[ 19 ] 



II. Descriptions of several new Homopterous Insects belonging to various Sub- 

 genera o/Dei-be of Fabricius. By J. O. Westwood, Esq., F.L.S., 8fc. 



Read February 2nd, 1841. 



1 BEG leave to offer to the Linnean Society the following descriptions of 

 new species of Homopterous insects belonging to various subgenera of the 

 genus Derbe, illustrated by me in a paper lately communicated to this So- 

 ciety; one of the species forming a new and very interesting subgenus, and 

 described from an unique specimen in the collections of this Society. 



Mysidia subfasciata. Westw. 

 M. alba; alis fusco transverse nebulosis punctoque ante apicem nigro ornatis. 

 Long. corp. lin. 2\. Expans. alar. lin. 9. 

 Habitat in Brasilia, D. Burchell et Swainson. In Mus. Soc. Zool. Lond. et D. Burchell. 



M. albipenni valde affinis a qua differt prothoracis margine antico pallide fulvo aut conco- 

 lori ; alis magis pulverosis, albis, nebulis transversis fuscis notatis ; vena postcostali ante 

 apicem macula rotundata nigra notata (ad basin arete parvas triangularis); venis tribus 

 brevibus ex ilia area postice emissis interdum bipunctatis ; venis quatuor transversis 

 ante apicem alarum nigricantibus ; maculis reliquis pariim distinctis ; ramo postico venae 

 postcostalis ad apicem irregulariter furcato ; venis alarum posticarum ut inM.a/bi/jenne 

 dispositis. Pedes uti in hac specie colorati. 



Thracia J a van i c a. West ic. 



Tab. II. fig. 0. 



T. fuJva; abdoinine obscuriore vitta central! pallidiori. alis pallide byalinis: 

 anticis fascia lata eosrali fusea. 



Long. corp. lin. 2^. Expans. alar. lin. 13k. 



D 2 



