OF HOMOPTEROUS INSECTS. 



20. DeLPHAX LUTEIVITTA, Mas. 



Straminea; caput antieumproductum, eonicum ; frons nigra stra- 

 mineo striata ; prothorax Iristriatus, luteo bivitlatus; abdomen 

 nigrum fiavo fasciatum ; pedes fulvi; al<e limpidm. 

 Body straw-colour: head produced in front, conical; crown 

 narrow in front, notched on the hind border, its length exceeding its 

 breadth ; front black, very narrow, bordered with pale straw-colour, 

 adorned with two ridges of the same colour which are united towards 

 the epistoma : fore-chest broader than long, three-ridged, adorned 

 with two bright luteous stripes: middle-chest small, triangular: ab- 

 domen black, obconical, not longer than the chest ; hind borders of 

 the segments pale yellow : legs pale tawny : wings colourless ; veins 

 pale tawny : fore borders of the fore-wings darker towards the tips. 

 Length of the body \ line; of the wings 2\ lines. 

 a. United States. Presented by E. Doubleday, Esq. 



21. Delphax suBsTiTDA, Fem. 



Fmca ; thorax tricarinalus ; mesothorax fulm trivittatus ; abdo- 

 7nen apiee fulvum; pedes fulvi ; ales limpidte. 

 Body brown : head wanting : fore-chest with three ridges ; the 

 side pair diverging to the hind border, its length about one-fourth 

 of its breadth : three very slight almost parallel tawny ridges on the 

 middle-chest which is al)out thrice the length of the fore-chest, and 

 is angular towards the tip, the latter is tawuy : breast dull tawny : 

 abdomen obconical, longer than the chest, lawny at the tip : legs 

 tawny ; hind-shanks unarmed : wings colourless ; veins tawny. 

 Length of the body 1 line ; of the wings 2\ lines. 

 a. Charles Island, Galapagos. Presented by C. Darwin, Esq. 



22. Delphax unicolor, Mas. 



Flavo-fusca,subtits fuiva ; pedes fulvi ; ata perbreves, aniica fused, 

 poslicte limpida. 

 Body yellowish-brown, tawny beneath : front tawny, hardly 

 longer than broad, punctured along each side; epistoma yellow, tri- 

 angular, as long as the front : mouth tawny : abdomen obconical, 

 not longer than the chest : legs tawny : wings very short ; fore-wings 



