80 MANDIBULATA. NEUEOPTEllA. 



Sp. 3. xanthostoma? Supra viridi-enea, sericea, ore abdominisque lateribus 

 Ivteis, pectore flavldo picto, alls angustioribus, virescentibiis, posticis apice 

 fuscis. (Long. Corp. 22 lin.; Exp. Alar. 28 lin.) 



Ag. xanthostoma. Ckarpentier, H. E. 6 ? — Ca. xanthostoma. Steph. Nomen. 

 2d edit. Appendix. 



Above bright silky brassy-green ; mouth and sides of the abdomen dull 

 luteous, the three last segments of the latter with a bright testaceous 

 streak ; appendages and legs black, these last long and slender ; breast 

 varied with yellowish; wings narrow, anterior wholly brownish-green, 

 with greenish nervures, posterior brownish-green, with the apical half 

 brown, all with a white stigma. 



Apparently uncommon : my specimens occurred in the vicinity of 

 the metropohs in June, I believe at Darenth wood. 



Sp. 4. anceps. Supra viridi-cenea, sericea, suhtus atra, labro medio, antennarwn 

 basi, abdominisque apice subtus Jlavis, alis latiusculis, areolis numerosissimis 

 minutissimisque. (Long, corp. 2 unc. ; Exp. Alar. 2 unc. 8 lin.) 



Cal. anceps. Steph. Nomen. 2d edit. Appendix. 



Above fine silky brassy-green, beneath black ; middle of the labrum and base 

 of the antennae bright yellow; tip of the abdomen beneath dull yellow; 

 appendages fuscous, black at the apex ; legs black ; wings broad, wholly of 

 an uniform pale brown, with extremely numerous palish nervures, reducing 

 the areolets to about one-third the size of those in the ordinary species. 



It is with some reluctance I give this as a new species, but the extraordinary 

 neuration of the wings demands such a proceeding. 



Found at Coombe wood, in June. 



Family II.— LIBELLULIDJE, Leach. 



Head hemispheric ; ocelli placed in a line, or in a triangle, on a vesicle : ei/es 

 very large, mostly contiguous, sometimes remote : wings, during repose, 

 placed horizontally, and rather ample : abdomen cylindric, or clavate , 

 sometimes depressed, or compressed, rarely thickened in the middle ; of the 

 males with a forcipated appendage : claws toothed. 



The larvse and pupae have the body short, and furnished at its extremity with 

 five appendages, which form an acute or subtruncate tail; the mask is 

 arched or flattish, and the upper edge of the anterior terminates in two 

 serratures, occasionally furnished with a moveable hook at the tip. 



The indigenous species were divided into the following genera by 

 Leach in 1810 ; but the continental writers do not appear to recog- 

 nise more than the two largest groups : — 



