120 



DRAGONFLIES 



[CH. IV 



of <j? subquadrilateral. Length of 36 mm., <j> 35-5 

 mm. Expanse of wings < 45 mm., $ 48 mm. [Very 

 rare.] 



(59) 60. L. sponsa, Hansern. Slender : wing expanse not much 

 greater than length of body (generally), pterostigma 

 relatively narrow. Dorsal anal appendages of $ with 

 very broad inwardly turned flange extending rather less 

 than length and bearing a broad sharp tooth at about 

 from base and terminating abruptly, so as to give 

 appearance of a 2nd tooth; distal remainder narrowly 

 spatulate with distinct "handle," the pair turned gently 

 towards each other. Ventral anal appendages of fully 

 | length of dorsal, parallel to each other. Black spots 

 on dorsal surface of 1st abdominal segment of $ sub- 

 triangular. Length of 3739 mm., <j> 35-539 mm. 

 Expanse of wings 40 44 mm., <j> 43 47 mm. 



(58) 61. genus Erythromma. Abdomen of with segments 1, 2, 

 9 and 10 blue, remainder steel black ; of <j? with 1st 

 segment yellow with black spots, remainder black 

 dorsally, yellow ventrally, anterior intersegmental 

 sutures yellow, posterior blue. Eyes red. 



1 species : E. naias, Hansem. Length of <J 34-5 35'5 

 mm., ? 3535-5 mm. Expanse of wings $ 4344*5 

 mm., $ 46 47 mm. 



(57) 62. Abdomen crimson, 

 genus Pyrrhosoma. 



2 species : 



(64) 63. P. nymphula, Sulz. Thorax with a pair of longitudinal 

 crimson stripes dorsally : posterior part of $ abdomen 

 with dark bronze green markings. Length of $ 35 

 37 mm., $ 33 37*5 mm. Expanse of wings 43 

 46 mm., $ 4650-5 mm. 



(63) 64. P. tenellum, de Vill. Thorax without dorsal crimson 

 stripes : $ abdomen entirely crimson ; first 3 segments 

 only of $ abdomen crimson, remainder bronze green. 

 Length of $ 30 33 mm., <j? 31 33'5 mm. Expanse of 

 wings $ 3336 mm., $ 3639 mm. 



(56) 65. Blue spot behind eyes. 



