MAY PLIES AND MIDGES OF NEW YORK 31 



esting also, because it offers a transition form to the Odonata. 

 A comparatively slight degree of consolidation of the labial 

 parts here present, and a slightly better development of the two 

 points at the tip of the palpus (of which the last joint is homo- 

 logous with the movable hook, and the internal prolongation of 

 the preceding joint equals the end hook of the Odonata), would 

 give the grasping labium, so characteristic of the nymphs in 

 that order. 



Much has been written concerning the anatomy of this inter- 

 esting species — especially the anatomy of the nymph. A full 

 bibliography and a new description with some excellent figures 

 are given in Eaton's Monograph, pp.22G-229, pl.21 and 42. 



Less is known concerning its manner of life. In a general Avay 

 it may be said to inhabit the more rapid portions of our larger 

 rivers and to be very local. It is rare in collections. 



Chirotenetes albomanicatus sp. uov. 



The ichite-gloved hoiodif- 



Plates 5 and 6 



This is the common Ithaca species, whose nymph is figured on 

 page 87 of Comstock's Manual for the Study of Insects. It has 

 been referred hitherto to C h. siccus Walsh. It differs from 

 Walsh's description of that species in its larger size, later sea- 

 son of appearance, separateness of eyes in male subimago, colora- 

 tion of front tarsi and of forceps and in conspicuous black trans- 

 verse apical lines on abdominal segments. It agrees better 

 with Eaton's description and fairly well with his figure of that 

 species, but I doubt whether Eaton had the species of Walsh. 

 Pending the reidentification of Walsh's species, I think that less 

 confusion will result if this one be kept apart under a new name. 



This species is. abundant in all the rapid streams about Ithaca. 

 I have observed the nymph, especially in those places where the 

 creek bed is flat shelving rock over which the water streams in a 

 thin sheet. In such places the flat, rocky floor of the stream is 



^Lest it be not discerned. I will state openly that the common name 

 "howdy," which I apply to the members of this genus, is a very free trans- 

 lation Into western vernacular of the generic name. 



