334 MR. F, F. LAIDLAW ON 



['CCELICCIA BORNKENSIS (Seljs).] 



Codiccia horneensis Kirby, Cat. Odonata, p. 128. 

 (See nnder C octogesima (Selys), Liudlaw, Proc. Zool. Soc. 

 London, 1917, p. 231.) 



143. OoPERA ATOMARiA (Selys). (Text-fig. 3.) 



Copera atomaria Kirby, Cat. Odonata, p. 129. 



(See also Ki-iiger, Stettin. Entomol. Zeitg. 1898, pp. 103-107 ; 

 Ris, Tijdschr. v. Entomol. Iviii. 1915, p. 7, sep.) 



Upper anal appendages of male about one-half length of lower 

 pair. Tibise not dilated. In the adnlt male the thoi^ax is bronze- 

 black above, with a few irregular yellow spots repjesenting the 

 antehumernl band. The sides of the thoi'a,x are mottled black 

 and yellow, the legs are entirely red-brown. Abdomen black, with 

 yellow lateral markings on segments 1 and 2 and a basal bluish- 

 white 3'ing on segments 3-6. Segment 10 and upper pair of anal 

 a,ppendages white, lower pair of appendages l)lack ; distal half 

 marked with white dorsally. 



Text-fififure 3. 



Prothorax of Copera atomaria seen from above. 



Adult female coloured much as the male, but duller. The 

 posterior femora have a row of black dots along their dorsal 

 surface. The posterior thoracic margin of the female carries a 

 pair of small triangular projections directed upwards and for- 

 wards. These ai^e much less acute than the corresponding 

 structures of the Sumatran species, C. acutimargo'Kvi\geY. 



S . Abd. 28-1- 0-75 mm., h.w. 17-5 mm. $. Abd. 30 mm., 

 h. w. 19 mm. 



Specimens from Lio Matu seem to have been taken in com- 

 pany with Caconeura verticcdis Selys ; at least in many cases 1 

 found examples of both species papered together. 



To what extent these Bornean specimens are to be regarded as 

 distinct from other allied forms of the genus it is at present 

 impossible to say. But I think it likely that a number of forms 

 of the vittata series of the genus will ultimately be characterized. 

 As I have seen cnly examples of one form from Borneo, I have 

 retained for it the Selysian name, 



i 



