108 Mr. K I R BY on Mr. TV. S. MacLeay's Doctrine of Ajfinity, SfC. 



Corpus nigrum, sub sole splendore obscure metallico subnitens. 

 Caput subpilosum. Truncus brunneo-niger, supra lineis 

 tribus longitudinalibus, intermedio elevato, nigris, sub alls 

 primoribus strigis tribus obliquis, superiori obsoletiori, pal- 

 lidis. Al(B subhyalinae, basi Isete sanguineae, posticis apice 

 macula subrotunda ejusdem coloris. Stigma nigrum ob- 

 longo-quadratum . Abdomen elongatum, tenue, transversim 

 rugulosum, basi et apice subincrassatum. Forceps analis 

 rectus ? inferiori subincurvo. 



N. B. In quibusdam speciminibus macula rotunda sanguinea 

 alas primores item apice ornat. An sex<is varietas ? 



Nomen dedi in honorem D. Brightwell Norvicensis, inseclorum col- 

 lectoris indefessi, felicis ; indagatoris acuti, docti. 



The upper anal forceps in the specimens of this insect that I 

 have had an opportunity of examining were mutilated ; I cannot 

 therefore be positive that it does not approach nearer to Lestes 

 of Dr. Leach, the stigma of which its wings exhibit, than to 

 Agrion ; but as these last are not suddenly narrower at their 

 base, as in the Jormer genus, I have considered it as belonging 

 to the latter. 



EXPLA- 



