92 EXTERNAL ANATOMY OP INSECTS. 



have no doubt that this is the true tongue. In Diptera it is 

 elongate and sharp-pointed, and is the part so named in Curtis's 

 figures of Anopheles and Tabanus. In Hymenoptera it is shorter, 

 but still evident, particularly in the bees, as Eucera, &c. In 

 Coleoptera, it is still less prominent, and assimilates to its 

 Lepidopterous form already described. In Orthoptera it 

 increases in size, and in the common cock-roach very nearly 

 approaches the shape, appearance, and relative size of the human 

 tongue. In Locusta it is very large. In Hemiptera the 

 tongue is the central and generally the shortest organ of the 

 mouth : it has not, however, escaped the lynx-eyed researches 

 of Savigny and Leon-Dufour. 



The next letter relates to the segments which bear the organs 

 of locomotion. 



I am, &c. 



Edward Newman. 



Deptford, March 1, 1833. 



P. S. — More than once, while this and the three remaining 

 letters have been waiting for publication, have I resolved on 

 suppressing them, and abandoning, to abler hands, the task I 

 have so rashly undertaken. As often has the kind, but I fear 

 ill-judged partiality of personal friends induced me to revise and 

 reserve them for publication. I too have reflected, that these 

 memoranda, trifling and imperfect as I know them to be, thrown 

 thus piece-meal into the great mass of human knowledge, would 

 not be altogether lost. The widow's mite was not unacceptable. 

 If each of us then does his best, let not his fellow-labourers judge 

 him too severely. Provided the continuation of this subject 

 proves to be against the judgment of your readers, I sincerely 

 hope they will express as much, and it shall be most cheer- 

 fully withdrawn. 



My name stands alone as the author of these letters ; 

 their production, however, is a joint concern, and my part is 

 by far the least meritorious. There is, I am sure, in human 

 nature, a tendency to commend the effort to do well. Ours 

 has been, and is, and — unless required to be suspended — shall 

 be, an effort to do well. If then a kind approving thought 

 occur to even one of your readers, let it be given exclusively 



