"274 NEW YORK STATE MUSEUM 



dots on the dorsal side is a double row of broader, obscurer 

 brownish marks close beside the middle pale line. The number 

 of lateral setae appears to be somewhat variable: while six is 

 the normal number, seven occur sometimes ; but the species is in 

 such cases distinguishable from b a s a 1 i s by the brown mark- 

 ing's just described. 



Libellula plumbea (supposition) 

 I have a single specimen of this species, received from Mr 

 C. S. Brimley of Raleigh N. C. It is very similar to the nymph 

 •of L. c y a n e a , but is at once distinguished by the passssion 

 of eight lateral setae on the labium. 



Length 17mm. abdomen 10mm, hind femur 5mm; width of head 

 5mm, of abdomen 7mm (not fully grown). Head with an anvil- 

 shaped black mark on either side of the median ocellus; a pale 

 median line extends from the median suture of the head to the 

 base of the abdomen; segments 2-8 of abdomen each with a pair 

 of large, oblique, brown spots on the sides, becoming diffuse on 7 

 and 8 and the apical portion of each becoming detached as a 

 darker, small, round dot; there is also an outer row of dots 

 blacker on segments 4-9; femora and tibiae faintly twice banded. 

 There are four lines of pubescence each side down the back of 

 the head. 



Lateral setae of labium 8, mentals 12-13, each side of 

 which the outer seven are in a larger series. Dorsal hooks of 

 abdomen on segments 4-8, spinelike on 6-8, and straight on the 

 superior margin differing in this from nymphs of basalis, 

 in which the apexes are declined and the upper margin arcuate). 

 The superior appendage is longer and more contracted in the 

 middle and more attenuate to the apex than in basalis. 



I conclude my part of this appendix with a tabular statement 

 of the general features of the habitat of such New York species 

 as I have had good opportunity for observing in the field. Further 

 observation will probably discover that some of these have a 

 wider range of habitat; but 1 trust that this table contains 

 hints that will be of use to the amateur collector. My record 

 for brackish water species is based on a small collection from 

 8able island sent me by Dr James Fletcher. There is no fresh 

 water there; and the material sent included cast uymphal skins 

 of the two species listed here, taken on the spot. 



J 



