【龙虱科】
龙虱科（Dytiscidae），亦作龙虱科，为水甲虫的一种，隶属于鞘翅目之下的肉食亚目。生活在田野、水沟、小溪等水体中，是一种掠食性水生昆虫。其学名源于希腊文δυτικός（dytikos），意思就是「肉食性的潜水甲虫」。本科物种几乎见于全世界所有淡水栖境，但亦有部分于落叶堆中栖息Foster2014。成虫体长一般在1之间，尽管物种间的差异会比较大。当中见于欧洲的及巴西的有最大的体型，可分别长至1到1。与之相反，拥有最小体型的物种应当为栖息于澳大利亚地下水中的 atypicali，只有约abbr=on长。
大多数物种的颜色都在深棕色、黑色或深橄榄绿，某些亚科的物种会在其边沿带有金黄色的条状斑纹。
==食用==
本科物种的成虫，特别是Cybister属的物种，均为可食用昆虫。在美国内华达州洪堡干湖的一个山洞内，还在当地史前人类遗下的粪化石内发现有被食用的残骸。在墨西哥，他们在吃C. explanatus时会以墨西哥夹饼夹着来吃。在日本多个地区（例如：长野县）有以日本龙虱（Cybister japonicus）为食的习惯；在中华人民共和国广东省，除了日本龙虱以外，亦会食用C. bengalensis、C. guerini、C. limbatus、C. sugillatus、C. tripunctatus等物种。D. marginalis很可能也包括在内，但这个物种的肉很少。也有报告指在台湾、泰国及新几内亚亦有食用本科物种的习惯。
一只详细分类未明的本科物种
大但在陆地上很慢，成年后也不是特别凶猛，它们也被许多中型鸟类、哺乳动物和其他大型捕食者津津乐道地吃掉。幼虫通常比较安全，由于它们的保护色和通过水柱逃跑的能力；它们可能相当难抓，可能成为小池塘的顶级掠食者。
==系统分类==
本科包括下列各属：
* Acilius Leach, 1817
*  Sharp, 1882
*  Biström, 1988
*  Guignot, 1948
*  Crotch, 1873
* 豆龙虱属 Agabus Leach, 1817
*  Sharp, 1882
*  Zimmermann, 1921
*  Sharp, 1882
* Agnoshydrus Biström, Nilsson & Wewalka, 1997
*  Guignot, 1953
*  Mouchamps, 1964
* 彩斑龙虱属 Allopachria Zimmermann, 1924
*  Régimbart, 1900
*  Sharp, 1882
*  Guéorguiev, 1971
*  Wewalka, Balke & Hendrich, 2001
*  Brinck, 1943
*  Babington, 1841
*  Sharp, 1882
*  Watts, 1978
*  Watts, 1978
*  Lea, 1927
*  Clark, 1863
*  Régimbart, 1900
*  Régimbart, 1895
*  Sharp, 1882
*  Balke, Hendrich, Mazzoldi & Biström, 2002
*  Zimmermann, 1919
*  Spangler, 1972
*  K.B.Miller & Lubkin, 2001
*  Zimmermann, 1919
*  Turner & Bilton, 2015
*  Balke, Hendrich & Wewalka, 1992
*  Watts, 1978
*  Aubé, 1837
*  Sharp, 1882
*  Régimbart, 1894
*  Sharp, 1882
*  Clairville, 1806
*  Spangler & Barr, 1995
*  Erichson, 1832
*  Say, 1830
*  Ponomarenko, 1977
*  K.B.Miller, 1997
* Cybister Curtis, 1827
*  Sharp, 1882
*  Sharp, 1882
*  Sharp, 1882
*  Babington, 1841
*  Uéno, 1996
*  Linnaeus, 1758
*  Laporte, 1833
*  Brancucci, 1979
*  Watts, 1978
*  Wewalka & Biström, 1998
*  Dejean, 1833
*  Seidlitz, 1887
*  Young & Longley, 1976
*  Zimmermann, 1921
*  Guignot, 1950
*  Sharp, 1882
*  Fairmaire, 1869
*  Strand, 1935
*  Fall, 1927
*  Biström, 1982
*  Sharp, 1882
*  Leach, 1817
*  Hope, 1838
*  Roughley & Larson, 2000
*  J.Balfour-Browne, 1953
*  K.B.Miller, 2001
*  Motschulsky, 1853
*  Jakovlev, 1897
*  Sharp, 1882
*  Clairville, 1806
*  Sharp, 1882
*  Motschulsky, 1853
*  Stephens, 1828
*  Sharp, 1882
*  Wewalka & Biström, 1994
*  Illiger, 1802
*  Guignot, 1939
*  Castro & Delgado, 2001
*  Crotch, 1873
*  Erichson, 1832
*  Satô, 1972
