86 ENTOMOLOGISK TIDSKRIFT 1894. 



investigations on its affinities, undertaken »depuis que cette notice 

 a été mise sous presse», pronounces: »Nous avons été conduit 

 à envisager cet être comme constituant un type à part qu'on aura 

 probablement à séparer de la classe des insectes. » 



Meinert (in the note indicated above p. 66) has not seen 

 any specimen of the Hemimertis; therefore is taking it for granted 

 that Saussure's description and figures of the mouth-organs are 

 correct, but finds that his conclusion: a new order of Insects or 

 a new sub- class of Arthropods, is not justified. He advances the 

 opinion that in the Orthoptera the labium is the 4th pair of 

 mouth limbs, while the 3rd pair is not developed in the earlier 

 known Insects, but the mouth-part, from which it should originate, 

 is believed ta be the »ßdie (egentlig förste) Metamer, som skulde 

 svare til de övrige Insecters Underlaebe .... Orthopterernes saa- 

 kalde Tunge (lingua), som i Almindelighed betragtes som en 

 Deel af eller hele Hypopharynx» (p. 344), and which just in 

 Heininieriis should be furnished with the »limbs (palpi)» figured 

 by Saussure. That I do not agree with Meinert as to the grea- 

 test part of these theories will be seen from the following. He 

 concludes the note with these woords: »Efter sin Form og Habitus 

 er Heniinienis nu nasrmest en Orthopter, men efter sin Mund- 

 bygning en Thysanur; efter min Opfattelse staaer den som en 

 Mellemform mellem disse to nœrbeslœgtede Ordener, men til at 

 danne en egen Orden, synes den mig dog for lidet udmasrket. » 



In the aboved quoted preliminary note in »Zoolog. Anzeiger» 

 I have produced an interpretation, new in most of the main-points, 

 of the mouth-organs of the Insects, and I have used this in the 

 above description. Here I shall quote but the following main- 

 points. The labium of Insects is homologous with the maxillipeds 

 f. inst. in Isopoda and AinpJiipoda, the maxillae of Insects with 

 the 2nd pair of maxiUîe in Crustacea, the hypopharynx in Insects 

 (developed as a free organ in TJiysaniira, Orthoptera and Dip- 

 tera) is homologous with the »paragjtatha-n of Crustacea, while 

 the maxillulcG (ist pair of maxillae) in Ci'iistacea are rather well 

 developed in most of the TJiysanura (but very differently inter- 

 preted by the different authors) and are also found as lateral lobes 

 at the basis of the hypopharynx in several Orthoptera. Further 

 I have studied the more special composition of the maxillulae, 



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