No. 39] ODONATA OF CONNECTICUT: COENAGRIONIDAE 43 



in the front wing and M, arising between 3 and 4 in the front 

 wing' and between 2 and 3 in the hind ; abdomen with the pale 

 and black markings similar to those of the male, but there is a 

 tendency for the terga to become pollinose. 



Measurements : total length, male 24-27, female 27-29 mm. ; 

 length of abdomen, male 19-21, female 18-22 mm.; length of 

 hind wings, male 12-13, female 13-16 mm.; width of hind wings, 

 male 2.5, female 2.5-3.5 ^'^^■ 



Connecticut. — Stratford, 9 July, 1920; Guilford, 13 July, 1920 (P. G.) ; 

 New London, 8-22 June, 1921 (R. H. H.). 



New England. — May 25-September 18. 



Ischnura ramburii Sel} s 



Revue des Odonates ou Libellules d'Europe: 186: 1850. 



Nymph. — Unknown. 



Adult, male. — Color green and yellow, and black. 



Head : labium and face below the basal segments of the 

 antennae yellow, with postclypeus and dorsal margins of labium 

 black ; basal segment of the antennae with a pale yellow spot, 

 remainder black ; dorsum of head above the antennae very dark 

 green, the postocular spots circular, and pale blue; rear of head 

 yellow, black on each side of occipital foramen. 



Thorax : yellowish green and very dark green, the pronotum 

 dark with pale lateral spots and cephalic margin ; coxae mostly 

 pale ; femora black above, pale below ; tibiae and tarsi black or 

 very dark brown, claws darkest at tips. Mesothorax dark, with 

 a very narrow pale line on each anepisternum, the epimera with 

 ventro-lateral margins pale; each metapleura yellow with a black 

 line on the metapleural suture; venter of thorax pale. 



Abdomen : dark green, nearly black, the first two terga greenish 

 on sides, 3-7 inclusive with lateral margins yellow ; narrow pale 

 basal rings on 3-6 or 7, the rings interrupted on the dorsum ; 

 tergum 8 entirely blue, 9 black above, blue on sides, 10 black, the 

 segment, however, yellow beneath; anal appendage (Fig. 10, 

 No. 8) dark brown, the inferiors paler at base. 



Female. — One specimen in our collection has markings iden- 

 tical to the male in nearly all particulars. In some, however, the 

 thorax is a reddish-orange color, and the head is also of this same 

 color. The first abdominal segment and base of the second is 

 also orange.^ In the orange female there is a mid-dorsal but no 

 lateral thoracic stripe. Mesostigmal plates each with transverse 

 ridge, the mesal half being somewhat higher, the lateral half of 

 plate pale. 



^vTeasurements : total length, male 31, female 34 nmi. ; length 

 of abdomen, male 24, female 26 mm. ; length of hind wings, male 



'Calvert, P. P., Trans. Am. Ent. Soc, xx, 240; 180.I. 



