user16460: While trying to tag this question which essentially asks for possible arthropods laying such stalked eggs I found two tags arthropod and entomology. 
Three questions are tagged arthropod and there are 467 questions with tag entomology. 
I did a surface browsing and found some millipede questions (Non-insects) tagged entomology (study of Insecta) and not Arthropod. I have a feeling that there may be general questions about arthropods too that have the entomology tag because the term insect is loosely used to mean 'any insect or insect like invertebrate.' (Dictionary)
I wonder if I should edit arthropod into Arthropodology and then the tag can be useful for tagging questions that are in general about arthropods and questions about Carcinology (the study of crustaceans) and Myriapodology (the study of centipedes, millipedes, and other myriapods) as we don't have tags for these subfields yet. 
If there's no counter-argument in a week I will rename the arthropod tag and also elaborate the entomology tag.

user16460: After a couple of edits which was initiated by another 'Homo sapiens' the two tags stand like this now :

arthropod
entomology


user25568: Though arthropod and arthropodology are grammatically not same; as a "tag"  the both ( i.e. tag arthropod and tag arthropodology) the both will work same. 
Now if someone do not use the arthropod tag for a non-insect arthropod, instead choose the wrong tag entomology (that should be used for insects, ie a subgroup of arthropod) only, the problem is not of the tag. It is the users' ignorance. (however the ignorance is no wrong... no-one of us is omniscient)
Though using the term "arthropodology" may be one solution (because along with  entomology; another word ending with "logy" would declare "I am another logy; I am not exactly same as entomology"). But people can still do the same mistake, because entomology is a fairly common English word (even often appear in daily newspaper), and there could be peoples who have listen about "entomology deals with various bugs" but not familiar with difference of entomology (and insect) with arthropodology (and arthropods). 
The best way to recover it; is whenever we found such wrongly-labelled question, where a non-insect arthropod has been labelled with entomology;  we need to edit/ suggest-edit to replace the tag with arthropod, with a comment that why the edit has been done. (A sample as follows): 

Entomology means the study about insects, a sub-group of arthropods only. Since the above question is about an arthropod but not an insect; a more general tag arthropod has been suggested. 

Sample Template: 

Entomology means the study about [insects](https://en.wikipedia.org/wiki/Insect), a sub-group of [arthropods](https://en.wikipedia.org/wiki/Arthropod) only. Since the above question is about an arthropod but not an insect; a more general tag [tag:arthropod] has been suggested.

Once the users become aware about this problem (and also while browsing through  collection of properly-labelled question people will become more aware about labelling correctly)

16460: <p>While trying to tag <a href="https://biology.stackexchange.com/questions/58192/what-are-these-eggs-location-india">this</a> question which essentially asks for possible arthropods laying such stalked eggs I found two tags <a href="https://biology.stackexchange.com/questions/tagged/arthropod" class="post-tag" title="show questions tagged &#39;arthropod&#39;" rel="tag">arthropod</a> and <a href="https://biology.stackexchange.com/questions/tagged/entomology" class="post-tag" title="show questions tagged &#39;entomology&#39;" rel="tag">entomology</a>. </p>

<p>Three questions are tagged <a href="https://biology.stackexchange.com/questions/tagged/arthropod" class="post-tag" title="show questions tagged &#39;arthropod&#39;" rel="tag">arthropod</a> and there are 467 questions with tag <a href="https://biology.stackexchange.com/questions/tagged/entomology" class="post-tag" title="show questions tagged &#39;entomology&#39;" rel="tag">entomology</a>. </p>

<p>I did a surface browsing and found some <a href="https://biology.stackexchange.com/search?q=%5Bentomology%5D%20millipede">millipede questions</a> (Non-insects) tagged entomology (study of Insecta) and not Arthropod. I have a feeling that there may be general questions about arthropods too that have the entomology tag because the term <em>insect</em> is loosely used to mean <em>'any insect or insect like invertebrate.'</em> <sub><a href="http://www.dictionary.com/browse/bug" rel="nofollow noreferrer">(Dictionary)</a></sub></p>

