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REPOET ON ZOOLOGY, MDCCCXLIII.

(4) Two dorsal segments are opposed to the first abdominal, and also tothe last ( Heterocerida , Hydrophilida, Spharidida); occasionally also the cor-responding segments of the abdominal and dorsal surface are dislocated fromeach other, as in the Calandra and Histeres .

In these researches the author has undoubtedly proceeded in a right track,and the results at which he has arrived contain much demanding attention; butthey require, nevertheless, to be corrected in many respects. He has examinedonly dried specimens. The stigmata also must not be passed over without atten-tion. In the larva the eight anterior abdominal rings are always furnished withstigmata; accordingly it remains also to determine which of the dorsal seg-ments in the Beetle possess them. In general their number is reduced inproportion to the number of the segments, so that in the Beetle one segmentmore (the last),than pairs of stigmata, is still found; although some exceptionsto this exist. The first segment, however, is never observed to be withoutstigmata, as the author supposes to be the case in Staphylinus (p. 52). TheBeetles , also, must be compared more closely with their larva. Thus thelarva of Dytiscus and Hydrophilus have only eight abdominal rings. Tor sys-tematic purposes, an accurate knowledge of the composition of the abdomenof the Coleoptera is of importance, since in general it is uniform through-out the same family; rare and striking exceptions are presented by the Tri-chopterygida and Lymexylonida.

Guerin has begun a work which is intended as a compre-hensive memoir on this Order; it is entitled, “ Species etIconographie generique des Animaux articules, ou represen-tation des genres avec la description abregee de toutes lesespeces de cette grande division du regne animal, ouvrageformant une Serie de Monographies completes. Ire partie,Insectes Coleopteres .” The author has commenced with theMonographs of those genera which require them most—viz. the Malacodermi.

I will report below on the few of these monographs which havereached me. It is a great evil that Trench works frequently appear in suchsmall parts as the present, and so irregularly; it is scarcely possible for us toobtain such a one complete. In future, I hope, by direct communicationwith the Editor, to be placed in a condition to report fully upon the progressof the undertaking.

Catalogue of the Collection of Coleoptera of Jacob Sturm .(Catalog, der Kafersammlung von Jacob Sturm. Mit6 ausgemalten Kupfertafeln. Niirnberg, 1843.)

This is the fourth catalogue of his collection which the worthy author has