ORDER THYSANOPTERA. 447 



Sp. 7. Thr. phalerata. Mas et Fern. Elytris nigricantibus, 

 fascia ante apicem basique pallidis. 



I found a very few specimens on the borders of a corn-field ; 

 and I think they were swept off Lathyrus pratensis. 



Sect. AA. Tibice et tarsi inermes. 



Subs. B. Elytra linearia, unicolora basi tantum pallidiora. 



Subs. C. Antenna? stylus filiformis, distincte biarticulatus. 



Sp. 8. Thr. obscura. Fem. Midler. Zool. Dan. No. 1084. 



The larva is like that of Thr. cerealium, but has a shorter head ; 

 and the wing-cases of the pupae are shorter. 



Varies in autumn, with mere rudiments of wings. 



/ommon on w 



heat. 



Sp. 9. Thr. ulmifoliorum. Fem. 



The larva in the same situations, yellow ; distinguished from most 



others by two small spines on the back of the last segment. Pupa 



pale, with very short wing cases. 



I have found it undergoing the metamorphosis within the 

 cavity of effete female cocci of the elm. Solitary on the under- 

 side of elm-leaves. 



Mr. Curtis has kindly shown me a tract, by Professor Pas- 

 serini, b on the Thrips of the olive, a species very injurious to 

 that valuable tree, which also fixes itself under the leaves. No 

 description is given ; but as Passerini supposes it to be Thr. 

 physapus, I conclude the colour to be dark, while Thr. ulmi- 

 foliorum is nearly as pale as Thr. obscura. 



Sp. 10. Thr. atrata. Mas et Fem. Nigra antennis pedibusque 

 fere concoloribus ; elytris nigricantibus, basi albidis. 



In the flowers of Convolvulus Soldanella, Dianthus, Cen- 

 taurea, Cyanus, Campanula;, &c. 



Sp. 11. Thr. vulgatissima. Mas et Fem. 



Thrips physapus . De Geer, III. 6. No. 1. Tab. 1. fig. 1. 

 Shaiv, Zool. VI. 199. PL 63. 



b Notizie sopra una specie d'insetto del Gen. Thrips dannoso agli Olivi nel 

 Territorio de Pietrasanta n. Atti dell'Accad. de Georgofili. T. xii. 



