INSECUTOR INSCITI^ MENSTRUUS 195 



widened at tip, with a small seta, the filament longer than the 

 stem, broadly ribband-shaped with wide tip. 



Types, two females and four males, No. 25765, U. S. Nat. 

 Mus. ; Saint Laurent, Maroni River, French, Guiana, 1909 

 (Dr. E. Brimont, Institut Pasteur). 



One pair in the U. S. National Museum ; one female and 

 three males in the collection of the Museum of Natural History, 

 Paris, France, sent for determination by the kindness of M. E. 

 Seguy of the latter institution. 



Nearly allied to A'edes fluviatilis Lutz, but differing con- 

 spicuously in the form of the claspette filament of the male 

 hypopygium. 



Haemagogus (Stegoconops) leucomelas Lutz. 



The male of this species has at last come to hand, thanks to 

 the efiforts of Mr. J. B. Shropshire. It is a typical Stegoconops, 

 with the male palpi nearly as long as the proboscis, the claws of 

 the female toothed. This was the position originally assigned 

 to it by Dr. Lutz, the describer, although it was placed in A'edes 

 in the monograph. The white line on the mesonotum is most 

 unusual in a Haemagogus. 



Male hypopygium. Side pieces conical, about twice as long 

 as wide, with narrow scales and hairs without; inner area 

 broadly densely tuberculate, with fine hairs ; a group of long 

 lanceolate scales on the inner margin before apex. Clasper 

 small, narrowed on outer third, the spine long, nearly half the 

 length of the clasper (PI. V, fig. 7). Claspette slender, the 

 stem strongly curved, pilose, with one small and two stout 

 setae near its tip ; filament large, angularly widened near base, 

 expanded and ribbed (PI. V, fig. 8). Tenth sternites normal, 

 the tips thickened and recurved. Ninth tergites undeveloped. 



Bred from a larva found in a tree-hole, Comacho, Canal 

 Zone, Panama, April 22, 1922 (J. B. Shropshire). 



Lutz described Haemagogus leucomelas in 1904. It was 

 transferred to Acdes by Howard, Dyar & Knab in 1917. 

 Meigen described an European species as Culex leucomelas in 

 1804, which Martini places in Acdes in 1922 (Ent. Mitteilungen, 



