262 BritisJt Dragonfiics. 



33. Pyrrhosoma tenellum. 



(Plate XXIII.) 

 Synonymy. 



Libcllula toiclla, Vill. Linn. Ent. iii. 15, n. 27 (1789). 

 Agrion toicllnni, Selys Rev. Odon. 180 (1850); Hag. 

 Ent. Ann. 58 (1857). Pyrrhosoma tcncllmn, McLach. 

 Cat. Brit. Neur. 17 (1870); Kirby Syn. Cat. Neur. Odon. 

 151 (1890). Agrion rubella, Lind. Opusc. Scient. iv. 105, 

 n. 7, t. 4, f. 6, 7 (1823); Lind. Mon. Lib. Eur. 42, n. 12 

 (1825); Selys Mon. Lib. Eur. 154 (1840 j. Agrioit 

 rubclluin, Steph. Illustr. Brit. Ent. Mand. vi. 71, n. i, 

 pi. 29, f. 4 (1836); Evans Brit. Lib. 13, pi. 3, f. i 

 (i845> 



De Villers' description. 



L. (la Thercse) alis hyalinis, puncto marginali minimo. 

 Abdomine rubro, rubellove, thorace viridi lineato vel non 

 lineato. (C. J. de Villers, " Caroli Linniti Entomologia, 

 Faunae Suecica^ Descriptionibus Aucta," iii., p. 15, 

 n. 27, 1789.) 



Size. 



Length of Male, 30mm. to 32mm. ; expanse of wings, 

 33mm. to 36mm. Length of Female, 31mm. to 33'5mm. ; 

 expanse of wings, 36mm. to 39mm. 



Male Imago. 



Face crimson, with black line at base of nasus. Top 

 of head black. Eyes crimson. Pi-othorax triangular, 

 bronze, hind-margin straight, slightl}' raised. Thorax 

 bronze above, livid below, projections between wings 



