PyrrJiosoma. 253 



1296 (1876). Agrioii amarjoii, Hansem. Wiedem. Zool. 

 Mag. (2) i. 152 (1823). Aon'oii sdiig/iii/cdi, IJnd. Mon. 

 Lib. Eur. 4.1 (1825); Selys Mon. Lib. Eur. 152 (1840). 

 Agrioji saiiguiitciiiii, Ramb. Hist. Nat. Ins. Nevr. 262 

 (1842). Agrioii fiih'ipes, Steph. Illustr. Brit. Ent. Mand. 

 vi. 75, n. II (1836). Erythroinina fnlvipcs, Evans Brit. 

 Lib. 16, pi. 5, f. 5 (1845). Erythrouuiia chloridioii, Evans 

 Brit. Lib. 16, pi. 5, f. 6 (1845J. 



[Sulzer's description and lii,'urc seem to have been long over- 

 looked, but they ha\e six years' priority over those of Harris, and 

 the alteration from uiinium to nvinphula is therefore a necessitj'. 

 In Evan>, E. fulvipes seems to be a somewhat immature female of 

 P. nymphula, and E. chloridion a very immature female of the same 

 species. The apex of the abdomen with male appendages, by the 

 side of E. chhn-idion, apparently belongs to Erythromma naias.'] 



Sulzer's description. 



Lib. nyiiipliiila. Mit glaslautern Flugeln ; der ganze 

 Leib ist schon roth, der Brustschild griin und schwarz 

 gestrichelt ; der Hinterleib ist mit schwarzen Ringen. 

 (J. H. Sulzer, " Abgektirzte Geschichte der Lisekten, 

 nach dem Linneischen System," t. 24, f. 5, 1776.) 



Size. 



Length of Male, 35mm. to 37mm. ; expanse of wings, 

 43mm. to 46mm. Length of Female, 33mm. to 37"5mm. ; 

 expanse of wings, 46mm. to 50'5mm. 



Male Imago. 



Face yellow, with black hairs ; sutures between parts 

 above mouth black. Top of head black. Eyes crimson. 

 Prothovax black, margined with crimson. Thorax bronze- 

 black on dorsal surface, with two longitudinal crimson 

 stripes ; yellow below ; projections between wings crimson 



