ON BORNEAN DRAGOXFLIES. 63 



(4) ISTicoLL, W, 1906. — "Notes on Trematode Parasites of the 



Cockle and Mussel." Ann. Mag. JSTat. Hist. (7) xvii. 

 pp. 148-155. 



(5) NicoLL, W. 1 907. — "Observations on the Trematode Parasites 



of British Birds." Ibid. xx. pp. 245-271. 



(6) Odhner, T. 1 904. — " Die Trematoden des ai-ktischen Gebietes." 



Fauna Arctica, iv. pp. 291-372. 



5. Contributions to a Study of the Dragonfly Fauna oE 

 Borneo. — Part I. The Oorduliinse : The Genus Amphi- 

 cnemis : The Legion Protoneura. By F. F. Laidlaw, 

 M.A., F.Z.S. 



[Received October 17, 1912 : Read November 12, 1912.J 

 (Plate IV.*) 



Index. 



Morpliolo^y : Page 

 Structure of terminal abdominal segments of Iletaphya 



and Idionyx 66 



Geographical Zoology : 



CorduliiniB of Borneo 63 



Distribution of the genus ^TOp/ij'cwemts 70 



Distribution of certain species of the genus 



Disparoiieura 74 



Systematic : 



The classification of the Corduliinaj 63 



Idionyx doJirni Kruger, subsp. horneensis nov 67" 



Amphicnemis louises, sp. n 71 



A. madelencB, sp. n 71 



List of the Icnown species of the genus Amphicnemis 74 



The verticalis section of the genus Disparoneura 75 



D. peramwna, sp. n 76 



D. hosei, sp. n 78 



Protosticta versicolor, S'p. u 78 



ANISOPTERA. 



CORDULIIN^. 



The most recent classification of this subfamily is that 

 suggested by Tillyardf. He proposes to arrange the various 

 genera composing it into four groups, as below : — 



i. Eucordulina ; 



ii. Idocordulina ; 

 iii. Macromina ; 

 iv. Synthemitia. 



Of these groups i., iii., and iv. are on the whole well charac- 

 terised, the larvas are moderately well known, and the geographical 



* For explanation of the Plate see p. 79. 



t Tillyard, Proc. Linn. Soc. N. S. W. 1912, xxxvi. 2, pp. 381-386. 



