No. 39] ODONATA OF CONNECTICUT: AESHNIDAE 185 



Thorax: femora uniform brown; wing-cases just reaching 

 segment 5 of the abdomen. 



Abdomen: with a dark mid-dorsal stripe flanked on either side 

 by a pale stripe of about the same width or a little less ; a wide 

 pale stripe on either side just above the lateral keels ; lateral spines 

 present on segments 6-9 inclusive, those on 6 reaching half way 

 to the caudal margin of the segment,'/ just reaching the caudal 

 margin, and those of segments 8 and 9 reaching considerably 

 beyond those margins. 



Measurements : total length, 36 mm. ; length of abdomen, 

 20 mm. ; length of hind femora, 6 mm. ; metathoracic wing-cases, 

 8 mm. ; length of mentum, 6.5 mm., greatest width, 5, width at 

 base, 3 mm. 



Described from a nymph collected in Hamden, 1923, and agree- 

 ing in all particulars with that described as clepsydra by Walker 

 (1912). 





Fig. 30. Aeshna clepsydra, anal 

 appendages and color pattern of 

 thorax. (From Howe.) 



Adult, male. — Preocular band somewhat wider at the base of 

 the antennae than one of the ocelli ; narrowed to a fine line on the 

 sides; T-spot very heavy, the crossbar strongly convex in front 

 2.5-3 mm., stem .75-1.3 mm. 



Thorax : color pattern as in Fig. 30 being different in marking 

 from all other species of Aeshna; anal triangle of the hind wings 

 with two cells. 



Abdomen : auricles with 3, rarely 4 teeth ; spines of the anterior 

 lamina short and blunt, directed ventrad and caudad, not project- 

 ing below the tergal margins ; hamular processes directed mesad 

 and cephalad with bluntly pointed apices and without a distinct 

 apical tubercle ; hamular folds continuous with the processes but 

 distinctly marked off from them, ear-shaped, the outer margins 

 straight, parallel, or slightly divergent, inner margins closely 

 approximate. Superior anal appendages as in Fig. 30. Abdomen 

 with large blue spots, 9 and 10 each with a large dorsal blue spot; 

 8 with small cephalo-lateral and large caudo-dorsal ; 4-7 with two 

 cephalo-lateral very irregular spots and a caudo-dorsal ; 3 with 

 large lateral spot occupying the cephalic half of the lateral surface, 



