Description of the larva of Hämäläinen, 2003 (Odonata, Platycnemididae), with a key to the larvae of the subfamily Platycnemidinae from the Sino-Japanese and Oriental regions.

The final instar larva of the rare species Hämäläinen, 2003 is described and illustrated here for the first time, including a new distribution record from Vietnam. The larva of differs from that of congeneric species by distinct morphological features, including the presence of four setae on the palpal lobe of the labium, the presence of lateral spines on abdominal S5-9, and a long terminal filament on the caudal lamella. We also provide a key to species for the known larvae of the subfamily Platycnemidinae in the Sino-Japanese and Oriental regions.

Description of the final stadium larva of Cryptophaea vietnamensis (van Tol & Rozendaal, 1995) (Odonata: Euphaeidae) from Vietnam.

The final stadium larva of the Cryptophaea vietnamensis (van Tol & Rozendaal, 1995) from Vietnam is described and illustrated based on specimens reared to adulthood. This is the first record of a larva of the genus Cryptophaea Hämäläinen, 2003. The larvae of C.

First record of the genera Pseudoloxopidea Yasunaga, 1999 and Pseudoloxops Kirkaldy, 1905 (Hemiptera: Heteroptera: Miridae) from Vietnam.

The orthotyline plant bug genera Pseudoloxopidea Yasunaga, 1999 and Pseudoloxops Kirkaldy, 1905 are reported from Vietnam for the first time based on the discovery of two new species Pseudoloxopidea ruberuniformis sp. nov. and Pseudoloxops clavolineatus sp.

Description of final stadium larva of Dysphaea gloriosa Fraser, 1938, (Odonata: Euphaeidae) with notes on its habitat and biology.

The final instar larva of the genus Dysphaea Selys, 1853 is described and figured for the first time based on specimens of D. gloriosa Fraser, 1938 from Khao Yai National Park, Thailand. The larvae of D.

Description of Protosticta samtsensis sp. nov. (Odonata: Zygoptera: Platystictidae) from Samtse district, Bhutan.

Protosticta samtsensis sp. nov. (holotype : Bhutan, Samtse District, Norgaygang gewog (Bara), 27.

First descriptions of the final stadium larva of Heliogomphus chaoi Karube, 2004 and the adult female of Microgomphus jurzitzai Karube, 2000 from Vietnam (Odonata: Gomphidae).

The larva of Heliogomphus chaoi Karube, 2004 and the adult female of Microgomphus jurzitzai Karube, 2000 are described from Vietnam for the first time. The morphological difference between the larvae of the genera Heliogomphus Laidlaw, 1922 and Microgomphus Selys, 1858 are discussed, which throws doubts about the current taxonomic status of H. retroflexus (Ris, 1912).

Description of the larva of Indocnemis orang (Frster in Laidlaw, 1907) (Odonata: Platycnemididae: Calicnemiinae) from Thailand, with larval key to the known genera of the family Platycnemididae in Asia.

The larval characters of the genus Indocnemis Laidlaw, 1917 are described based on larval specimens of I. orang (Frster in Laidlaw, 1907) from Thailand. The larvae are characterized by 56 pairs of premental setae, 89 palpal setae of the same length, and vertical lamella caudal gills.

The genus Planaeschna McLachlan, 1895 and its subgroupings in Vietnam, with descriptions of three new species (Odonata: Aeshnidae).

Twelve Planaeschna McLachlan, 1895 species recorded in Vietnam are presented and their subgroupings based on nuclear DNA analysis are discussed. Three new species are described (Planaeschna crux sp. nov.

A review of the Drepanosticta carmichaeli-group, with the description of D. wildermuthi sp. nov. from the Central Highlands of Vietnam (Odonata: Zygoptera: Platystictidae).

A modified and expanded definition of the Drepanosticta carmichaeli-group is given. This includes the species: D. annandalei Fraser, 1924, D.

Description of Chlorogomphus danhkyi sp. nov. from Vu Quang National Park, central Vietnam with notes on other congeners from the Park (Odonata: Chlorogomphidae).

Chlorogomphus danhkyi sp. nov. (Holotype ♂: Khe Ro, Vu Quang National Park, Ha Tinh Province, 15.

Description of Coeliccia natgeo sp. nov. from Central Vietnam with keys to the males and females of the hayashii-group (Odonata: Zygoptera: Platycnemididae).

Coeliccia natgeo sp. nov. is described from central Vietnam (holotype ♂, 18.

Description of Coeliccia lephuocdieui sp. nov. from the Central Highlands of Vietnam (Odonata: Zygoptera: Platycnemididae) with notes on its congeners.

Coeliccia lephuocdieui sp. nov. (holotype ♂, 14.

Protosticta joepani sp. nov. from Borneo with notes on P. kinabaluensis Laidlaw, 1915 (Odonata: Zygoptera: Platystictidae).

Protosticta joepani sp. nov. is described from Malaysian Borneo (holotype male Bario, Kelabit Highlands, Miri Division, Sarawak, Malaysia, deposited in the Naturalis Biodiversity Center, Leiden).

First record of Indolestes cyaneus (Selys, 1862) from Vietnam and notes on its color variation (Odonata: Zygoptera: Lestidae).

First record of Indolestes cyaneus (Selys, 1862) from Vietnam with providing illustrations of its detailed structures, as well as notes on the coloration of the populations from Taiwan, Nepal and India.

Coeliccia lecongcoi sp. nov., a new damselfly from the Central Highlands of Vietnam (Odonata: Zygoptera: Platycnemididae).

Coeliccia lecongcoi sp. nov. (holotype ♂, 15.

Notes on the genus Laidlaw, 1917 in Vietnam with description of sp. n. (Odonata, Zygoptera, Platycnemididae).

(holotype ♂, 12°07'10.0"N, 108°5'51.0"E, 1503 m a.

Drepanosticta emtrai sp. nov. from Vietnam with a discussion of Drepanosticta vietnamica Asahina, 1997 (Odonata: Zygoptera: Platystictidae).

Drepanosticta emtrai sp. nov. is described from Vietnam (holotype male Ha Tinh Province, 9 vi 2015, to be deposited in RMNH).

A synopsis of the Euphaeidae (Odonata: Zygoptera) of Vietnam, with descriptions of two new species of Euphaea.

23 species of Euphaeidae (Odonata: Zygoptera) are reported from Vietnam including two new species of Euphaea, E. saola Phan Hayashi, sp. nov.

Description of sp. nov. (Odonata: Zygoptera: Platycnemididae) from central Vietnam.

Coeliccia bhriulieci sp. nov. (holotype male from Tay Giang district, Quang Nam province, central Vietnam, deposited in the Zoological collection of the Southern Institute of Ecology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam) is described based on male specimens.

spec. nov. from Central Vietnam (Odonata: Platycnemididae).

Coeliccia mientrung spec. nov. is described from central Vietnam.

Description of two new from Vietnam and central Laos with notes on their congeners in Vietnam (Odonata: Platycnemididae).

Descriptions are given of two new species of Calicnemia: C. akahara sp. nov.

Description of two new species of from Vietnam (Odonata: Platycnemididae).

Coeliccia hayashii sp. nov. (holotype male, from Doi waterfall, KaNat, K'Bang district, Gia Lai Province, central Vietnam, deposited in VNMN) and Coeliccia mattii sp.

A study of the genus Protosticta Selys, 1855, with descriptions of four new species from Vietnam (Odonata: Platystictidae).

The genus Protosticta Selys, 1855 from Vietnam is revised. Four new species, P. ngoai spec.