2^4 Brztis/i Dragoiijfics. 



31. Erythromma naias, Hansem. 



(Plate XXII.) 

 Synonymy. 



Agrion naias, Hansem. Wiedem. Zool. Mag. ii. (i) 15S 

 (1823); Selys Mon. Lib. Eur. 151 (1840); Selys Rev. 

 Odon. 177 (1850); Hag. Ent. Ann. 58 (1857). 

 Erythromma naias, Selys Bull. Acad. Belg. (2) xli. 1302 

 (1876); McLach. Cat. Brit. Neur. 16 (1870); Kirby Syn. 

 Cat. Neur. Odon. 152 (1890); Agrion analis, Lind. Mon. 

 Lib. Eur. 40, n. 10 (1825). Agrion cJiloridion, Charp. 

 Hon Ent. 14, t. i. f. 21 (1825) ; Charp. Lib. Eur. 148, t. 

 37, upper Fig. (1840); Steph. Illustr. Brit. Ent. Mand. 

 vi. 75, n. 12 (1836). 



Hansemann's description. 



A. alis erectis petiolatis hyalinis, earum interstitio Iste 

 coeruleo, stigmatibus rhombeis fuscis, capite immaculato^ 

 thorace maris supra immaculate, foeminai subbilineato. 

 Then follows a lengthy account of the insect in German. 

 (J. W. A. Hansemann, " Zoologisches Magazin," Heraus- 

 gegeben von Dr. C. R. W. Wiedemann, p. 158, 1823). 



Size. 



Length of Male, 34-5 to 35-5mm. ; expanse of wings,. 

 43mm. to 44-5mm. Length of Female, 35mm. to 

 35*5mm. ; expanse of wings, 46mm. to 47mm. 



Male Imago. 

 Head, Face reddish-brown ; nasus and frons black, 

 the two separated by a reddish-brown line ; top of head 

 and occiput black. Eyes red. ProtJiorax black above>. 



