Glowing Grub/Caterpillar? Please ID?

[Doug Yanega]

>Hello, we live in SE Wisconsin, USA. Last night we found a grub or
>caterpillar which had rows of phosphorescent green dots down its back. The
>insect was in the grass, about four feet away from a Maple tree.
>
>Viewed under a flashlight, the insect appeared to be a "plain," tan-colored
>grub about 1.5" long.
>
>This was not a "glow worm" - it was much larger and fatter.

It was a glow worm, family Phengodidae. There are some species which 
are large and fat, about 1.5" long.

Peace,
-- 

Doug Yanega        Dept. of Entomology         Entomology Research Museum
Univ. of California - Riverside, Riverside, CA 92521
phone: (909) 787-4315 (standard disclaimer: opinions are mine, not UCR's)
            http://entmuseum9.ucr.edu/staff/yanega.html
   "There are some enterprises in which a careful disorderliness
         is the true method" - Herman Melville, Moby Dick, Chap. 82

 
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