Idgia is a genus of beetles in the family Prionoceridae. They are distributed within the Old World tropics. These elongated beetles have soft elytra. Males have a comb on the inner edge of the distal tarsal segment of the foreleg.

Species that have been described in the genus include:

• I. abdominalis Pic, 1920
• I. abyssinica Champion, 1919
• I. amplipennis Pic, 1923
• I. andrewesi Bourgeois, 1907
• I. angustata Champion, 1919
• I. apicalis (Gerstacker, 1871)
• I. apicata Gorham, 1895
• I. arabica (Walker, 1871)
• I. ardesica Pic, 1908
• I. assimilis (Hope, 1831)
• I. asirensis Wittmer, 1980
• I. atricornis Pic, 1920
• I. bagorensis Pic, 1920
• I. bakeri Pic, 1920
• I. belli Gorham, 1895
• I. bimaculata Pic, 1910
• I. caeruliventris Champion, 1919
• I. cavilabris Champion, 1919
• I. chloroptera Redtenbacher, 1868
• I. cincta Pic, 1920
• I. confusa Pic, 1920
• I. costata Pic, 1920
• I. costulata Pic, 1941
• I. curticeps Pic, 1920
• I. cyanea Pic, 1906
• I. cyanocephala Champion, 1919
• I. cyanipennis Pic, 1920
• I. cyanura Champion, 1919
• I. dasytoides Champion, 1919
• I. decolor Champion, 1919
• I. deusta Fairmaire, 1878
• I. dichroa Champion, 1919
• I. dimelaena (Walker, 1859)
• I. dimidiata (Gerstacker, 1871)
• I. diversiceps Pic, 1925
• I. dohertyi Pic, 1912
• I. dubia Gyll., 1808
• I. elongaticeps Pic, 1923
• I. femorata Champion, 1919
• I. flavibuccis Bourgeois, 1892
• I. flavicollis Redtenbacher, 1878
• I. flavirostris Pascoe, 1860
• I. flavithorax Pic, 1927
• I. flavilabris Champion, 1919
• I. flavolimbata Champion, 1919
• I. foveifrons Fairmaire, 1900
• I. fruhstorferi Pic, 1920
• I. fulvicollis Reichenbach, 1849
• I. geniculata Champion, 1919
• I. gorhami Pic, 1911
• I. grandis Pic, 1935
• I. granulipennis Pic, 1920
• I. griseolineata Pic, 1934
• I. haemorrhoidalis Pic, 1906
• I. hoffmanni Gressitt, 1939
• I. huegeli (Redtenbacher, 1868)
• I. humeralifer Pic, 1920
• I. incerta Pic, 1920
• I. indicola Champion, 1919
• I. iriomoteana Nakane, 1980
• I. javana Champion, 1919
• I. laticornis Champion, 1919
• I. lineata Pic, 1920
• I. longicollis Pic, 1925
• I. longipalpis Champion, 1919
• I. longipes Pic, 1920
• I. longissima Pic, 1909
• I. luteipes Champion, 1919
• I. luzonica Pic, 1924
• I. melanocephala (Fabricius, 1781)
• I. maculicornis Pic, 1925
• I. maculiventris Champion, 1919
• I. maindroni Pic, 1909
• I. major Pic, 1908
• I. marginata Champion, 1919
• I. mindanaosa Pic, 1947
• I. melanura Kollar & Redtenbacher, 1844
• I. minuta Pic, 1920
• I. moupinensis Fairmaire, 1889
• I. nilgirica Champion, 1919
• I. nitida Champion, 1919
• I. obscurimembris Pic, 1923
• I. oculata Redtenbacher, 1868
• I. oedemeroides Pic, 1920
• I. opacipennis Pic, 1920
• I. pallidicolor Pic, 1906
• I. parlicularipes Pic, 1920
• I. particularicornis Pic, 1939
• I. plectrophora Champion, 1919
• I. revoili Pic, 1920
• I. rostrifera Champion, 1919
• I. rouyeri Pic, 1906
• I. semitecta Champion, 1919
• I. stamperi Pic, 1924
• I. subparallela Pic, 1920
• I. terminata Cast., 1840
• I. testaceipes Pic, 1908
• I. thibetana (Obenberger, 1918)
• I. uncigera Champion, 1919
• I. ungulata Champion, 1919
• I. varicornis Champion, 1919
• I. varipes Champion, 1919
• I. virescens Champion, 1919
• I. viridivittata Champion, 1919

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