Dragon-flies and Damsel-flies 
95 
or less yellowish at base and along the front margin, and a small fuscous 
nodal spot, hind wings with a yellowish-black triangular basal spot and 
fuscous nodal spot; and L. semi-fas data, whose complex wing-markings are 
Fig. 127.—The water-prince, Epicordulia princeps, female. 
(After Needham; natural size.) 
shown in Fig. 126. Tramea is a genus of large swift dragon-flies whose 
hind wings have the base expanded and conspicuously colored. Tramea 
lacerata is a familiar species. The water-prince, Epicordulia princeps (Fig. 
Fig. 128.—The amber wing, Perithemis domitia, male at left, female at right. 
(After Needham; natural size.) 
127), is a common large dragon-fly, but one hard to capture because of its 
fine flight. The wings show a basal patch, often nearly wanting on the 
front pair, a patch at the nodus, and a black apex. It likes “ponds or slug- 