*  Watts & Humphreys, 1999
*  Ordish, 1976
*  Régimbart, 1895
*  Motschulsky, 1855
*  Leach, 1815
*  J.Balfour-Browne, 1939
*  Roughley & Wolfe, 1987
*  Gozis, 1914
*  Brancucci, 1983
*  Sharp, 1882
*  Guignot, 1936
*  Sharp, 1882
*  Guignot, 1939
*  Guignot, 1939
*  Guignot, 1950
*  Dejean, 1833
*  Aubé, 1836
*  Sharp, 1882
*  Brinck, 1943
*  Laporte, 1835
*  Seidlitz, 1887
*  Guignot, 1945
*  Sharp, 1882
*  Young, 1967
*  J.Balfour-Browne, 1946
*  K.B.Miller, 2002
*  Wickham, 1911
*  Uéno, 1957
*  Steiner, 1981
*  Régimbart, 1906
*  W.J. Macleay, 1871
*  Young, 1967
*  Young, 1967
*  Guignot, 1931
*  J.Balfour-Browne, 1943
*  Sharp, 1882
*  Watts & Humphreys, 2001
*  Zimmermann, 1928
*  Schaum & White, 1847
*  Seidlitz, 1887
*  Sharp, 1882
*  Régimbart, 1903
*  Ponomarenko, 1987
*  Balke, 2001
*  Balke, 1998
*  Sharp, 1882
*  Guignot, 1942
*  Guignot, 1937
*  Guignot, 1937
*  J.Balfour-Browne, 1939
*  Ordish, 1976
*  Thomson, 1859
*  Biström, 1988
*  Régimbart, 1879
*  Guignot, 1945
*  Sharp, 1882
*  Théobald, 1937
*  Sharp, 1882
*  Biström, 1988
*  Guignot, 1933
*  Sharp, 1882
*  Chatanay, 1911
*  Sharp, 1882
*  Dejean, 1833
*  Bameul, 1989
*  García, 2001
*  Sharp, 1882
*  Franciscolo, 1979
*  Gozis, 1914
*  Palmer, 1957
*  Watts, 1997
*  Brinck, 1948
*  Omer-Cooper, 1958
*  Spangler, 1996
*  Abeille de Perrin, 1904
*  Spangler, 1996
*  Sharp, 1882
*  Brinck, 1945
*  Sharp, 1882
*  Brinck, 1943
*  Zimmermann, 1919
*  Larson & LaBonte, 1994
*  Gozis, 1914
*  Spangler, 1981
*  Watts, 1982
*  Dejean, 1833
*  Omer-Cooper, 1956
*  Watts, 1985
*  Guignot, 1941
*  Sanfilippo, 1958
*  Sharp, 1882
*  Brancucci, 1985
*  Guignot, 1939
*  Aubé, 1837
*  Gozis, 1886
*  Guignot, 1936
==参考文献==
* aut|联邦科学与工业研究组织 (CSIRO) (2004): Water for a Healthy Country -  Family Dytiscidae date=20210224213843 . Version of 2004-JUL-02. Retrieved 2008-AUG-04
* De Foliart, Gene R. (2002):  Chapter 26 - Eastern Asia: China, Japan, and other countries. In: The Human Use of Insects as a Food Resource:  A Bibliographic Account in Progress.
* Jäch, Manfred A. (2003): Fried water beetles Cantonese style. American Entomologist 49(1): 34-37.  PDF fulltext
* Larson, D.J., Alarie, Y.,  and  Roughley, R.E. (2000): Predaceous Diving Beetles (Coleoptera: Dytiscidae) of the Nearctic Region, with emphasis on the fauna of Canada and Alaska. NRC Research Press, Ottawa. 978-0-660-17967-4.
==外部连结==
*Dytiscidae
* language=en
*  联邦科学与工业研究组织「家庭龙虱」 date=20210224213843
分类:可食用昆虫