ORDER THYSANOPTERA. 449 



Ranunculus, &c. in which I find along with it a yellow larva, 

 like that of Thr. vulgatissima. 



Sp. 18. Thr. corymbiferarum. Mas et Fern. 



In the flowers of Corymbifercs, with a white border, in the 

 Botanical garden at Glassnevin, near Dublin. 



Sp. 19. Thr. minutissima. Linn. Fna. S. No. 1028. 

 In company with Thr. vulgatissima, and not rare. 



Sp. 20. Thr. discolor. Mas et Fern. 

 In flowers of Cruciferce, Glassnevin. 



Sp. 21. Thr. livida. 



In flowers of Ulex Furopcea, very rare. 



Subs. BB. Elytra linearia, fasciata. 

 Sp. 22. Thr. Primula. Mas et Fern. 



Distinguished from the rest of this section by its small size and 

 paler tints ; the style of the antennas is filiform and biarticulate. 



Inhabits the flowers of the primrose abundantly. 



Sp. 23. Thr. decora. Nigra, antennarum articulo 2 d0 . apice, 

 3 U . toto, 4 t0 . basi, tibiis apice, anticis fere totis tarsisque 

 pallidis ; antennarum stylo distincte biarticulato. 



The style of the antennas, in this species, is longer than in Thr. 

 vulgatissima, and distinctly biarticulate ; in the remaining species 

 it becomes much shorter. 



Sp. 24. Thr. dispar. Fem. Nigra, antennis fuscis medio 

 indeterminate pallidis ; tibiis tarsisque pallidis, Mis basi, 

 anticis angustius fuscis. Mas. Nigro-fusca, antennis pedi- 

 busque pallidis, Mis basi et apice, femoribus basi, poste- 

 rioribus late infuscatis ; elytrorum rudimentis albidis 

 tantum. 



Style of antennas much less distinctly articulated and shorter than 

 in the last. 

 On Festuca fluitans, and other grasses, in autumn; not rare. 



Sp. 25. Thr. brevicornis. Fem. 



Distinguished by the short antennas which become thicker towards 

 the end. 



Found on Festuca jluitans ; very rare. 

 no. v. VOL. III. 3 M 



