For an alphabetical list of insects in North America: http://www.insectidentification.org/insect-identification.asp Ones that start with "J" are: Japanese Beetle Japygid Dipluran Jerusalem Cricket Johnson Jumping Spider Jumping Bristletale For an alphabetical list of insects in the world: Good luck finding that, as there are over a million species of insects in the world.
Junebug
junebug
June Bug June Bug
Jackal, Jesus Lizard, June Bug
Japanese spider crab (yes, it's really an insect) Jeruselem cricket
An insect that starts with 's' is the scale bug and the stick insect.
WUTH-CA was created in 1979.
Jewel Beetle Jewelled Frog Beetle
ant aphid
an owlfly
Tapeworm
A fly