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from mouth of Cano Paloma, 8°29'N, 61°25'W, 21 February 1978, J. G. Lundberg 

 and J. N. Baskin. USNM 265693 (4, 75-81), Rio Orinoco, Brazo Imataca, 8°28'N, 

 61°17'W, 22 February 1978, J. G. Lundberg and J. N. Baskin. USNM 265695 (2, 73- 

 83), Rio Orinoco, February 1978, J. G. Lundberg and J. N. Baskin. USNM 265700 

 (1, 80), Boca Grande, shallow river mouth 29 nautical miles from sea buoy, 

 8°35 '24 ' 'N, 60°31 '48 " W, 19 November 1979, J. G. Lundberg et al. USNM 

 265704 (1, 60), channel of Ri'o Orinoco below mouth of Ri'o Arature, 8°36'N, 

 60°54'W, 24 February 1978, J. G. Lundberg and J. N. Baskin. USNM 265712 (3, 70- 

 87), channel of Ri'o Orinoco below Barrancas, 8°24'N, 62°07'W, 17 February 1978, 

 J. G. Lundberg and J. N. Baskin. USNM 265715 (2, 53-60), channel of Ri'o Orinoco 

 near Curiapo, 8°35'N, 60°59'W, 23 February 1978, J. G. Lundberg and J. N. Baskin. 

 USNM 265717 (4, 68-89), Ri'o Orinoco, Brazo Imataca, 8°28'N, 61°17'W, 22 

 February 1978, J. G. Lundberg and J. N. Baskin. State Unknown : CAS-SU 58845 

 (2, 98-155), Ri'o Orinoco, 8 May 1925, C. Ternetz. 



Qyyana.-AMNH 12950 (male, 141), Demerara River at Malali, Great Falls, 

 December 1934, A. S. Pinkus. AMNH 13656 (2, 44-74), Demerera River, April 

 1936, A. S. Pinkus. BMNH 1934.9.12.377 (1, 115), Mazaruni River. CAS 53525 (2, 

 70-99), locality unknown, July 1976-September 1977. FMNH 53247 (holotype of ^4. 

 guianensis; female, 139), Wismar, 1908, C. H. Eigenmann. 



Surinam. -AMNH 54737 (6, 100-131), Corintijn River, km 65, 4 December 

 1979, R. P Vari et al. AMNH 54740 (1, 124), Corintijn River, island opposite Camp 

 MacClemmen, 4 December 1979, R. P. Vari et al. UF 16278 (male, 153), vicinity of 

 Paramaribo, 20 June 1968, W. Greenhood. ANSP 8388, 8389 (2, 159-235; syntypes 

 of A. porphyreus), exact locality unknown. ZMUC 146-148X (4, 85-132), 13 July 

 1842, no other data. USNM 226054 (1, 131), Corantijn River, approximately 

 5°50'N, 57°07'W, 14 May 1980, H. M. Madarie. USNM 226065 (3, 47-82), 



