Ants, bees, and wasps : a record of observations on the habits of the social Hymenoptera . p. 366. * Thieretimmen, p. 132. 230 STRmULATING APPARATUS we consider that the friction of the collar against themesothorax may also assist in doing so. Under these circumstances, Landois asked himselfwhether other genera allied to Mutilla might notpossess a similar organ, and also have the power of pro-ducing sound. He first examined the genus Ponera,which, in the structure of its abdomen, nearly resem-bles Mutilla, and here also he found a fully developedstridulating apparatus. He then turned to the tr
Ants, bees, and wasps : a record of observations on the habits of the social Hymenoptera . p. 366. * Thieretimmen, p. 132. 230 STRmULATING APPARATUS we consider that the friction of the collar against themesothorax may also assist in doing so. Under these circumstances, Landois asked himselfwhether other genera allied to Mutilla might notpossess a similar organ, and also have the power of pro-ducing sound. He first examined the genus Ponera,which, in the structure of its abdomen, nearly resem-bles Mutilla, and here also he found a fully developedstridulating apparatus. He then turned to the true ants,^ and here also hefound a similar rasp-like organ in the same is indeed true that ants produce no sounds whichare audible by us; still, when we find that certainallied insects do produce sounds appreciable to us byrubbing the abdominal segments one over the other;and when we find, in some ants, a nearly similaistructure, it certainly seems not unreasonable toconclude that these latter also do produce sounds,even though we cannot hear them. Landois describes Fig. Attachment of abdominal segments of Letnut Hnmt $ x 226 the structure in the workers of Lasius fuliginosus athaving 20 ribs in a breadth of 0*13 of a millimetre, Some tropical nnts are said to Dtodnce a chirping sound. ON ABDOMINAL SEGMENTS. 231 but he gives no figure. In Fig. 8 I have representedthe junction of the second and third abdominal seg-ments in Lasius fiavus, x 225, as shown in a longi-tudinal and vertical section. There are about tenwell-marked ribs (r), occupying a length of approxi-mately -Ywu of ^^ inch. Similar ridges also occurbetween the following segments. In connection with the sense of hearing I may men-tion another very interesting structure. In the year1844, Von Siebold described * a remarkable organ whichhe had discovered in the tibiae of the front legs ofGryllv^, and which he considered to serve for the pur-pose of hearing. These organs have been also studiedby Biu-meist
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectbees, bookyear1915
