INSECUTOR INSCITI^ MENSTRUUS 109 



the middle, followed by a four-haired tuft ; anal segment about 

 three- fourths encircled by the plate. 



Haemagogus (Haemagogus) argyromeris Dyar & Ludlow. 



Haemagogus argyromeris Dyar & Ludlow, The Military Sur- 

 geon, xlviii, 679, 1921. 



This species is abundant and the only common Haemagogus 

 with simple claws in the female native to the Pacific side of 

 the Isthmus of Panama. Since the building of the canal, it 

 has extended its range toward the Atlantic, late specimens 

 being taken as far as Gatun. The following localities are 

 before me, the year of capture in this case being unusually 

 important: Taboga Island, Panama, 1908 (A. H. Jennings); 

 Panama City, Panama, 1908 (A. H. Jennings) ; Corozal, Canal 

 Zone, Panama, November, 1918 (J. Zetek) ; Miraflores, Canal 

 Zone, Panama, May 9, 1908 (A. H. Jennings) ; Paraiso, Canal 

 Zone, Panama, April, 1918 (J. Zetek) ; La Pita, Canal Zone, 

 Panama, June 20, 1921 (through Dr. Ludlow) ; Empire, Canal 

 Zone, Panama, May 18, 1908 (A. H. Jennings) ; Pedro 

 Miguel, Canal Zone, Panama, August 9, 1919 (J. Zetek) ; 

 Ancon, Canal Zone, Panama, July 17, 1908 (A. H. Jennings) ; 

 Rio Chagres, Panama, May 20, 1907 (A. Busck) ; Las Cas- 

 cadas, Canal Zone, Panama, May, 1907 (A. Busck) ; Spillway, 

 Gatun, Canal Zone, Panama, August 23, 1912 (J. Zetek) ; 

 Gatun, Canal Zone, Panama, December, 1913 (H. R. Trask). 



The male hypopygium is peculiar in the structure of the 

 claspette, the stem of which is enlarged into a flattened club, 

 on which the filament is reversed, cleft, forming two retrose 

 points. 



The larva is described in the monograph under the name 

 "albomaculatus" (vol. iv, 870, 1917) and figured (vol. ii, pi. 

 126, fig. 439), specimens being before me Jennings, breeding 

 number 38, Dunn, breeding number C-48, and Zetek, breeding 

 number 1057. 



Jennings' specimens were bred from tree-holes, Dunn's 

 from "a flower-pot in a garden at Corozal," while Mr. Zetek's 

 notes confine themselves to the entry "Haemagogus." 



