246 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



Cyanea is closely related to L. flavida Rambiir (plumbea Uhler), 

 which is regarded by some as a synonym. The latter has a range 

 well to the south of Connecticut but is found in New Jersey and 

 may at some time be taken in this State. It seems to be a fairly 

 distinct species although the characters intergrade, as pointed out 

 by Calvert (Ent. News, 18: 201-204: 1907). The species flavida 

 is larger than cyanea, and the pterostigma is yellowish in contrast 

 with the usual cream color of cyanea. The pterostigma of flavida 

 is also longer and narrower than that of cyanea, measuring 5.5 to 

 6 mm. by i mm., or a trifle more in width, whereas that of cyanea 

 rarely measures over 5 mm. in length and is 1.3 mm. in width. 



Libellula exusta Say 



Journal of the Academy of Natural Sciences of Philadelphia, 8 : 29 : 1839. 



Nymph. — Color dark brown. 



Head : caudo-lateral margins with long setae ; labium as in 

 PI. VII, Fig. 5, the distal margin of the mentum crenulate with a 

 single spine between each crenulation; lateral setae of the palpi 

 five; mentum with three small setae on each side and a number 

 of very small ones mesad of these; teeth of the labial palpi very 

 shallow. 



Thorax: uniformly colored including the legs. 



Abdomen : conspicuous dorsal spines on segments 4 to 8 inclu- 

 sive; terminal appendages long, the laterals, however, only one- 

 fourth to one-third as long as the ventral appendages. 



Measurements : length of hind femora, 4 mm. ; length of meta- 

 thoracic wing-cases, 5.2 mm. ; length of abdomen, about 14 mm. 



Described from the exuviae of a single reared specimen collected 

 Hamden, May, 1923; emerged 21 May, 1923. 



Libellula exusta Say, var. julia Uhler 



Proceedings of the Academy of Natural Sciences of Philadelphia. 88: 

 1857. 



Adult, male (PI. xx, a). — Color brown to black; frequently 

 pollinose. 



Head : labium brown ; labrum yellowish ; clypeus and front 

 grayish brown, ocellar area nearly black ; vertex and rear of head 

 yellowish brown to almost black, with one or two obscure yellow 

 spots behind the caudo-lateral margin of the compound eyes. 



Thorax: dark brown, the lateral third of each mesepisterna 

 being much darker than the remainder of the thorax ; dorsum of 

 thorax including the mesal two-thirds of the anepisterna usually 

 pollinose and in older specimens white ; legs black, coxae, tro- 

 chanters, and femora a trifle paler; ventral tooth of the tarsal 

 claw beyond the middle ; wings mostly clear, the front wings with 

 an opaque dash between Sc and R -f M extending to the first ante- 



