LIBKLLULID.E. LIBELLULA. 93 



crassiorem Julvescentibus, posticis baseos macula magna Jusca. (Long. corp. 

 2 unc. 3 — 4 lin,; Exp. Alar. 3 unc. 2—3 lin.) 



Li. bimaculata. Charpentier, HortB Ent.p. 45 } — Steph. Nonien. 2d edit. col. 115. 



Head fulvous ; mouth flavescent, dusky above ; thorax dull testaceous^ with 

 dusky streaks and clouds ; abdomen testaceous, with a broad irregular 

 fuscous stripe down the back ; anal appendages black, lower one short and 

 emarginate, of the female somewhat cylindric and divergent ; legs black, 

 with the base of the femora fulvous ; wings yellowish, with a pale tawny 

 streak from the base to beyond the middle, the posterior pair with a large 

 triangular fuscous spot, with saffron nervures at the base ; stigma black. 



The anterior wings have sometimes two longitudinal fuscous streaks at the 

 base. 



Taken in the neighbourhood of Whittlesea Mere, in June. 



Sp. 6. cancellata, Abdomine supra cinereo-carulescens, apice nigro (mas), aut 

 olivaceo strigd utrinque longitudinali nigra (foemina) ; alis hyalinis, stigmate 

 nigro. (Long. corp. 1 unc. 10 lin. ; Exp. Alar. 3 unc. 1 — 2 lin.) 



Li. cancellata. Linne. — Donovan, v. xiv. pi. 472. — Steph. Calal. 309. No. 3442. 



Head ashy; mouth brown ; eyes green ; thorax olivaceous above,with two short 

 black humeral streaks on both sides, the sides pale, with an olivaceous oblique 

 line, edged with two black ones ; breast dusted with whitish ; abdomen 

 depressed, gibbous at the base, ashy-blue, with the sides at the base, the 

 tip of the 6th segment, and the remainder black ; 3rd with a transverse line, 

 and also, with the four next, a dorsal black line ; beneath the 3rd to 6th 

 segments have two oblong pale spots ; anal appendages black, with an ashy 

 tip, lower pair acute; legs black; wings hyaline ; stigma black; accessory 

 membrane fuscous. Female olivaceous ; thorax with two abbreviated dorsal 

 streaks, and another on each side black ; abdomen with the margins of the 

 segments, and an irregular longitudinal line on each side, composed of dark 

 streaks, black ; legs black; femora red, with a black line. 



The male has sometimes a luteous spot on each side of each intermediate 

 abdominal segment ; and the lateral line on the abdomen of the female is 

 occasionally very broad. 



Not uncommon in the marshes in the vicinity of Crayford and 

 Dartford, in June ; and abundant in the neighbourhood of the 

 Croydon Canal, near Oak-of-honour wood, Peckham. 



Sp. 7. caerulescens. Cinereo-fusca abdomine ccerulescente (mas) aut rufesceiis 

 (foemina), thorace 'strigis 2-hus pallidis, alis hyalinis, stigmate fusco aut 

 brunneo, membranuld accessoria alba. (Long. corp. 1 unc. 4 — 6§ hn. ; Exp. 

 Alar. 2 unc. 3 — 7 lin.) 



Li. caerulescens. Fabricius, Supp. 285. — Li. Donovani. Leach.— Steph. CataL 

 309. No, 3441 — Li. biguttata. Donovan, v. xiii. pi. 449. 



