We present an annotated checklist of 238 species of water mites found in the Himalayan and Tien Shan Mountain ranges. The checklist is based on published records and the available data collected from bibliography on water mites of the two mountain regions covering eight countries i.e., Bhutan, China, India, Kazakhstan, Kyrgyzstan, Myanmar, Nepal, and Tajikistan. Moreover, recent new material has been collected in Kyrgyzstan and Bhutan. Atractides species are more dominant in the Himalayas than in the Tien Shan Mountain. In contrast, Lebertia and Sperchon species are predominant in the Tien Shan Mountain but not in the Himalayas. Interestingly Torrenticola and Monatractides are very scanty in the Tien Shan Mountains but common in the Himalayan streams.

An annotated distributional checklist of the Coccinellidae of Bhutan is presented, enumerating 91 species, 17 of which are here recorded for the first time: to be removed from the list.Nine species and two subspecies are hitherto only reported from the territory of Bhutan. The Bhutanese coccinellid fauna is still insufficiently known.

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New records of 43 species of dragonflies and damselflies from Trongsa and Zhemgang districts in central Bhutan are provided. Two of these, Watanabeopetalia atkinsoni (Selys, 1878) and Tetrathemis platyptera (Selys, 1878), are new to Bhutan bringing the number of species known from Bhutan to 125. A checklist of the 60 species known from Trongsa district, Zhemgang district and the Jigme Singye Wangchuck National Park is provided.

This checklist covers each of the 73 social and solitary wasps of the family Vespidae currently known from Bhutan. Of these, 11 species in the subfamily Eumeninae, five species in Polistinae and one species in Vespinae are reported as new records for the country.