HOLLAND. 29 



of the Zoological and Botanical Association of Vienna) ; also of the nests of Hydro- 

 philus piceus, which he had found in the great majority of instances composed by 

 preference of the leaves of Polygonum amphibium. Eyndhoven noticed a second 

 species of Biorrhiza, which also produces gall-like swellings of the radicles of 

 the oak. Herklots exhibited drawings of the larva of Anoncodes melanura ; the 

 description of which we here extract, as it does not seem to have been known 

 before : — The body is elongated, somewhat depressed. The head broad, quad- 

 rangular, scarcely half as long as broad ; the antennae inserted at the sides of the 

 mouth, projecting straight forwards, composed of three joints, the first two cylin- 

 dric, the second very long, the last joint much more slender, short, and seta- 

 ceous ; the eyes not distinguished, but they are probably placed in two dusky 

 spots close by the insertion of the antennae. The labrnm semicircular, beset with 

 hairs on the upper side and along the edge, corneous and brownish, with a trans- 

 verse brown band in front of the clypeus. Mandibulae stout, broad at the base, 

 tapering quickly to a point, without teeth, but two- cornered under the point. 

 Maxillae more membranous, obliquely truncated above, pretty thickly set with 

 short bristles along the inner margin, rounded at the back, broad, and furnished 

 with a three-jointed palpus, the last joint of which is horny and brownish 

 Labium long and narrow, somewhat contracted in the middle, then produced into 

 a long point, at either side of which is inserted the palpus, of three joints, with 

 the intermediate one very long, and the terminal minute and horny. The first 

 segment of the trunk is as broad as the head, above produced back- 

 wards, divided in the middle, so as to form an obtuse rounded collar ; the two fol- 

 lowing segments short ; the rest as long as the second and third of the thorax 

 conjointly, or even longer. The legs of moderate length, pretty stout, terminated 

 by a sharp claw. The third and fourth abdominal segments are furnished 

 beneath with a pair of strongly-developed tubercles, which are clothed at the end 

 with short, rigid hairs. The last segment is somewhat turgid above, and covers 

 the anus as with a sort of rim. The larva lives in old damp wood, in 

 which it bores passages running rather irregularly lengthwise, with side 

 galleries, and mostly filled with fibres of the wood and excrements. Vol- 

 lenhoven gave an account of a specimen of Canopus — perhaps the Fa- 

 brician obtectus — furnished with wings ; which fact seems to establish the 

 validity of the genus, in opposition to the surmises of some late writers 

 on the Hemiptera, that it was founded on larvae only. Verloven detailed 

 the results of some experiments, which prove unequivocally that the popular idea 

 expressed in the name of Termes puhatorius is correct, and that the ticking in 

 old wood is really produced by this insect, and not by Anobia alone, as some 

 authors have supposed — if, indeed, by the latter at all. Eyndhoven gave some 

 additional particulars of the structure of the larvae of Dytiscus marginali: and 

 Colymbetes striatus. Van der Wulp pointed out a difference of venation which 

 distinguishes Bibio leucoplerous Mg. from B. marci, for a variety of which Loew 

 was disposed to take it. The description of the female given here does not, how- 

 ever, agree perfectly with that by Mr. Haliday, at page 157 of the Entomological 

 Magazine, Vol. I. Some fresh instances are noticed of gregarious flights of 

 butterflies. Various additions to the Fauna of the Netherlands, in the Lepi- 

 doptera, Coleoptera, and Diptera, are recorded, and references given to Catalogues 

 of the indigenous species of the two latter orders respectively. 



BELGIUM. 



Memoires Couronnes de l'Academie Eoyale des Sciences de Belgique, etc. 



Prize Essays of the Koyal Belgian Academy of Sciences, etc. 4to. 



Brussels. 



Vol. XXVII. A.D. 1855, 1856. 



(Udekem) The development of Lumlricus terrestris ; with a comparative view 

 of that of Enchytreus, Tubifex rivulorum, Gheetogaster diaphanus, andNais pro- 

 boscidea; with three plates — p. 1-75. 



