larvae of which devour the pellets and droppings of the 

 ants in nests of Formica rufa (p. 93). H. Scott (Cambridge) 



Hierzu; Nr. 162, 180, 181, 187. 



Yertebrata. 



264) Boß, K. (A. Fleischmann, Die Kopfregion der Amnioten. XVI.j 

 Studien über die Entwicklung des Gehirns bei FringiUa canaria 

 und Chelydra serpenfina. In: Morpholog. Jahrbuch, Bd. 45, Heft 3, S. 335 

 bis 392, 1913. 



Embryonen von FringiUa canaria, Kanarffenvogel, und einer Schildkröte, 

 Chelydra serpentirm, wurden, nachdem sie in Umrissen gezeichnet worden waren, 

 in Serien geschnitten und nach diesen zahlreiche Modelle hergestellt. 



Nach einem geschichtlichen Rückblick bespricht Verf. an Hand der Modelle 

 die Formentwicklung vom Außen- und Innenrelief des Gehirns beider Arten in je 

 sechs verschiedenen Stadien und geht kurz auf die topographischen Beziehungen 

 der Hirnanlagen und der übrigen Organanlagen des Kopfes ein. 



Aus seinen kritischen Erörterungen sei kurz folgendes angeführt: „Die 

 Krümmungen, überhaupt die Metamorphose des Hirns stehen in enger Abhängig- 

 keit zu anderen Bezirken des Kopfes und ändern sich mit deren Entfaltung." 

 „Während verschiedener Erabryonalphasen gelangt die Außenfläche des Kopfes, 

 des Gehirns, der Mundrachenwandung, der Nasenschläuche usw., kraft ihrer Vo- 

 lumzunahme in verschiedenen Ebenen, welche ähnlich und im allgemeinen kon- 

 zentrisch zueinander liegen." 



