ON A COLLECTION OF ODONATA FROM MANIPUR WITH NEW RECORDS

Manipur state of the Indian Union is situated on the Indo-Burma frontier. The state is mostly covered with hill ranges having an average altitude of 200 M, surrounding a large central basin. Present study is based on a fairly good collection of odonata from the state present in the Eastern Regional Station, Zoological Survey of India, made in two successive years 1974 and 1975. Collection localities are mostly aiound Loktak lake in the south-east corner of the central basin and in the hilly regions further south around Churachandpur and Singant.


INTRODUCTION
Manipur state of the Indian Union is situated on the Indo-Burma frontier.The state is mostly covered with hill ranges having an average altitude of 200 M, surrounding a large central basin.Present study is based on a fairly good collection of odonata from the state present in the Eastern Regional Station, Zoological Survey of India, made in two successive years 1974 and 1975.Collection localities are mostly aiound Loktak lake in the south-east corner of the central basin and in the hilly regions further south around Churachandpur and Singant.
The only odonate (sub) species so far reported from Manipur is lschnura ruJost;gma annandalei LajdJaw by Bhasin (1953).Present study reveals the existence of 22 odonate species and subspecies in the state, II of which are Oriental, the rest, having four Ethiopian eepresentatives, have a wider distribution in Palaearctic and Australian regions.Collection localities and distribution of all the 22 species and subspecies have been given in the text along with taxonomic notes for some of them and additional description of the inadequately known su bspecies lschnura rufostigma annandalei Material examined.-l6, Fagakchaokhiai, coIl. A. R. Lahiri, 19.iii. 1974.Length: 6 abd.+app.32.5, hindwing 22.5 mm; postnodals: forewing 12, hindwing 10.
The specimen agree with th~ description of Javan specimens (Fraser, 1933) in the markings of the Postc1ypeus and that of the 2nd abdominal segment.Frasel (op.c•h.) recorded this species as P. bengalense Laidlaw, which has been synonimaised with P. australasiae Sel)•s (lieftinck, 1954).
Distribution.-Manipur(present /record).Extends from Eastern India (Bengal and Assam) through Burma and Malaysia to Australia.
Distribution.-Manipur(present record).Recor~ed dis.tribution of the species is from Ceylon through India to Burma.
Distribution.-Manipur(present record).This is a wind-borne species scatteredly distributed throughout Indo-Australian and Pacific regions.
Female.-Prothorax with posterior lobe (Text-fig.1 J) trip'1rtite, the mid 1000 squarely produced backwards and IS arched.Mesosigmal plate (Text-fig.J, I) with l~minae ~inilar to male, but broader and broadly connected wjth anterior carina.Abdomen similar to mal.e in isochlomatic form, but in heterochromatic form, pale greenish yellow on sides and beneath; segment 1 and 2 somewhat reddish on dorsuUl, the latter bearing a pear shaped black mark; remaining segments broadly marked with black dorsa) stripe, constricted at base on segments 3-6.
Remark.-From the nominate sp~cies.I. r. annandale; Laidlaw differs in having the blue marking on segment 8, black markings on segment 2, 8 and the tubercles and finally in having more robust anal appendages, the inferiors being more extensively marked with black.
From I. mildredae Fraser, I. r. annandale; differs in having very broad (vs small and rounded) blue markings on segment 8. (also see Fraser 1 1933).

Distribution.-Manipur
Distribution.-Manipur(present record).The subspecies extends from Ceylon, through eastern India (Assam) and Burma to the Pacific Islands.