<p>I wonder if I should edit <a href="https://biology.stackexchange.com/questions/tagged/arthropod" class="post-tag" title="show questions tagged &#39;arthropod&#39;" rel="tag">arthropod</a> into <a href="https://en.wikipedia.org/wiki/Arthropodology" rel="nofollow noreferrer">Arthropodology</a> and then the tag can be useful for tagging questions that are in general about arthropods and questions about Carcinology (the study of crustaceans) and Myriapodology (the study of centipedes, millipedes, and other myriapods) as we don't have tags for these subfields yet. </p>

<p>If there's no counter-argument in a week I will rename the arthropod tag and also elaborate the entomology tag.</p>
 16460: <p>After a couple of edits which was initiated by <a href="https://biology.stackexchange.com/users/19099/another-homo-sapien">another 'Homo sapiens'</a> the two tags stand like this now :</p>

<ul>
<li><p><a href="https://biology.stackexchange.com/questions/tagged/arthropod" class="post-tag" title="show questions tagged &#39;arthropod&#39;" rel="tag">arthropod</a></p></li>
<li><p><a href="https://biology.stackexchange.com/questions/tagged/entomology" class="post-tag" title="show questions tagged &#39;entomology&#39;" rel="tag">entomology</a></p></li>
</ul>
 25568: <p>Though arthropod and arthropodology are grammatically not same; as a "tag"  the both ( i.e. tag <a href="https://biology.stackexchange.com/questions/tagged/arthropod" class="post-tag" title="show questions tagged &#39;arthropod&#39;" rel="tag">arthropod</a> and tag <a href="https://biology.stackexchange.com/questions/tagged/arthropodology" class="post-tag" title="show questions tagged &#39;arthropodology&#39;" rel="tag">arthropodology</a>) the both will work same. </p>

<p>Now if someone do not use the <a href="https://biology.stackexchange.com/questions/tagged/arthropod" class="post-tag" title="show questions tagged &#39;arthropod&#39;" rel="tag">arthropod</a> tag for a non-insect arthropod, instead choose the wrong tag <a href="https://biology.stackexchange.com/questions/tagged/entomology" class="post-tag" title="show questions tagged &#39;entomology&#39;" rel="tag">entomology</a> (that should be used for insects, ie a subgroup of arthropod) only, the problem is not of the tag. It is the users' ignorance. (however the ignorance is no wrong... no-one of us is omniscient)</p>

<p>Though using the term "arthropodology" may be one solution (because along with  entomology; another word ending with "logy" would declare "I am another logy; I am not exactly same as entomology"). But people can still do the same mistake, because entomology is a fairly common English word (even often appear in daily newspaper), and there could be peoples who have listen about "entomology deals with various bugs" but not familiar with difference of entomology (and insect) with arthropodology (and arthropods). </p>

<p>The best way to recover it; is whenever we found such wrongly-labelled question, where a non-insect arthropod has been labelled with <a href="https://biology.stackexchange.com/questions/tagged/entomology" class="post-tag" title="show questions tagged &#39;entomology&#39;" rel="tag">entomology</a>;  we need to edit/ suggest-edit to replace the tag with <a href="https://biology.stackexchange.com/questions/tagged/arthropod" class="post-tag" title="show questions tagged &#39;arthropod&#39;" rel="tag">arthropod</a>, with a comment that why the edit has been done. (A sample as follows): </p>

<blockquote>
  <p>Entomology means the study about <a href="https://en.wikipedia.org/wiki/Insect" rel="nofollow noreferrer">insects</a>, a sub-group of <a href="https://en.wikipedia.org/wiki/Arthropod" rel="nofollow noreferrer">arthropods</a> only. Since the above question is about an arthropod but not an insect; a more general tag <a href="https://biology.stackexchange.com/questions/tagged/arthropod" class="post-tag" title="show questions tagged &#39;arthropod&#39;" rel="tag">arthropod</a> has been suggested. </p>
</blockquote>

<p>Sample Template: </p>

<blockquote>
  <p><code>Entomology means the study about [insects](https://en.wikipedia.org/wiki/Insect), a sub-group of [arthropods](https://en.wikipedia.org/wiki/Arthropod) only. Since the above question is about an arthropod but not an insect; a more general tag [tag:arthropod] has been suggested.</code></p>
</blockquote>

<p>Once the users become aware about this problem (and also while browsing through  collection of properly-labelled question people will become more aware about labelling correctly)</p>
