AQUATIC INSECTS IN NEW YORK STATE 263 
I bred the species at Galesburg Ill. in June 1896, and Prof. 
C. F. Baker bred it at Auburn Ala. May 15, 1897, and sent me a 
male imago with its cast skin. 
Nymph. Measures in length 8mm, gills barely 4mm additional; 
width of head 2.3mm. 
Color greenish or blackish brown, paler on the legs, on the 
distal two thirds of the antennae, and on the sutures. Clearly 
marked specimens show on the pale upper surface of the head 
a narrow line of brown each side extending from the eye almost 
to the median line parallel to the hind margin; in front of which 
a broader and less well defined band extends between the eyes on 
top of the head. From the head there extends posteriorly to 
the end of the abdomen a dorsal, indistinct median band, divided 
' by a very narrow median line. There are interrupted lines of 
black on the carinae of the femora and tibiae, very narrow. 
Gills [pl.15, e] pale with interrupted pigmentation, tending to 
form diffuse blotches, the most prominent of which is just before 
the middle of 'the gill. 
Body slender. Head compact, with eyes prominent, obtusely 
rounded, scurfy, hairy hind angles, and deeply and roundly ex- 
cavate on hind margin. Legs slender. Wings reaching the base 
of the fourth abdominal segment. Abdomen a little longer than 
the gills. Gills lanceolate, long pointed, nearly bilaterally 
symmetric, widest just beyond the middle. 
Antennae seven jointed, the relative length of the joints being 
as follows in order from the base: 1:1.8:2:1.8:1.5:1.4:1.2:1. 
Labium of moderate length, mentum not strongly contracted at 
base, median lobe prominent, fringed with microscopic scales so 
arranged as to give a serrate edge, mental setae four and often 
a small rudiment of a fifth, lateral setae [pl.14, 7] five, movable 
hook short, arcuate, end hook blunt, and above it on the end 
of the lateral lobe, three well defined teeth, and above them a 
denticulate angular prominence. 
APPENDIX ON ODONATA 
During the past season there has been opportunity for making 
some further observations on the Odonata-Anisoptera; and in 
the lapse of time since Bulletin 47 was issued collections have 
been received from a number of friends, and among the speci 
mens received are a number of nymphs of species belonging to 
the New York fauna. It is now possible to add descriptions of 
the nymphs of 11 additional species, with new data on some 
