No. 39] ODONATA OF CONNECTICUT: LIBELLULIDAE 249 



each side of the dorsum extending from the first segment where 

 the two Hnes unite, to the caudal margin of the eighth segment, 

 the stripes gradually narrowed caudad ; venter of the terga with 

 somewhat similar stripes one on each side, extending from 3 to 8, 

 and gradually narrowed caudad ; anal appendages black or dark 

 brown, the superiors but little longer than the inferiors ; hamules 

 of the second abdominal segment composed of large mesal hooks, 

 the lateral lobes reduced to an acute ridge (Fig. 63, No. 6), abdo- 

 men with very few and very short hairs and appearing glabrous in 

 most individuals ; terga 2 and 3 with median transverse carinae. 



Female. — The clypeus and front are brown ; the brown marks 

 of the wings do not extend quite so far distad as those of the 

 male ; tips of wings between stigma and apex, flavescent ; lateral 

 abdominal stripes of the abdomen are somewhat broader ; lateral 

 margins of terga 8 not leaf -like or produced ventrad ; genitalia as 

 in Fig. 63, No. i. 



The dark base of the wings is characteristic of both sexes. 



Measurements : total length, male 43-45, female 42 mm. ; length 

 of abdomen, male 25-26, female 25 mm. ; length of hind wings, 

 male 36-39, female 39 mm. ; width of hind wings, male 12-13, 

 female 12-13 ^'^^- ', length of stigma, male and female, 4-5 mm. 



Connecticut. — Berlin, 26 June, 1905 (W, E. B.) ; New Haven, 6 July, 

 1904 (H. L. V.) ; Southington, 5 July, 1905 (B. H. W.) ; Easton, 19 June, 

 6 July, 1922 (P. G.). Common throughout the State. 



New England. — June 3-September 6. 



Libellula pulchella Drury 



Illustration of Natural History, i : pi. xlviii, f . 5 : 1773. 



Nymph. — Color dark brown; general shape the same as Pla- 

 themis (PI. iv, Fig. 7). 



Head: labium with 12 to 13 mental setae; distal margin with 

 about 15 small spinules, the margin serrate between each, there 

 being for the most part more than one serration except for those 

 nearest the point of articulation of the labial palpi ; lateral setae 

 of the palpi 9 with a smaller one (sometimes 2) at base just beyond 

 the point of articulation and a group of minute ones (8-9) mesad 

 of these; 10 to 11 notches present in the distal margin, the teeth 

 each with 4 heavy setae except the two teeth alongside the movable 

 end hook, the heavy setae in a graded series. 



Abdomen : lanceolate with dorsal setose hooks on segments 4, 

 5 and 6, and a low elevation on 7 ; 8 and 9 without dorsal hooks 

 of any kind, but the long marginal setae are grouped together at 

 the point where these hooks occur in other species ; lateral keels 

 provided with short spines and longer setae, and the dorsal surface 

 of the median terminal appendage also setose ; lateral spines 

 present on segments 8 and 9; lateral appendages less than half 

 the length of the inferiors. 



