346 BRITISH SPECIES [CH. 



very small (fig. 176 c). Colour scarlet all over. $ hw 30 31, pt yellow. 

 Coloration yellowish brown. V.v. very small, not prominent. Very rare; 

 Southern. May June. 



23. S. flaveolum Linn. abd 24 25, hw 28 29, pt 2, red. Venation 

 dark, C yellowish. Fw with large basal patch of saffron ; hw richly saffroned 

 throughout basal half. Thorax dark red ; abd. light red. Hamulus with 

 short equal branches, the inner much bent (fig. 176 F). $ similar but olive 

 yellow; wings even more saffroned; v.v. very small, triangular. Local; 

 Southern. Aug. Sept. 



24. 8. sanquineum Miiller. $ abd 22 23, hw 27 29, pt 2-5, dark red. 

 Venation reddish black. Bases of wings slightly saffroned. Thorax reddish 

 brown. Abd. constricted at 4, deep red, except 1 and base of 2 black ; 3 7 with 

 two tiny black spots; 8 9 with mid-dorsal black streak. Hamulus large, 

 with nearly straight inner branch longer than outer (fig. 176 D). $ abd 24 25, 

 hiv 29 30, pt 2-5, deep red. Coloration olive-yellow ; abd. tapering posteriorly. 

 V.v. small, triangular. Local; Southern. July Oct. 



25. S. danae Siilzer (=S. scoticum Don). $ abd 2122, hw 34 26, 

 pt 2, broad, black. Wings hyaline ; ' venation black. Coloration black. 

 Abd. much constricted at 4, dilated at 8. Hamulus large, with both inner 

 and outer branches equally long (fig. 176 E). ? abd 22 23, hiv 26 27, 

 pt 2-5. Coloration orange-brown, reddish-brown or brownish -black when 

 mature, yellowish with black markings when immature. Abd. tapering 

 posteriorly. V.v. large, very prominent, pointed. Common. July Oct. 



Tribe Leucorrhiniini (Characters, p. 272). 



Genus XII. Leucorrhinia Brittinger (fig. 134). Fw with less than 10 Ax, 

 the last one complete. Hw with a dark patch at base. Sectors of arc slightly 

 separated infw, united in hw. Disc, field oifw widened towards wing-border. 



26. L. dubia Vanderlinden. <$ abd 26 27, hw 27 28, pt 1-5 2, dark 

 brown. A dark brown triangular patch at base of hw ; a small dark spot at 

 base of fw. Thorax black with two crimson dorsal stripes, also some lateral 

 stripes and lines. Abd. subcylindrical, black, with crimson spots. App. 

 sup. 1-5, black; inf. truncated. ? abd 25 26, hw 27 28, pt 2 2-5. 

 Conspicuous saffroning around basal mark of hw. Crimson of o replaced by 

 yellow. V.v. wide apart at bases, converging, blunt at tips. Local; Northern. 

 July Aug. 



Suborder ZYGOPTERA (Characters, p. 273). 

 Family CALOPTERYGIDAE (Characters, p. 274). 

 Subfamily Calopteryginae (Characters, p. 275). 



Genus XIII. Calopteryx Leach (fig. 177). Wings broad in middle. No 

 regularly formed pt. No cross-veins in ms. 



