MAY PLIES AND ItllUGES OF NEW YORK 



37 



The accompanying text figures will facilitate the recognition 

 of this species when more and better specimens are at hand. 



This species is a typical representative of A m e 1 e t u s , 

 agreeing in clO'Se detail with the generic characters set forth in 

 Eaton's Monograph p. 210, but it is smaller than any of its con- 

 geners. Its nymph is apparently the one figured by Eaton on 

 pl.49 of his Monograph, and referred to C h i r o t e n e t e s . 



The nymph. (P1.7, fig.l.) Length, 9.5 mm.; antennae, 1 mm.^ 

 and setae, 4 mm. additional. Body elongate, with vertical face, 

 arched thorax, depressed and tapering abdomen. Antennae short, 



Fig-. 6 Parts of nymph of Ameletus ludens sp. nov. ; y, maxilla; z, single gill 

 lamella from one of the middle abdominal segments 



tapering, bare; ocelli in front; labrum quadrangular, a little 

 longer than wide, emarginate in front, Avhere fringed with fine 

 plumose hairs. Mandibles stout, triangular beyond the molar 

 surface, ^bearing the canines upon the prominent apex, outer 

 canine more than twice as large as the inner, the latter preceded 

 by a slender subulate spine on the distal margin. Maxilla with a 

 very wenk and slender and obscurely tliree-jointed palpus. The 

 comlbined lacinia and galea obscurely trapezoidal, the tip of the 

 former indicated by a short, slender and sharp spine, the distal 

 border of the galea fringed densely with a series of strongly 

 arched, regularly graduated and beautifully pectinated hooks 

 (fig.Gi;). Labium with better developed, three-jointed palpi, 



