HARD WICKE'S SCIENCE- G OSSIP. 



SECOND GROUP. 



"Wings similar in shape. 



Eyes projecting and more widely separated. 



Abdomen very slender. 



FAMILIES. 



Calopierygtdce : Antccubital nervures numerous. 

 AgrionidiE : Two antecubital nervures only. 



(The measurements given arc those of Dr. Hagen.) 

 LiBELLULID.E. 



Genus LibcHnla (Linn.). 

 A. ^Yith \o-\G anticuhilal ncrviircs. 



at base of hind wings, and a brown bar in middle 

 of base of front wings ; thorax brown and hairy ;. 

 abdomen very broad and much depressed, spotted 

 with yellow on the sides ; powdered with cobalt- 

 blue in the male, brown in the female ; accessory 

 membrane white. England, Scotland, and Ireland ; 

 but local. Length 19 lin. ; exp. 32 lin. 



L. fnlva (Midi.). Brown line and triangular spot 

 at base of hind wings, and brown line at- base 

 of front wings ; pterostigma black ; thorax rusty- 

 brown, hairy; abdomen broad, brown in the 9, 

 powdered blue in the i ; has a black band at the apex ;. 



Fig. 27. — Dragon-fly. 



ro 



Fig. 29.— Labium of Libclliila. L, the labium, or lower lip. 

 1', the palpi. 



Fig. 31. — Anal appendages of 

 Libellula, viewed from above. 



B 



Fig. 30. — Anal appendages of 

 vEschna, viewed laterally. 

 A, upper, B, lower, ap- 

 pendages. 



Fig. 28. — Virgin Dragon-fly. (Calepicryx vu'go}. 



Fig. 32. — Hind wing of /Eschna, showing only the principal 

 nervures. A, anal angle; B, cubital point; C, stigma, or 

 pterostigma ; b, b, antecubital nervures ; e, triangle ; F, the 

 accessory membrane ; S, the subnodal sector. 



Z. quaarimaailata (Linn.). Wings with four rows 

 of post-trigonal cells. Colour brown, covered with 

 pubescence ; thorax rather yellow at the sides, with 

 black marks ; abdomen rather broad and conical, 

 with tiji black; a triangular brown patch at the 

 base of the hind wings ; a brown spot in the middle 

 of the costal margin of all the wings ; pterostigma 

 black. General in the British Islands, Length 

 19 lines ; expanse of wings 32 lines. A variety has 

 the tips of the wings also brown. 



Z. depressa (Linn.). Three rows of post-trigonal 

 cells ; pterostigma black ; triangular brown patch 



accessory membrane dark. England ; local. Length 

 19 lin. ; exp. 32 lin. A variety has brown tips to the 

 wings. 



Z. cancellata (Linn.). The wings clear, without 

 spots ; pterostigma black ; accessory membrane 

 blackish ; abdomen broad, brown with two black 

 longitudinal bands ; powdered blue in the 5 ; 

 England ; local. Length 19 lin. ; e.xp. 32 lin. 



Z. cicrithsccns (Fabr.). Wings clear ; in 9 tinged 

 with yellow at the base; pterostigma reddish (5), 

 yellow (9) ; accessory membrane white ; thorax (d) 

 dark (with bluish bloom, easily rubbed off), with. 



