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How to tell Beetle Larva apart and pupaa


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So I am new to beetle keeping and this site. I have some larva, people think they are either Dynastes titylus or Xyloryctes jamaicensis. All photos of those 2 larva look very much alike. Also, the rhino beetles look a lot like Japanese beetle larva. Is there an easy way to tell these apart?

 

Also does anyone every ship/sell the beetle pupaa??

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No one has answered my query as to how to tell the larva apart - dynastes tityus, dynastes granti, Popillia japonica, or Xyloryctes jamaicensis apart? yes I meant the japanese beetle popillia, as it looks just like a very young dyanstes/xylorcytes.

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Cetonids will almost always crawl on their backs and they are a bit more rounded and thicker at the back end. We don't have any native cetonids that will come anywhere close to the size of our large Dynastinae larvae.

 

I put this together a while back, for basic comparison: http://bugguide.net/node/view/370049

 

Rhino larvae do not crawl on their backs.Now, between X.j. and D.t. - that would be a little more difficult : http://bugguide.net/node/view/1017533/bgimage

 

Basically, you should be ok unless someone sends you a box of mixed larvae from around the US

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I still do not see a difference between X.J and D.T. Is it the big spots,little spots, or the black head & mouth parts?

 

By the way I found these 2 larva so thats why its bewteen X.J. and D.T.

 

Easiest way to tell them apart is to look at the first three segments behind the head capsule. Xyloryctes larvae lack dense setae that are present in tityus, making them look more smooth compare to tityus.

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So I looked at the 3 segments behind head capsule. There is setae on the 1st segment,but not the 2nd or 3rd, then setae starts again. All the setae on the entire body are of the same length and thickness.

 

Ya...they have somewhat long setae on the 1st segment, but they aren't "dense" as in tityus.

 

Compare :

 

D. tityus

http://bugoftheweek.com/blog/2013/1/7/hercules-hercules-beetle-idynastes-tityusi-missing-link-and-video

 

X. jamaicensis

http://bugguide.net/node/view/1062299/bgimage

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