Denshi Jisho — Online Japanese dictionary

moth
Noun 
がもく Lepidoptera
Noun 

You can also

Look up kanji details for 蛾 ひむし.

Try a Yahoo Jisho search for 蛾 ひむし .
Try a Goo Jisho search for 蛾 ひむし .
Try a Google search for 蛾 ひむし .