Environmental Engineering Reference
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Subfamily: Laccophilinae
7 . Laccophilus clarki (Sharp)
8 . Laccophilus ellipticus (Regimbart)
9 . Laccophilus uniformis (Motsch)
Subfamily: Dytiscinae
10. Cybister (Melanectes) tripunctatus asiaticus
Sharp
11. Cybister (Melanectes) convexus (Sharp)
12. Eretes sticticus (Linnaeus)
13. Hydaticus (Guignotites) vittatus (F.)
14. Rhantaticus congestus (Klug)
15. Sandracottus dejeani (Aube)
II. Family: Gyrinidae
Subfamily: Enhydrinae
16. Dineutus (Protodineutus) indicus (Aube)
Subfamily: Gyrininae
17. Gyrinus convexiusculus (Macleay)
Subfamily: Orechtochilinae
18. Orectochilus (Patrus) semivestitus (Guerin)
19. Orectochilus (Patrus) discifer (Walker)
III. Family: Hydrophilidae
Subfamily: Hydrophilinae
20. Hydrophilus olivaceous (F.)
21. Regimbartia attenuate (Fabricius)
22. Helochares anchoralis (Sharp)
23. Berosus indicus (Mots.)
24. Berosus pulchellus (Macleay)
Subfamily: Hydrochinae
25. Hydrochus bindosus (Mots)
Subfamily: Sphaeridiinae
26. Dactylosternum abdominale (F.)
27. Sphaeridium dimidiatum (Gory)
IV. Family: Haliplidae
28. Haliplus angustifrons (Regimbart)
29. Haliplus
pared to the large orders Coleoptera and
Hemiptera. Insect collections were made from
various surveys to the different lakes in and
around Hyderabad, during April, 2008, to
December, 2012. The study reports the presence
of 14 species of aquatic Hemiptera belonging to
5 families and 31 species of aquatic Coleoptera
under fi ve families. Many aquatic species are
included in aquatic Hemiptera, but only species
from fi ve families, Belostomatidae, Nepidae,
Corixidae, Notonectidae and Gerridae, are
reported from the lakes of Hyderabad. Aquatic
Coleoptera are highly diverse and distributed,
but only fi ve families, namely, Dytiscidae,
Gyrinidae, Hydrophilidae, Haliplidae and
Elmidae, are chiefl y represented in the present
report from the lakes of Hyderabad. The diver-
sity of insect fauna in the different wetland types
varied widely which was dependent on the avail-
ability of macrophytes and general physico-
chemical conditions of water. It is presumed that
further intensive seasonal surveys to many more
wetlands belonging to different types and
detailed taxonomic studies may reveal some spe-
cies which may be signifi cant both ecologically
and taxonomically. Further studies aiming to
improve our knowledge on water bugs and bee-
tles should focus on collecting in little known
areas, revision of the still unstudied material
from additional families and fi lling the large
gaps in our knowledge regarding the diversity of
water beetles in some specifi c habitats.
Acknowledgements The author is thankful to Dr.
K. Venkataraman, Director, Zoological Survey of India,
Kolkata, and Dr. D.V. Rao, Offi cer-in-Charge, Zoological
Survey of India, Hyderabad, for providing facilities to
carry out this work. I sincerely thank Shri.
C. Radhakrishnan, Additional Director (Retd.), Zoological
Survey of India, Calicut, for providing valuable input,
keen interest and encouragement. My sincere thanks are
also due to late Dr. Thirumalai and Dr. Animesh Bal and
Dr. Kailash Chandra, Additional Directors, Zoological
Survey of India, Kolkata, and Dr. Jach Manfred,
Entomologist, Natural History Museum, Vienna, Austria,
for providing literature and scientifi c assistance. Thanks
are also due to Dr. S.V.A. Chandrasekar, Scientist, for
encouragement and lucid suggestions and Mr. Anand and
Mr. K. Pande for technical assistance.
( Liaphlus )
pulchellus indicus
(Regimbart)
V. Family: Elmidae
30. Stenelmis ssp., (Dufour)
Conclusion
Although all species of Plecoptera,
Ephemeroptera, Odonata and Trichoptera have
aquatic stages, these are relatively small and
have little numerical signifi cance when com-
 
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